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2007 MRS Spring Meeting Logo2007 MRS Spring Meeting & Exhibit


April 9-13, 2007
| San Francisco
Meeting Chairs: Timothy J. Bunning, Harold Y. Hwang, Debra Kaiser, Jennifer A. Lewis

Symposium Y : Thin-Film Compound Semiconductor Photovoltaics

2007-04-10   Show All Abstracts

Symposium Organizers

Timothy Gessert National Renewable Energy Laboratory
Sylvain Marsillac University of Toledo
Takahiro Wada Ryukoku University
Ken Durose Durham University
Clemens Heske University of Nevada-Las Vegas
Y1: Growth and Performance of Compound Thin Film Solar Cells
Session Chairs
William Shafarman
Takahiro Wada
Tuesday PM, April 10, 2007
Room 2024 (Moscone West)

9:30 AM - **Y1.1
Challenges in Understanding Chalcopyrite Semiconductors for Photovoltaics.

Hans-Werner Schock 1
1 Solar Energy Technology, Hahn-Meitner-Institut, Berlin Germany

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10:00 AM - **Y1.2
Progress in CIGS Solar Cell Processes and Characterization.

Shigeru Niki 1 , Syogo Ishizuka 1 , Kei-ichiro Sakura 1 , Koji Matsubara 1 , Akimasa Yamada 1 , Hitoshi Tampo 1 , Hisayuki Nakanishi 2 , Norio Terada 3
1 RCPV, AIST, Tsukuba, Ibaraki, Japan, 2 , Tokyo University of Science, Noda, Chiba, Japan, 3 , Kagoshima University, Kagoshima, Kagoshima, Japan

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10:30 AM - Y1.3
A Novel Laser-Assisted Deposition Technique for CIGS Thin Films and Solar Cells.

Tokio Nakada 1 , Keita Nozawa 1 , Yasuyuki Ishii 1
1 Electrical Engineering and Electronics, Aoyama Gakuin University, Sagamihara Japan

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10:45 AM - Y1.4
A Liquid Precursor Approach to CuInSe2 Based Photovoltaics.

Jennifer Nekuda 1 2 , Maikel van Hest 2 , Calvin Curtis 2 , Alex Miedaner 2 , Ryan O'Hayre 1 , David Ginley 2
1 Metallurgy and Materials Engineering, Colorado School of Mines, Golden, Colorado, United States, 2 , National Renewable Energy Laboratory, Golden, Colorado, United States

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11:00 AM - *
Break

11:30 AM - **Y1.5
Development of Bi-facial CdTe Solar Cells on Glass and Polymer Substrates.

Genadiy Khripunov 2 , Alessandro Romeo 3 , Hans Zogg 2 , Ayodhya Tiwari 1 2
2 Thin Film Physics Group, ETH Zurich, Zurich Switzerland, 3 Faculty of Science, University of Verona, 37134 Verona, Italy Italy, 1 Electronic and Electrical Engineering, Loughborough University, Leicestershire United Kingdom

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12:00 PM - Y1.6
Preparation of Cu(In1-xGax)Se2 Thin Films and Solar Cells Using a Se-radical Beam Source.

Shogo Ishizuka 1 , Akimasa Yamada 1 , Hajime Shibata 1 , Keiichiro Sakurai 1 , Paul Fons 2 , Koji Matsubara 1 , Shigeru Niki 1
1 Research Center for Photovoltaics, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki Japan, 2 Center for Applied Near-Field Optics Research, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Japan

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12:15 PM - Y1.7
Temperature-dependent Degradation Modes in CdS/CdTe Devices.

David Albin 1 , Samuel Demtsu 2 , Anna Duda 1 , Wyatt Metzger 1
1 PV Devices and Electronic Materials, National Renewable Energy Laboratory, Golden, Colorado, United States, 2 , SoloPower Inc, Milipitas, California, United States

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12:30 PM - Y1.8
Investigation of ZnO:Al Doping Level and Deposition Temperature Effects on CIGS Solar Cell Performance.

Joel Duenow 1 2 , Timothy Gessert 2 , David Wood 1 , Brian Egaas 1 2 , Rommel Noufi 2 , Timothy Coutts 2
1 Dept. of Physics, Colorado School of Mines, Golden, Colorado, United States, 2 , National Renewable Energy Laboratory, Golden, Colorado, United States

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12:45 PM - Y1.9
InGaAs Solar Cells Grown on Wafer-Bonded InP/Si Epitaxial Templates.

James Zahler 2 , Katsuaki Tanabe 1 , Corinne Ladous 2 , Thomas Pinnington 2 , Frederick Newman 3 , Harry Atwater 1 2
2 , Aonex Technologies, Pasadena, California, United States, 1 Thomas J. Watson Laboratory of Applied Physics, California Institute of Technology, Pasadena, California, United States, 3 , Emcore Photovoltaics, Albuquerque, New Mexico, United States

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Y2: Novel Materials and Processes
Session Chairs
Ken Durose
Hans-Werner Schock
Tuesday PM, April 10, 2007
Room 2024 (Moscone West)

2:30 PM - **Y2.1
Issues for Composition Control in the Deposition of CuInSe2-based Alloys.

William Shafarman 1 , Robert Birkmire 1 , Shiro Nishiwaki 1 , Greg Hanket 1
1 Institute of Energy Conversion, University of Delaware, Newark, Delaware, United States

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3:00 PM - Y2.2
Fabrication and Characterization of Cd1-xMgxTe Thin Films and Their Application in Solar Cells

Ramesh Dhere 1 , Kannan Ramanathan 2 , John Scharf 1 , Bobby To 1 , Anna Duda 1 , Helio Moutinho 1 , Rommel Noufi 1
1 , National Renewable Energy Lab, Golden, Colorado, United States, 2 , MiaSole, Santa Clara, California, United States

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3:15 PM - Y2.3
Nanostructured ZnS:In2S3 Buffer Layers. Can Voltage and Efficiency be Improved Through Interface Inhomogeneities on a Scale Below the Minority Carrier Diffusion Length?

Nicholas Allsop 1 , Andreas Haensel 1 , Christian Camus 1 , Sophie Gledhill 1 , Iver Lauermann 1 , Christian Fischer 1 , Martha Lux-Steiner 1
1 Solar Energy - Heterogeneous Material Systems, Hahn-Meitner-Institute, Berlin Germany

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3:30 PM - Y2.4
Experimental and Theoretical Study of Fluorine Doping to Tin Oxide.

Xiaonan Li 1 , Sally Asher 1 , Joel Pankow 1 , Lei Kerr 2 , Mailasu Bai 3 , Timothy Gessert 1
1 5200, National Renewable Energy Laboratory, Golden, Colorado, United States, 2 , Miami University of Ohio, Oxford, Ohio, United States, 3 , Colorado School of Mines, Golden, Colorado, United States

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3:45 PM - Y2.5
Development of a Wide Band Gap Cd1-xMgxTe Film for Applications in Tandem Devices.

Xavier Mathew 1 2 , Anthony Vasko 1 , Jennifer Drayton 1 , Alvin Compaan 1
1 Physics and Astronomy, Univ. of Toledo, Toledo, Ohio, United States, 2 CIE, UNAM, Temixco, Morelos, Mexico

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4:00 PM - *
Break

4:30 PM - **Y2.6
Zn-based Buffer Layer and High-quality CIGS Films Grown by a Novel Method.

Akira Yamada 1 , Fanying Meng 1 , Yoshiyuki Chiba 2 , Makoto Konagai 2
1 Quantum Nanoelectronics Research Center, Tokyo Institute of Technology, Tokyo Japan, 2 Department of Physical Electronics, Tokyo Institute of Technology, Tokyo Japan

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5:00 PM - Y2.7
Growth and Characterization of Chalcopyrite Nanocrystals: Beyond Conventional Thin Films.

David Fuertes Marron 1 , Sebastian Lehmann 1 , Sascha Sadewasser 1 , Martha Ch. Lux-Steiner 1
1 Department of Solar Energy, Hahn-Meitner Institut, Berlin Germany

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5:15 PM - Y2.8
Transparent Back Contacts in CdTe/CdS: Evaluation for Tandem Cells.

Viral Parikh 1 , Anthony Vasko 1 , Alvin Compaan 1
1 Physics and Astronomy, University of Toledo, Toledo, Ohio, United States

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5:30 PM - Y2.9
An Indium Free Transparent Conductive Oxide: doped TiO2.

M. van Hest 1 , M. Gillispie 2 , M. Dabney 1 , J. Perkins 1 , D. Ginley 1
1 , National Renewable Energy Laboratory, Golden, Colorado, United States, 2 , Iowa State University, Ames, Iowa, United States

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5:45 PM - Y2.10
Towards Lower Deposition Temperatures of Spray Deposited ZnO Films.

Sophie Gledhill 1 , Pablo Thier 1 , Nicholas Allsop 1 , Martha Lux-Steiner 1 , Christian Herbert Fischer 1
1 Solar Energy 2, Hahn-Meitner Institute, Berlin Germany

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Y3: Posters
Session Chairs
Tim Gessert
Wednesday AM, April 11, 2007
Salon Level (Marriott)

9:00 PM - Y3.1
In-situ Characterization of As-grown Surface of CIGS Films.

Hirotake Kashiwabara 1 , Shimpei Teshima 1 , Kazuya Kikunaga 1 , Kazunori Takeshita 1 , Tetsuji Okuda 1 , Kozo Obara 1 , Keiichiro Sakurai 2 , Shogo Ishizuka 2 , Akimasa Yamada 2 , Koji Matsubara 2 , Shigeru Niki 2 , Norio Terada 1 2
1 Nano-Structure and Advanced Materials, Kaghosima University, Kagoshima Japan, 2 Research Center for Photovoltaics, National Institute of Advanced Industrial Science and Technology, Tsukuba Japan

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9:00 PM - Y3.10
Compositional Variance of Conductivity in Sputter-Deposited Amorphous Indium Zinc Oxide Transparent Films

Andrew Leenheer 1 2 , John Perkins 2 , Andrew Cavendor 1 2 , Matthew Taylor 2 , Maikel van Hest 2 , Ryan O'Hayre 1 , David Ginley 2
1 Materials Science, Colorado School of Mines, Golden, Colorado, United States, 2 National Center for Photovoltaics, National Renewable Energy Lab, Golden, Colorado, United States

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9:00 PM - Y3.11
Device Behavior of Cu(InGa)(SeS)2 Solar Cells with >1.5 eV Bandgap.

Shiro Nishiwaki 1 , William Shafarman 1
1 , Institute of Energy Conversion, Newark, Delaware, United States

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9:00 PM - Y3.12
Characterization of ZnO Thin Film Prepared by Solid Source Chemical Vapor Deposition.

Hau-Ting Hu 1 , Yang-Chun Fang 1 , Shih-Hsuan Yang 1 , Liang Chao 1
1 Electronic Engineering, National Taiwan University of Science and Technology, Taipei Taiwan

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9:00 PM - Y3.13
In situ Investigation of Reaction Pathways of Cu-Se, In-Se and Ga-Se Mixed and Bilayer Precursors.

Woo Kyoung Kim 1 , E. Andrew Payzant 2 , Tim Anderson 1
1 Chemical Engineering, University of Florida, Gainesville, Florida, United States, 2 Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, United States

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9:00 PM - Y3.14
First-principles Calculations on Zn1-xMgxO Window Layer for CIS Thin Film Solar Cells.

Tsuyoshi Maeda 1 , Akio Shigemi 1 , Takahiro Wada 1
1 Materials Chemistry, Ryukoku University, Otsu, Shiga, Japan

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9:00 PM - Y3.15
Fabrication of (Cu,Ag)InSe2 Thin films by a Combination of Mechanochemical and Screen Printing/Sintering Processes

Syuusuke Nomura 1 , Yoshihiro Matsuo 1 , Takahiro Wada 1
1 Materials Chemistry, Ryukoku University, Otsu, Shiga, Japan

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9:00 PM - Y3.16
Validation of the p-type Behavior of an Ag-doped ZnSe Film Grown Heteroepitaxially on GaAs(100) Substrate.

Takashi Narushima 1 , Hiroaki Yanagita 1 , Masahiro Orita 1
1 R&D Center, HOYA Corporation, Tokyo Japan

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9:00 PM - Y3.17
ZnO Thin Films Prepared by Thermal Oxidation of Metallic Zinc Films.

Chon-Chi Liau 1 , Liang Chao 1
1 Electronic Engineering, National Taiwan University of Science and Technology, Taipei Taiwan

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9:00 PM - Y3.18
Synthesis of Size-controlled ZnO Seed for Nanorod Growth and its Application to Solar Cell.

Ki Seok Kim 1 , Gun-Young Jung 1
1 Material Science & Engineering, Gwnagju Institute of Science & Engineering, Gwangju Korea (the Republic of)

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9:00 PM - Y3.19
Study of Band Alignment at CBD-CdS/Cu(In1-xGax)Se2 (x = 0.2 ~ 1.0) Interfaces by Photoemission and Inverse Photoemission Spectroscopy.

Shimpei Teshima 1 , Hirotake Kashiwabara 1 , Keimei Masamoto 1 , Kazuya Kikunaga 1 , Kazunori Takeshita 1 , Tetsuji Okuda 1 , Keiichiro Sakurai 2 , Shogo Ishizuka 2 , Akimasa Yamada 2 , Koji Matsubara 2 , Shigeru Niki 2 , Norio Terada 1 2
1 Nano-Structure and Advanced Materials, Kagoshima University, Kagoshima Japan, 2 Research Center for Photovoltaics, National Institute of Advanced Industrial Science and Technology, Tsukuba Japan

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9:00 PM - Y3.2
Room Temperature Growth of Indium Oxide Films by Reactive Ion Beam Assisted Deposition.

Kai Wang 1 , Yuriy Vygranenko 1 , Arokia Nathan 2
1 Electrical & computer engineering, University of Waterloo, Waterloo, Ontario, Canada, 2 London Center for Nanotechnology, University College London, London United Kingdom

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9:00 PM - Y3.20
Characteristics of ZnO thin film Deposited by Atomic Layer Deposition Method.

Jae Sung Hur 1 , Chang-Sik Son 2 , Dong-Gun Lee 1 , Samseok Jang 1 , Jung-Bin Song 1 , In-Hoon Choi 1 , Dongjin Byun 1 , Byoung-Hoon Lee 1
1 Material science and engineering, Korea Univ., Seoul Korea (the Republic of), 2 Photonics, Silla Univ., Pusan Korea (the Republic of)

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9:00 PM - Y3.21
Copper-Indium-Boron-Diselenide Absorber Materials.

Ned Ianno 1 , Tobin Santero 1 , Rodney Soukup 1 , Chrisropher Exstrom 2 , Scott Darveau 2 , Jiri Olejnicek 2
1 Electrical Engineering, University of Nebraska-Lincoln, Lincoln, Nebraska, United States, 2 Chemistry, University of Nebraska at Kearney, Kearney, Nebraska, United States

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9:00 PM - Y3.22
Effect of Bias Light on Photovoltage Decay in CdTe/CdS Solar Cells.

Kent Price 1
1 , Morehead State University, Morehead, Kentucky, United States

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9:00 PM - Y3.23
All-CSS CdTe Solar-Cell Fabrication Process with Thinner CdS Layers.

Alan Davies 1 , J. Sites 1 , R. Enzenroth 1
1 , Colorado State University, Fort Collins, Colorado, United States

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9:00 PM - Y3.24
Optimization Of Electro Deposited In2S3 Buffer Layers In CuInS2 Cells.

Teodor Todorov 1 , Juan Carda 1 , Eloisa Cordoncillo 1 , Purificacion Escribano 1 , Joachim Klaer 2 , Reiner Klenk 2
1 Inorganic and Organic Chemistry, Universidad Jaume I, Castellón de la Plana, Castellón, Spain, 2 , Hahn-Meitner-Institut , Berlin Germany

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9:00 PM - Y3.25
Surface Morphologies and Optical Properties of Homoepitaxial ZnO by Close-Spaced Chemical Vapor Transport.

Koji Abe 1 , Tetsuya Tokuda 1 , Yuta Banno 1 , Osamu Eryu 1
1 Electrical and Electronic Engineering, Nagoya Institute of Technology, Nagoya Japan

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9:00 PM - Y3.26
Effect of Stress Field on Component Diffusion in Multilayer Thin Films.

Phaniraj Madakashira 1 , Vikash Sinha 1 , Om Prakash 1
1 , GE India Technology Center, Bangalore India

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9:00 PM - Y3.27
Solvothermal Synthesis of Copper Indium Diselenides using Alkyamines as Additives

Juyeon Chang 1 , Hye Jin Nam 1 , Geun-Tae Cho 1 , Duk-Young Jung 1
1 Chemistry, SungKyunKwan Univ., Suwon, Gyeonggi-do, Korea (the Republic of)

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9:00 PM - Y3.28
Cu-doped ZnSe Film with Stoichiometric Composition Deposited at Room Temperature using Compound Sources.

Masahiro Orita 1 , Takashi Narushima 1 , Hiroaki Yanagita 1
1 R&D Center, HOYA Corporation, Akishima-shi, Tokyo, Japan

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9:00 PM - Y3.29
The Formation of CuInSe2 Thin Film Solar Cell Absorbers from Electroplated Precursors.

Stefan Jost 1 , Frank Hergert 1 , Rainer Hock 1 , Torsten Voss 2 , Joerg Schulze 2 , Andreas Kirbs 2 , Michael Purwins 3 , Markus Schmid 3
1 Chair for Crystallography and Structural Physics, University of Erlangen-Nürnberg, Erlangen Germany, 2 , Atotech Deutschland GmbH, Berlin Germany, 3 Crystal Growth Laboratory, Department of Materials Science VI, University of Erlangen-Nürnberg, Erlangen Germany

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9:00 PM - Y3.3
Study of CIGS Solar Cells Back Contact.

Sylvain Marsillac 1
1 Physics and Astronomy, University of Toledo, Toledo, Ohio, United States

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9:00 PM - Y3.30
Characterization of CdS/CdTe Solar Cells Fabricated By Different Processes.

Tamara Potlog 1 , Khrypunov Gennadiy 2 , Kaelin Marc 3 , Zogg Hans 3 , Tiwari Ayodhya N. 2
1 Physics, Moldova State University, Chisinau Moldova (the Republic of), 2 Materials for Electronic and Solar Cells, National Technical University “Kharkov Polytechnic Institute”, Kharkov Ukraine, 3 Thin Film Physics Group, Laboratory for Solid State Physics, ETH Zurich ETH Building-Technopark, Technoparkstr.1 , CH-8005 Zurich Switzerland

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9:00 PM - Y3.31
Photocurrent Spectral Distribution and Relaxation in CdS/CdTe Heterojunctions

Sergiu Vatavu 1 , Iuliana Caraman 2 , Petru Gasin 1
1 Physics, Moldova State University, Chisinau Moldova (the Republic of), 2 Engineering, University of Bacau, Bacau Romania

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9:00 PM - Y3.32
Alternative Route To Obtain Photovoltaic Thin Film Of CdTe.

Claudio Carvalho 1 , Rodolfo Fernandes 1 , Victor Reynoso 1
1 Physics and Chemistry, Universidade Estadual Paulista - UNESP, Ilha Solteira, SP, Brazil

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9:00 PM - Y3.33
Formation of Zn-In-Se Compounds on CIGS Film by the Thermal Annealing in Dimethylzinc Stream.

Mutsumi Sugiyama 1 , Atsushi Miyama 1 , Akihisa Umezawa 1 , Toshihiro Yasuniwa 1 , Atsuki Kinoshita 1 , Hisayuki Nakanishi 1 , Shigefusa Chichibu 2
1 Dept. of Electrical Engineering, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba Japan, 2 Inst. of Applied Physics, University of Tsukuba, 1-1-1 Tennodai, Tsukuba Japan

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9:00 PM - Y3.34
On the Origins of Impurities in CdTe-based Thin Film Solar Cells.

Mahieddine Emziane 1 , Douglas Halliday 1 , Ken Durose 1
1 Department of Physics, Durham University, Durham United Kingdom

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9:00 PM - Y3.35
Formation of Cu2ZnSnS4 and Cu2ZnSnS4-CuInS2 Thin Films Investigated by In-situ Energy Dispersive X-ray Diffraction.

Alfons Weber 1 , Immo Koetschau 1 , Susan Schorr 1 , Hans-Werner Schock 1
1 Solar Energy Division, Hahn-Meitner-Institut, Berlin Germany

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9:00 PM - Y3.37
Electronic Structure of CuInSe2 Thin Films.

Christian Pettenkofer 1 , Carsten Lehmann 1 , Volker Eyert 2
1 SE6, HMI, Berlin Germany, 2 , Universität Augsburg, Augsburg Germany

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9:00 PM - Y3.4
Photosensitivity of Thin Variable-gap p-n Structures with a Triangular Profile of Energy Band Diagram.

Bogdan Sokolovskii 1
1 Department of Electronics, Ivan Franko University of Lviv, Lviv Ukraine

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9:00 PM - Y3.5
Structure and Microstructure of Zn2x(CuBIII)1-xX2 Semiconductors (BIII=Ga,In;X=S,Se,Te)

Susan Schorr 1 , Gerald Wagner 2 , Michael Tovar 3 , Denis Sheptyakov 4
1 Solar Energy Research (SE3), Hahn-Meitner-Institute Berlin, Berlin Germany, 2 Institute of Mineralogy, Crystallography and Materials Science, University Leipzig, Leipzig Germany, 3 Structural Research (SF1), Hahn-Meitner-Institute Berlin, Berlin Germany, 4 Laboratory for neutron Scattering, ETH Zuerich&PSI Villigen, Villigen Switzerland

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9:00 PM - Y3.6
Growth and Characterization of Erbium Doped ZnO Prepared by Vapor Phase Transport Process.

Shih-Hsuan Yang 1 , Liang Chao 1
1 Electronic Engineering, National Taiwan University of Science and Technology, Taipei Taiwan

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9:00 PM - Y3.7
Electronic Transport in CuIn(S,Se)2 Electrodeposited Based Solar cells, Limiting Causes for 10% Efficiencies.

Arouna Darga 1 , Veronica Bermudez 2 , Denis Mencaraglia 1 , Olivier Kerrec 2
1 , LGEP- CNRS, Gif Sur Yvette France, 2 , IRDEP (CNRS-EDF), Chatou France

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9:00 PM - Y3.8
Electroluminescence from Cu(In,Ga)Se2 Thin-film Solar Cells.

Thomas Kirchartz 1 , Uwe Rau 1 , Julian Mattheis 1
1 Institute of Physical Electronics, University of Stuttgart, Stuttgart Germany

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9:00 PM - Y3.9
Growth and Characterization of Electrodeposited CIS Absorbers.

Shalini Menezes 1 , Yan Li 1 , Subba Kodigala 1 , Sharmila Menezes 1 , Joe Rose 1 , Anura Samantilleke 2
1 , InterPhases Research, Westlake Village, California, United States, 2 Department of Chemistry, University of Bath, BATH BA2 7AY United Kingdom

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9:00 PM - Y3:PosterI
Y3.38 TRANSFERRED TO Y1.4

Show Abstract

2007-04-11   Show All Abstracts

Symposium Organizers

Timothy Gessert National Renewable Energy Laboratory
Sylvain Marsillac University of Toledo
Takahiro Wada Ryukoku University
Ken Durose Durham University
Clemens Heske University of Nevada-Las Vegas
Y6: Discussion Session I: What Else is Needed for a Healthy Thin-film PV Industry?
Session Chairs
Dieter Bonnet
Shigeru Niki
Bolko v. Roedern
Wednesday PM, April 11, 2007
Room 2024 (Moscone West)

9:00 AM - **L7.1
Local Electrostatic Modulation of Superconductivity in Nb-doped SrTiO3 Films.

Kei Takahashi 1 , Nicolas Reyren 1 , Andrea Caviglia 1 , Marc Gabay 2 , Keisuke Shibuya 3 , Tsuyoshi Ohnishi 3 , Mikk Lippmaa 3 , Didier Jaccard 1 , Jean-Marc Triscone 1
1 Département de Physique de la Matière Condensée, University of Geneva, Genève Switzerland, 2 Laboratoire de Physique des Solides, Université de Paris-Sud, Orsay France, 3 Institute for solid state physics, University of Tokyo, Chiba Japan

Show Abstract

Y4: Defects and Impurities
Session Chairs
Sally Asher
Ayodhya Nath Tiwari
Wednesday PM, April 11, 2007
Room 2024 (Moscone West)

9:30 AM - **Y4.1
Metastable Defect Distributions in CIGS Solar Cells and Their Impact on Device Efficiency.

Malgorzata Igalson 1
1 Faculty of Physics, Warsaw University of Technology, Warszawa Poland

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Y6: Discussion Session I: What Else is Needed for a Healthy Thin-film PV Industry?
Session Chairs
Dieter Bonnet
Shigeru Niki
Bolko v. Roedern
Wednesday PM, April 11, 2007
Room 2024 (Moscone West)

9:30 AM - L7.2
Dynamic Studies of Ferroelectric Domain Switching for Thin Films with Interfaces of Varying Orientation using High Speed Piezo Force Microscopy.

Ramesh Nath 1 , Ying-Hao Chu 2 , Ramamoorthy Ramesh 2 , Bryan Huey 1
1 Chemical, Materials and Biomolecular Engineering, University of Connecticut, Storrs, Connecticut, United States, 2 Materials Science and Engineering, University of California, Berkeley, Berkeley, California, United States

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9:45 AM - L7.3
Internal Structure of Ferroelectric BaTiO3/ SrTiO3 Superlattices.

Dillon Fong 1 , A. Soukiassian 2 , S. Nakhmanson 1 , J. Eastman 1 , P. Fuoss 1 , S. Streiffer 3 , Y. Li 2 4 , L. Chen 2 , K. Rabe 5 , D. Schlom 2 , X. Xi 6
1 Materials Science Division, Argonne National Laboratory, Argonne, Illinois, United States, 2 Department of Materials Science & Engineering, Pennsylvania State University, University Park, Pennsylvania, United States, 3 Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois, United States, 4 Materials Physics & Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico, United States, 5 Department of Physics & Astronomy, Rutgers, The State University of New Jersey, Piscataway, New Jersey, United States, 6 Department of Physics, Pennsylvania State University, University Park, Pennsylvania, United States

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Y4: Defects and Impurities
Session Chairs
Sally Asher
Ayodhya Nath Tiwari
Wednesday PM, April 11, 2007
Room 2024 (Moscone West)

10:00 AM - Y4.2
Understanding Metastable Defect Creation in CIGS by Detailed Device Modeling and Measurements on Bifacial Solar Cells.

JinWoo Lee 1 , David Berney Needleman 1 , William Shafarman 2 , J. David Cohen 1
1 Physics, Univ. of Oregon, Eugene, Oregon, United States, 2 Institute of Energy Conversion, University of Delaware, Newark, Delaware, United States

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Y6: Discussion Session I: What Else is Needed for a Healthy Thin-film PV Industry?
Session Chairs
Dieter Bonnet
Shigeru Niki
Bolko v. Roedern
Wednesday PM, April 11, 2007
Room 2024 (Moscone West)

10:00 AM - **L7.4
Electronic Properties of All-oxide Metal-ferroelectric Interfaces.

Marin Alexe 1 , Lucian Pintilie 1 , Ionela Vrejoiu 1 , Dietrich Hesse 1 , Gwenael Le Rhun 1 , Burc Misirlioglu 1 , Ulrich Goesele 1
1 , Max Planck Institute of Microstructure Physics, Halle Germany

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Y4: Defects and Impurities
Session Chairs
Sally Asher
Ayodhya Nath Tiwari
Wednesday PM, April 11, 2007
Room 2024 (Moscone West)

10:15 AM - Y4.3
Prediction of Materials Properties for Cu(In,Ga)Se2 Photovoltaic Absorbers: Fermi Level Pinning, Light- and Bias Induced Metastability, and Electron Traps.

Stephan Lany 1 , Alex Zunger 1
1 , National Renewable Energy Laboratory, Golden, Colorado, United States

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10:30 AM - Y4.4
Energetics of Both Minority and Majority Carrier Transitions through Deep Defects in Wide Bandgap Pentenary Cu(In,Ga)(Se,S)2 Thin Film Solar Cells.

Adam Halverson 1 , Shiro Nishiwaki 2 , William Shafarman 2 , J. David Cohen 1
1 Department of Physics, University of Oregon, Eugene, Oregon, United States, 2 Institute of Energy Conversion, University of Delaware, Newark, Delaware, United States

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Y6: Discussion Session I: What Else is Needed for a Healthy Thin-film PV Industry?
Session Chairs
Dieter Bonnet
Shigeru Niki
Bolko v. Roedern
Wednesday PM, April 11, 2007
Room 2024 (Moscone West)

10:30 AM - L7.5
Monodomain To Polydomain Transition In Ferroelectric PbTiO3 Thin Films: The Role Of Electrical Boundary Conditions.

Celine Lichtensteiger 1 , Matthew Dawber 1 , Nicolas Stucki 1 , Jean-Marc Triscone 1 , Jason Hoffman 2 , Jeng-Bang Yau 2 , Charles H. Ahn 2
1 DPMC, University of Geneva, Geneva Switzerland, 2 Department of Applied Physics, Yale University, New Haven, Connecticut, United States

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Y4: Defects and Impurities
Session Chairs
Sally Asher
Ayodhya Nath Tiwari
Wednesday PM, April 11, 2007
Room 2024 (Moscone West)

10:45 AM - *
Break

Y6: Discussion Session I: What Else is Needed for a Healthy Thin-film PV Industry?
Session Chairs
Dieter Bonnet
Shigeru Niki
Bolko v. Roedern
Wednesday PM, April 11, 2007
Room 2024 (Moscone West)

10:45 AM - L7.6
Breaking of the Tetragonality-polarization Coupling in Ultra-thin Epitaxial Ferroelectrics.

Chun-Lin Jia 1 , Nagarajan Valanoor 2 , Jia-Qing He 1 , Lothar Houben 1 , Tong Zhao 3 , Ramamoorthy Ramesh 3 , Rainer Waser 4 , Knut Urban 1
1 Institute of Solid State Research and Ernst Ruska Center for Microscopy and Spectroscopy with Electrons, Forschungszentrum Juelich, Juelich, NRW, Germany, 2 Materials Science and Engineering, University of New South Wales, Sydney, New South Wales, Australia, 3 Materials Science and Engineering, University of California, Berkeley, California, United States, 4 Institute for Solid State Research and Centre for Nanoelectronic Systems for Information Technology, Forschungszentrum Juelich, Juelich, NRW, Germany

Show Abstract

11:00 AM - Y6:DiscI
BREAK

Y4: Defects and Impurities
Session Chairs
Sally Asher
Ayodhya Nath Tiwari
Wednesday PM, April 11, 2007
Room 2024 (Moscone West)

11:15 AM - **Y4.5
Relationships Between CdS/CdTe Materials Composition and Device Performance.

Sally Asher 1 , T. Gessert 1 , M. Young 1 , C. Perkins 1 , G. Teeter 1 , J. Pankow 1 , D. Albin 1 , X. Wu 1
1 , NREL, Golden, Colorado, United States

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Y6: Discussion Session I: What Else is Needed for a Healthy Thin-film PV Industry?
Session Chairs
Dieter Bonnet
Shigeru Niki
Bolko v. Roedern
Wednesday PM, April 11, 2007
Room 2024 (Moscone West)

11:30 AM - L7.7
Chemical Switching of Ferroelectricity in Monodomain PbTiO3 Films.

Paul Fuoss 1 , Ruey-Ven Wang 1 2 , Dillon Fong 1 , Fan Jiang 1 , Stephen Streiffer 2 1 , Jeffery Eastman 1 , G. Stephenson 1 , Carol Thompson 3 , Kujtim Latifi 3
1 Materials Science Division, Argonne National Laboratory, Argonne, Illinois, United States, 2 Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois, United States, 3 Department of Physics, Northern Illinois University, DeKalb, Illinois, United States

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Y4: Defects and Impurities
Session Chairs
Sally Asher
Ayodhya Nath Tiwari
Wednesday PM, April 11, 2007
Room 2024 (Moscone West)

11:45 AM - Y4.6
Study of Recombination in Cu(In,Ga)Se2 Solar Cells by Time-Resolved Photoluminescence.

Sho Shirakata 1 , Tokio Nakada 2
1 Department of Electrical and Electronic Engineering, Ehime University, Matsuyama, Ehime, Japan, 2 Department of Electrical Engineering and Electronics, Aoyama Gakuin University, Sagamihara, Kanagawa, Japan

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Y6: Discussion Session I: What Else is Needed for a Healthy Thin-film PV Industry?
Session Chairs
Dieter Bonnet
Shigeru Niki
Bolko v. Roedern
Wednesday PM, April 11, 2007
Room 2024 (Moscone West)

11:45 AM - **L7.8
Spintronics with Multiferroics.

Agnes Barthelemy 1 , Helene Bea 1 , Martin Gajek 1 , Manuel Bibes 2 , Karim Bouzehouane 1 , Stephane Fusil 1 , Benedicte Warot-Fonrose 4 , Selia Cherifi 5 , Gervasi Herranz 1 , Eric Jacquet 1 , Cyrille Deranlot 1 , Josep Fontcuberta 3
1 , Unité Mixte CNRS/Thales, Palaiseau France, 2 , IEF, Orsay France, 4 , CEMES-CNRS, Toulouse France, 5 , Laboratoire Louis Néel, Grenoble France, 3 , ICMAB, Barcelona Spain

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Y4: Defects and Impurities
Session Chairs
Sally Asher
Ayodhya Nath Tiwari
Wednesday PM, April 11, 2007
Room 2024 (Moscone West)

12:00 PM - Y4.7
Stability and Electronic Structures of CuxTe

Juarez Da Silva 1 , Su-Huai Wei 1 , J. Zhou 1 , X. Wu 1
1 , National Renewable Energy Laboratory, Golden, Colorado, United States

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12:15 PM - Y4.8
Controlling Stoichiometric Defects in CdTe Polycrystalline Thin Films.

Brian McCandless 1
1 Institute of Energy Conversion, University of Delaware, Newark, Delaware, United States

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Y6: Discussion Session I: What Else is Needed for a Healthy Thin-film PV Industry?
Session Chairs
Dieter Bonnet
Shigeru Niki
Bolko v. Roedern
Wednesday PM, April 11, 2007
Room 2024 (Moscone West)

12:15 PM - L7.9
Properties of BaFeO3-Based Thin Films and Superlattices

Charlee Callender 1 , Mat Ivill 1 , David Norton 1 , Ritesh Das 2 , Arthur Hebard 2 , John Budai 3
1 Dept. of Materials Science & Engineering, University of Florida, Gainesville, Florida, United States, 2 Dept. of Physics, University of Florida, Gainesville, Florida, United States, 3 Materials Science & Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, United States

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Y4: Defects and Impurities
Session Chairs
Sally Asher
Ayodhya Nath Tiwari
Wednesday PM, April 11, 2007
Room 2024 (Moscone West)

12:30 PM - Y4.9
Locations of Cu in CdTe Solar Cells.

Yanfa Yan 1 , Kim Jones 1 , Xuanzhi Wu 1 , Mowafak Al-Jassim 1
1 , National Renewable Energy Laboratory, Golden, Colorado, United States

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Y6: Discussion Session I: What Else is Needed for a Healthy Thin-film PV Industry?
Session Chairs
Dieter Bonnet
Shigeru Niki
Bolko v. Roedern
Wednesday PM, April 11, 2007
Room 2024 (Moscone West)

12:30 PM - L7.10
Understanding the Ferromagnetic-antiferromagnetic Interface in Co/BiFeO3 Multifunctional Heterostructures.

Kilho Lee 1 2 , Ying-Hao Chu 1 2 , Junwoo Choi 2 , Mikel Barry 2 , Andreas Scholl 3 , Lane Martin 1 , Peiling Yang 1 , Pu Yu 2 , Seung-Yeul Yang 1 2 , Qian Zhan 1 2 , Zi-Qiang Qiu 2 , Ramamoorthy Ramesh 1 2
1 Department of Materials Science and Engineering, University of California, Berkeley, Berkeley, California, United States, 2 Department of Physics, University of California, Berkeley, Berkeley, California, United States, 3 Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California, United States

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Y4: Defects and Impurities
Session Chairs
Sally Asher
Ayodhya Nath Tiwari
Wednesday PM, April 11, 2007
Room 2024 (Moscone West)

12:45 PM - Y4.10
Effect of O2 Concentration During the Post-deposition Anneal on the Efficiency of CdS/CdTe Cells Annealed with CdCl2 or TeCl4.

Joseph Beach 1 2 , F. Seymour 1 2 , V. Kaydanov 2 , T. Ohno 2 , S. Peabody 1 2
1 , PrimeStar Solar Inc., Longmont, Colorado, United States, 2 Physics Department, Colorado School of Mines, Golden, Colorado, United States

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Y6: Discussion Session I: What Else is Needed for a Healthy Thin-film PV Industry?
Session Chairs
Dieter Bonnet
Shigeru Niki
Bolko v. Roedern
Wednesday PM, April 11, 2007
Room 2024 (Moscone West)

12:45 PM - L7.11
Growth of BiFeO3 Thin Films on (001) SrTiO3 and (0001) GaN by Molecular Beam Epitaxy.

Jon Ihlefeld 1 2 , Wei Tian 1 , Ramamoorthy Ramesh 2 , Darrell Schlom 1
1 Materials Science and Engineering, Pennsylvania State University, University Park, Pennsylvania, United States, 2 Materials Science and Engineering, University of California, Berkeley, California, United States

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Y5: Industrial Perspectives
Session Chairs
Shigeru Niki
Bolko v. Roedern
Wednesday PM, April 11, 2007
Room 2024 (Moscone West)

2:30 PM - **Y5.1
On Industrial Production of Thin Film CdTe PV Modules

Dieter Bonnet 1
1 , SOLARPACT, D-61381 Friedrichsdorf Germany

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3:00 PM - **Y5.2
Scalable, Manufacturable, TF-on-glass: from $1.59/W to $1/W.

David Eaglesham 1
1 , First Solar, Perrysburg, Ohio, United States

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3:30 PM - *
Break

4:00 PM - **Y5.3
The Next Generation of Thin-film Photovoltaics.

Chris Eberspacher 1 , Craig Leidholm 1 , Alex Pudov 1 , Matthew Robinson 1 , Jeroen van Duren 1
1 , Nanosolar, Palo Alto, California, United States

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2007-04-12   Show All Abstracts

Symposium Organizers

Timothy Gessert National Renewable Energy Laboratory
Sylvain Marsillac University of Toledo
Takahiro Wada Ryukoku University
Ken Durose Durham University
Clemens Heske University of Nevada-Las Vegas
Y7: Contacts and Interfaces
Session Chairs
Dieter Bonnet
Miguel Contreras
Thursday AM, April 12, 2007
Room 2024 (Moscone West)

9:30 AM - **Y7.1
The Role of Electronic Processes During Junction Formation in Cu(In,Ga)Se2 Thin Film Solar Cells.

Kannan Ramanathan 1
1 , Miasole, Santa Clara, California, United States

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Y12: Poster Session II
Session Chairs
Ken Durose
Friday AM, April 13, 2007
Salon Level (Marriott)

9:30 AM - **Y13.1
Polarized Luminescence of Defects in CuGaSe2.

Susanne Siebentritt 1
1 , Hahn-Meitner-Institut, Berlin Germany

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Y7: Contacts and Interfaces
Session Chairs
Dieter Bonnet
Miguel Contreras
Thursday PM, April 12, 2007
Room 2024 (Moscone West)

10:00 AM - Y7.2
Alternative Back Contacts for Cu(In,Ga)Se2 Solar Cells.

David Bremaud 1 , Adrian Chirila 1 , Chris Hibberd 2 , Ayodhya Tiwari 1 2
1 Thin Film Physics Group, ETH Zurich, Zurich Switzerland, 2 CREST (Centre for Renewable Energy Systems and Technology), Loughborough University, Leicestershire United Kingdom

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Y12: Poster Session II
Session Chairs
Ken Durose
Friday AM, April 13, 2007
Salon Level (Marriott)

10:00 AM - Y13.2
Optical Depth-Profiling of The CdTe Solar Cell Structure By Spectroscopic Ellipsometry.

Jie Chen 1 , Jian Li 1 , Robert Collins 1
1 Physics and Astronomy, University of Toledo, Toledo, Ohio, United States

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Y7: Contacts and Interfaces
Session Chairs
Dieter Bonnet
Miguel Contreras
Thursday PM, April 12, 2007
Room 2024 (Moscone West)

10:15 AM - Y7.3
Variable Light Soaking Effect of Cu(In,Ga)Se2 Solar Cells with Conduction Band Offset Control of Window/Cu(In,Ga)Se2 Layers.

Takashi Minemoto 1 , Yasuhiro Hashimoto 2 , Takuya Satoh 2 , Takayuki Negami 2 , Hideyuki Takakura 1
1 Photonics, Ritsumeikan University, Kusatsu, Shiga, Japan, 2 Advanced Devices Development Center, Matsushita Electric Ind. Co., Ltd., Soraku-gun, Kyoto, Japan

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Y12: Poster Session II
Session Chairs
Ken Durose
Friday AM, April 13, 2007
Salon Level (Marriott)

10:15 AM - Y13.3
The Mechanism of J-V ``roll-over" in CdS/CdTe Devices.

Jie Zhou 1 , Xuanzhi Wu 1
1 , national renewable energy lab, Golden, Colorado, United States

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Y7: Contacts and Interfaces
Session Chairs
Dieter Bonnet
Miguel Contreras
Thursday PM, April 12, 2007
Room 2024 (Moscone West)

10:30 AM - Y7.4
Study of Band Alignment at the Interface between CBD-CdS and CIGS Grown by H2O-introduced co-evaporation.

Norio Terada 1 2 , Hirotake Kashiwabara 1 , Shinpei Teshima 1 , Keimei Masamoto 1 , Tetsuji Okuda 1 , Kozo Obara 2 , Shogo Ishizuka 2 , Keiichiro Sakurai 2 , Akimasa Yamada 2 , Koji Matsubara 2 , Shigeru Niki 2
1 Nano-Structure and Advanced Materials, Kagoshima University, Kagoshima Japan, 2 Research Center for Photovoltaics, National Institute of Advanced Industrial Science and Technology, Tsukuba Japan

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Y12: Poster Session II
Session Chairs
Ken Durose
Friday AM, April 13, 2007
Salon Level (Marriott)

10:30 AM - Y13.4
UPS Measurements of CdTe(111)-B with Surface-segregated Cu: Evidence of a Metallic Surface State and Implications for Ohmic-contact Formation.

Glenn Teeter 1
1 , National Renewable Energy Laboratory, Golden, Colorado, United States

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Y7: Contacts and Interfaces
Session Chairs
Dieter Bonnet
Miguel Contreras
Thursday PM, April 12, 2007
Room 2024 (Moscone West)

10:45 AM - *
Break

Y12: Poster Session II
Session Chairs
Ken Durose
Friday AM, April 13, 2007
Salon Level (Marriott)

10:45 AM - Y13.5
Some are Different from others: High Temperature Structural Phase Transitions in Ternary Chalcopyrites

Susan Schorr 1 , Guillaume Geandier 2 4 , Boris Korzun 3
1 Solar Energy Research (SE3), Hahn-Meitner-Institute Berlin, Berlin Germany, 2 , European Synchrotron Radiation Facility (ESRF), Grenoble France, 4 Advanced Light Source, Lawrence berkeley National Laboratory, Berkeley, California, United States, 3 Institute of Physics of Solids and Semiconductors, National Academy of Science Belarus, Minsk Belarus

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11:00 AM - *
Break

Y7: Contacts and Interfaces
Session Chairs
Dieter Bonnet
Miguel Contreras
Thursday PM, April 12, 2007
Room 2024 (Moscone West)

11:15 AM - Y7.5
Exploring Back Contact Technology to Increase CdS/CdTe Solar Cell Efficiency.

Alan Fahrenbruch 1
1 Dept. of Physics, Colorado State University, Fort Collins, Colorado, United States

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11:30 AM - Y7.6
X-ray and Electron Spectroscopy Investigation of Interfaces and Surfaces in CdTe Thin Film Solar Cells.

Lothar Weinhardt 1 , XiangXin Liu 2 , Jie Zhou 3 , Marcus Baer 1 , Timo Hofmann 1 , Oliver Fuchs 4 , Alvin Compaan 2 , Xuanzhi Wu 3 , Clemens Heske 1
1 Chemistry Department, University of Nevada, Las Vegas, Las Vegas, Nevada, United States, 2 Center for Materials Science and Engineering, University of Toledo, Toledo, Ohio, United States, 3 , National Renewable Energy Laboratory, Golden, Colorado, United States, 4 Experimentelle Physik II, Universität Würzburg, Würzburg Germany

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Y12: Poster Session II
Session Chairs
Ken Durose
Friday AM, April 13, 2007
Salon Level (Marriott)

11:30 AM - **Y13.6
Preferred Orientation in Polycrystalline Cu(In,Ga)Se2 Thin-Films and Its Effect on Absorber Physical Properties

Miguel Contreras 1
1 NCPV, NREL, Golden, Colorado, United States

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Y7: Contacts and Interfaces
Session Chairs
Dieter Bonnet
Miguel Contreras
Thursday PM, April 12, 2007
Room 2024 (Moscone West)

11:45 AM - Y7.7
High Infra-red Transparency CdTe Cells with a CuxTe/SWCNT Back Contact.

Teresa Barnes 1 , Xuanzhi Wu 1 , Jie Zhou 1 , Anna Duda 1 , Garry Rumbles 1 , Timothy Coutts 1 , Chris Weeks 2 , Igor Levitsky 2 , David Britz 2 , Jorma Peltola 2 , Paul Glatkowski 2
1 , National Renewable Energy Lab, Golden, Colorado, United States, 2 , Eikos, Inc, Franklin, Massachusetts, United States

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Y8: Grain Boundaries and Inhomogeneities I
Session Chairs
Malgorzata Igalson
Susanne Siebentritt
Thursday PM, April 12, 2007
Room 2024 (Moscone West)

12:00 PM - Y8.1
Microscopic Investigation of the CdS Buffer Layer Growth on Cu(In, Ga)Se2 Absorbers

Sascha Sadewasser 1 , Wolfgang Bremsteller 1 , Thilo Plake 1 , Christian Kaufmann 1 , Christian Pettenkofer 1
1 , Hahn-Meitner Institut, Berlin Germany

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Y12: Poster Session II
Session Chairs
Ken Durose
Friday AM, April 13, 2007
Salon Level (Marriott)

12:00 PM - Y13.7
Chemical and Electronic Properties of the Front and Back Surfaces of Chalcopyrite Thin Film Solar Cell Absorbers.

Marcus Bar 1 , Shiro Nishiwaki 2 , Sujitra Pookpanratana 1 , Lothar Weinhardt 1 , Timo Hofmann 1 , William Shafarman 2 , Clemens Heske 1
1 Chemistry, University of Nevada, Las Vegas, Las Vegas, Nevada, United States, 2 Institute of Energy Conversion, University of Delaware, Newark, , Delaware, United States

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Y8: Grain Boundaries and Inhomogeneities I
Session Chairs
Malgorzata Igalson
Susanne Siebentritt
Thursday PM, April 12, 2007
Room 2024 (Moscone West)

12:15 PM - Y8.2
Impact of Nonuniformities on Thin Cu(In,Ga)Se2 Solar Cell Performance.

Ana Kanevce 1 , James Sites 1
1 Physics Department, Colorado State University, Fort Collins, Colorado, United States

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Y12: Poster Session II
Session Chairs
Ken Durose
Friday AM, April 13, 2007
Salon Level (Marriott)

12:15 PM - Y13.8
Tailoring the Work Function of Chalcopyrite Thin Films with Self-assembled Monolayers of Thiols.

Sebastian Lehmann 1 , David Fuertes Marrón 1 , Iver Lauermann 1 , Marcus Bär 2 , Harry Mönig 1 , Christian-Herbert Fischer 1 3 , Martha Ch. Lux-Steiner 1 3
1 solar energy research, Hahn-Meitner Institut Berlin, Berlin Germany, 2 Department of Chemistry, University of Nevada Las Vegas, Las Vegas, Nevada, United States, 3 , Freie Universität Berlin, Berlin Germany

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Y8: Grain Boundaries and Inhomogeneities I
Session Chairs
Malgorzata Igalson
Susanne Siebentritt
Thursday PM, April 12, 2007
Room 2024 (Moscone West)

12:30 PM - Y8.3
Analysis of Band Gap Fluctuations in Cu(In,Ga)Se2 by Confocal Optical Transmission and Photoluminescence

Levent Gutay 1 , Gottfried Bauer 1
1 Institute of Physics, University of Oldenburg, Oldenburg Germany

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Y12: Poster Session II
Session Chairs
Ken Durose
Friday AM, April 13, 2007
Salon Level (Marriott)

12:30 PM - Y13.9
Pressure Dependent Rapid Thermal Processing of CuInS2 Thin Films Investigated by in-situ Energy Dispersive X-ray Diffraction.

Immo Kotschau 1 , Humberto Rodriguez-Alvarez 1 , Alfons Weber 1 , Cornelia Streeck 1 , Manuela Klaus 2 , Ingwer Denks 2 , Jens Gibmeier 2 , Christoph Genzel 2 , Hans-Werner Schock 1
1 SE 3, Hahn-Meitner-Institute, Berlin Germany, 2 SF 2, Hahn-Meitner-Institute, Berlin Germany

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Y8: Grain Boundaries and Inhomogeneities I
Session Chairs
Malgorzata Igalson
Susanne Siebentritt
Thursday PM, April 12, 2007
Room 2024 (Moscone West)

12:45 PM - Y8.4
Device Performance Mapping in Cu(In,Ga)Se2 Thin Film Solar Cells

Jehad AbuShama 1 , John Tuttle 1
1 , DayStar Technologies, Inc., HalfMoon, New York, United States

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Y12: Poster Session II
Session Chairs
Ken Durose
Friday AM, April 13, 2007
Salon Level (Marriott)

12:45 PM - Y13.10
Hole Photocarrier Drift Mobility Measurements in CuInxGax-1 Se2 Solar Cells

Steluta Dinca 1 , Brian Egaas 2 , Rommel Noufi 2 , Eric Schiff 1 , William Shafarman 3 , David Young 2
1 Department of Physics, Syracuse University, Syracuse, New York, United States, 2 , National Renewable Energy Laboratory, Golden, Colorado, United States, 3 , Institute of Energy Conversion-University of Delaware, Newark, Delaware, United States

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Y9: Grain Boundaries and Inhomogeneities II
Session Chairs
Malgorzata Igalson
Susanne Siebentritt
Thursday PM, April 12, 2007
Room 2024 (Moscone West)

2:30 PM - Y9.1
Can Grain Boundaries Improve the Performance of Cu(In,Ga)Se2 Solar Cells?

Kurt Taretto 1 , Uwe Rau 2
1 Departamento de Electrotecnia, Universidad Nacional del Comahue, Neuquén Argentina, 2 Inst. Phys. Electron., University Stuttgart, Stuttgart Germany

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2:45 PM - Y9.2
On Coincidence Site Lattice Modelling of Twins in the Sphalerite and Chalcopyrite Structures.

Ken Durose 1
1 Department of Physics, Durham University, Durham United Kingdom

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3:00 PM - Y9.3
Preferred Orientation, Grain Sizes and Grain Boundaries of Chalcopyrite Thin Films.

Daniel Abou-Ras 1 , Melanie Nichterwitz 1 , Christian Kaufmann 1 , Susan Schorr 1 , Hans-Werner Schock 1
1 Solar Energy Division, Hahn-Meitner-Institut GmbH, Berlin Germany

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3:15 PM - Y9.4
A Neutral Barrier at CGS Grain Boundaries – Compositional and Structural Dependencies.

Michael Hafemeister 1 , Susanne Siebentritt 1 , Sascha Sadewasser 1 , Martha Ch. Lux-Steiner 1
1 , Hahn-Meitner-Institut, Berlin Germany

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3:30 PM - Y9
BREAK

Y10: Structural, Optical, and Electronic Characterization I
Session Chairs
Robert Collins
Sylvain Marsillac
Thursday PM, April 12, 2007
Room 2024 (Moscone West)

4:00 PM - Y10.1
Real-time Investigations on the Formation of Cu(In,Ga)Se2 While Annealing Precursors Produced with a Combination of Sputtering and Thermal Evaporation.

Stefan Jost 1 , Frank Hergert 1 , Rainer Hock 1 , Michael Purwins 2 , Markus Schmid 2
1 Chair for Crystallography and Structural Physics, University of Erlangen-Nürnberg, Erlangen Germany, 2 Crystal Growth Laboratory, Department of Materials Science VI, University of Erlangen-Nürnberg, Erlangen Germany

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4:15 PM - Y10.2
Real Time Spectroscopic Ellipsometry of Magnetron Sputtered CdTe, CdS, and CdSxTe1-x Thin Films: Nucleation, Coalescence, and Optical Properties.

Jian Li 1 , Jie Chen 1 , Robert Collins 1
1 Physics and Astronomy, University of Toledo, Toledo, Ohio, United States

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Y11: Discussion Session II: Optimizing Thin Film Solar Cells: are We Really in Control?
Session Chairs
Brian McCandless
William Shafarman
Thursday PM, April 12, 2007
Room 2024 (Moscone West)

9:00 PM - Y12.1
The Effect of Ionizing Radiations on the Structural, Electrical and Optical Properties of AII-BVI Polycrystalline Thin Films Used as Solar Cell Materials.

Lucian Ion 1 , Vlad-Andrei Antohe 1 , Oana Ghenescu 1 , Marian Ghenescu 1 , Stefan Antohe 1
1 Faculty of Physics, University of Bucharest, Bucharest-Magurele Romania

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9:00 PM - Y12.10
Influence of Metal Impurity Defects on the Electrical and Optical Properties of ITO Films on the PEN Substrates.

Hauk Han 1 , Terry Alford 1 2
1 Scool of Materials, Arizona State University, Tempe, Arizona, United States, 2 Flexible Display Center, Arizona State University, Tempe, Arizona, United States

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9:00 PM - Y12.12
Role of Sodium Fluoride in Cu-poor CIGS2 Thin Film Solar Cells.

Parag Vasekar 1 , Neelkanth Dhere 1
1 , Florida Solar Energy Center, Cocoa, Florida, United States

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9:00 PM - Y12.13
The Effects of Sodium on the Properties of CIGSeS Thin Film Solar Cells.

Vinaykumar Hadagali 1 , Neelkanth Dhere 1
1 PV Materials Laboratory, Florida Solar Energy Center / University of Central Florida, Cocoa, Florida, United States

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9:00 PM - Y12.14
Bandgap Engineering in In2S3 Thin Films by Tin Mixing.

Meril Mathew 1 , C. Sudha Kartha 1 , Kandathil Vijaykumar 1 , John Elgin 2 , Parameswar Hari 2
1 Department of Physics, Cochin University of Science and Technology, Kochi, Kerala, India, 2 Physics and Engineering Physics, University of Tulsa, Tulsa, Oklahoma, United States

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9:00 PM - Y12.15
Characteristics of ZnO:Al Thin Films Prepared by RF Magnetron Sputtering Method.

Jihoon Kim 1 , Junje Seong 1 , Uiseok Jung 1 , A Ryoung Lee 1 , Hajong Bong 1 , Young Min Lee 1 , Deuk Young Kim 1 , Sejoon Lee 2
1 semiconductor science, Dongguk university, Seoul Korea (the Republic of), 2 Industrial Science, University of Tokyo , Tokyo Japan

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9:00 PM - Y12.16
Kinetics of Charge Trapping and Emission in CIGS Solar Cells.

Aleksander Urbaniak 1 , Malgorzata Igalson 1 , Marika Edoff 2
1 Faculty of Physics, Warsaw University of Technology, Warsaw Poland, 2 Ångström Solar Center, Uppsala University, Uppsala Sweden

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9:00 PM - Y12.18
CuGaSe2 Related Defect-chalcopyrites: Which Structure is the Right One and Do They Limit the Performance of the CuGaSe2 Based Devices?

Sebastian Lehmann 1 , David Fuertes Marrón 1 , Gerald Wagner 2 , Michael Tovar 3 , Yvonne Tomm 2 , Sebastian Fiechter 2 , Ernest Arushanov 4 , Thomas Schedel-Niedrig 1 , Martha Ch. Lux-Steiner 1 5
1 solar energy research, Hahn-Meitner Institut Berlin, Berlin Germany, 2 Department of Chemistry and Mineralogy, University of Leipzig, Leipzig Germany, 3 structural research, Hahn-Meitner Institut Berlin, Berlin Germany, 4 Institute of Applied Physics , Academy of Sciences of Moldova, Chisinau Moldova (the Republic of), 5 , Freie Universität Berlin, Berlin Germany

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9:00 PM - Y12.19
Electron Spin Resonance and Ultra Violet (UV) Photoluminescence of Ge Implanted CuGaSe2 Thin Films Prepared by the CCSVT (Chemical Close-spaced Vapor Transport) Technique.

Serge Doka 1 , Jasmin Hofstetter 1 , Marin Rusu 1 , Ernest Arushanov 1 2 , Norbert Fabre 3 , Klaus Lips 4 , Thomas Schedel- Niedrig 1 , Martha Lux- Steiner 1
1 SE2, Hahn-Meitner-Institut, Glienicker Str. 100, D- 14109 Berlin Germany, 2 , Institute of Applied Physics, Academy of Sciences, Academiei 5, Chisinau 277028 Moldova (the Republic of), 3 , LAAS- CNRS, 7 Avenue du Colonel Roche, 31077 Toulouse Cedex 4 France, 4 SE1, Hahn-Meitner-Institut, Kékuléstrasse 5, D- 12489 Berlin Germany

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9:00 PM - Y12.2
Characterisation of Thin Films CuInxAl1-xSe2 Prepared by Selenisation of Magnetron Sputtered Metallic Precursors

Guillaume Zoppi 1 , Ian Forbes 1 , Paresh Nasikkar 1 , Robert Miles 1
1 Northumbria Photovoltaics Applications Centre, Northumbria University, Newcastle upon Tyne United Kingdom

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