MRS Meetings and Events


EN02.14.05 2023 MRS Spring Meeting

Antimony Trichalcogenide Materials for Short-Wavelength Infrared Photovoltaic (SWIR-PV) Devices

When and Where

Apr 14, 2023
9:30am - 9:45am

Moscone West, Level 2, Room 2002



Eran Edri1,Jitendra Kumar1,Yaniv Dror1,Anchal Vashishta1

Ben-Gurion University of the Negev1


Eran Edri1,Jitendra Kumar1,Yaniv Dror1,Anchal Vashishta1

Ben-Gurion University of the Negev1
Coupling a short wavelength infrared (SWIR) PV device with a bandgap of 0.6-0.7 eV to tandem PV technologies can improve overall power conversion efficiency (PCE) by 5-11%. Alternatively, a SWIR device can be used in a thermophotovoltaic system and (ideally) furnish a PCE &gt; 50%. However, there is a limited variety of low-cost light absorbers for the SWIR region. Antimony trichalcogenides, such as Sb<sub>2</sub>Se<sub>3</sub>, exhibit a large absorption coefficient (~10<sup>5</sup>) and a long diffusion length (~1.7 µm). Made of earth-abundant materials and by rapid and low-cost deposition methods, Sb<sub>2</sub>Se<sub>3 </sub>solar cells with PCE &gt; 10% were recently reported. Three other qualities make Antimony trichalcogenides promising SWIR-PV materials: i) Due to the unique quasi-one-dimensional crystal structure, certain grain boundaries in Sb<sub>2</sub>Se<sub>3 </sub>thin films are expected to be electronically benign. ii) due to the antibonding states at the top of the valence band, Sb<sub>2</sub>Se<sub>3 </sub>is expected to be (point) defect tolerant. iii) The bandgap of Sb<sub>2</sub>Se<sub>3</sub> can be tuned to the SWIR region by alloying with Bi. Here we report a method for making thin films and solar cells of Bi-alloyed PV. By using closed space sublimation, we successfully incorporated Bi in Sb<sub>2</sub>Se<sub>3 </sub>up to 40%At. without forming secondary phases. The absorption edge extended from 1050 to 1370 nm. Proof-of-concept solar cells will also be presented.


physical vapor deposition (PVD) | thin film

Symposium Organizers

Eric Colegrove, National Renewable Energy Laboratory
Jessica de Wild, imec
Byungha Shin, Korea Advanced Institute of Science and Technology
Colin Wolden, Colorado School of Mines

Publishing Alliance

MRS publishes with Springer Nature