MRS Meetings and Events


EN05.10.05 2023 MRS Fall Meeting

Self-Leveling Inks for Engineering Large Area Uniformity in High-Performance Flexography-Printed Perovskite Solar Cells

When and Where

Nov 29, 2023
8:00pm - 10:00pm

Hynes, Level 1, Hall A



Julia Huddy1,William J. Scheideler1

Dartmouth College1


Julia Huddy1,William J. Scheideler1

Dartmouth College1
Solution processing of metal halide perovskites can offer opportunities for efficient roll-based manufacturing of emerging flexible optoelectronic devices such as lightweight photovoltaics and light emitting diodes (LEDs). However, current techniques for perovskite deposition are limited by damaging subtractive scribing steps and lack wide processing windows that offer high uniformity. This work presents a class of self-leveling perovskite inks with specifically engineered viscosity, Marangoni coefficients, and drying rates to ensure ultra-uniformity. We show rapid open-air fabrication of double cation perovskite solar cells (PSCs) using high-speed (60 m/min) flexography, printing films over 500 cm<sup>2</sup> in &lt; 1s with high photoluminescent uniformity (RMS variation &lt; 4 %). Integrating inline N<sub>2</sub> drying, we achieve highly uniform patterns with &lt; 25 µm features and single-micron line edge roughness, ideal for solar module and perovskite LED integration. XRD and SEM reveal the impact of the ink design and anion composition on perovskite crystallization while 2D scanning photoluminescence (PL) resolves a correlation between ink leveling dynamics and optoelectronic quality. This allows us to optimize the self-leveling inks for mitigating Saffman-Taylor instabilities inherent in contact-based ink transfer, leading to enhanced uniformity, higher photovoltaic performance, and improved operational stability. Our flexography printed n-i-p planar PSCs achieve a photovoltaic conversion efficiency &gt; 20 %, the highest reported for PSCs fabricated by roll-based methods. Collectively, these results illustrate how self-leveling inks can broaden process windows for perovskite device manufacturing by healing coating defects rather than freezing non-uniformities that otherwise lead to stability weakpoints.



Symposium Organizers

Marina Leite, University of California, Davis
Lina Quan, Virginia Institute of Technology
Samuel Stranks, University of Cambridge
Ni Zhao, Chinese University of Hong Kong

Symposium Support

Enli Technology Co., LTD

APL Energy | AIP Publishing

Session Chairs

So Min Park
Lina Quan

In this Session

Interstitial Defect Relaxation DFT Study of Lead Halide Perovskites

Water-Assisted Morphology and Crystal Engineering of Hybrid Organic-Inorganic Halide Perovskite: Implications for Optoelectronic Properties

Self-Leveling Inks for Engineering Large Area Uniformity in High-Performance Flexography-Printed Perovskite Solar Cells

Towards Highly Efficient Fully Evaporated Perovskite/Si Tandem Solar Cells

The Outstanding Role of Dielectricity in Hybrid Solar Cell Absorbers

Controlling The Crystallization of Pure Bromide Quasi-2-Dimensional Perovskite Crystals for High Efficiency Pure-Blue Light-Emitting Diodes

Compositional Engineering of Single-Crystal Perovskite for Highly Efficient Photovoltaics

Atomistic Origin of Transparent Absorption Spectra of Halide Perovskites

Exploring a Novel Family of Conjugated Polymers for High Efficiency and Thermally Stable Perovskite Solar Cells

Charge Transfer Doping of Ruddlesden–Popper Metal–Halide Perovskites via Bulk Incorporation of Organic Molecular Dopants

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Publishing Alliance

MRS publishes with Springer Nature