Bulletin of the American Physical Society
2023 APS March Meeting
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session D45: Energy - Photovoltaics and Photonics
3:00 PM–5:36 PM,
Monday, March 6, 2023
Room: Room 315
Sponsoring
Unit:
GERA
Chair: Cheng-Wei Lee, Colorado School of Mines
Abstract: D45.00005 : In-situ buried interface passivation enables efficient and stable inverted perovskite solar modules*
3:48 PM–4:00 PM
Presenter:
Virginia Carnevali
(École Polytechnique Fédérale de Lausanne)
Authors:
Virginia Carnevali
(École Polytechnique Fédérale de Lausanne)
Li Lin
(Huazhong University of Science and Technology)
Mingyang Wei
(École Polytechnique Fédérale de Lausanne)
Nikolaos Lempesis
(École Polytechnique Fédérale de Lausanne)
Lorenzo Agosta
(École Polytechnique Fédérale de Lausanne)
Mathias Dankl
(École Polytechnique Fédérale de Lausanne)
Michael Graetzel
(École Polytechnique Fédérale de Lausanne)
Ursula Roethlisberger
(École Polytechnique Fédérale de Lausanne)
Collaboration:
We thank the Analytical and Testing Center from HUST and the Center for Nanoscale Characterization and Devices (CNCD) from WNLO (HUST) for the facility support of sample measurements.
Scaling-up perovskite solar cells (PSCs) is a prerequisite to the adoption of perovskite photovoltaics. However, the performance and stability of perovskite solar modules (PSMs) have lagged behind those of lab-scale PSCs. The development o PSMs requires interfacial passivation, yet this is challenging for the buried interface, owing to the dissolution of passivation agents during perovskite deposition. Here, we overcome this limitation with in-situ buried interface passivation – achieved via directly adding a cyanoacrylic acid-based molecular additive, namely BT-T, into the perovskite precursor solution. Classical and ab-initio molecular dynamics (MD) simulations reveal that BT-T spontaneously self-assembles at the buried interface during perovskite film formation. The preferential buried interface passivation results in facilitated hole transfer and suppressed surface recombination. In addition, residual BT-T molecules in the perovskite layer enhance its stability and homogeneity. We report a power-conversion efficiency (PCE) of 20.3% for inverted-structure PSMs. The encapsulated PSM retains 92.5% of its initial PCE (20.2%) following 1817 h maximum power point (MPP) tracking under light illumination at 65 °C, corresponding to a T80 (time to 80% of initial PCEs) of 4500 h. Our demonstration of operating-stable PSMs under accelerated ageing represents a step closer to the commercialization of this emerging technology.
*Swiss National Science Foundation Grant No. 200020-185092 and the NCCR-MUST for funding as well as computational resources from the Swiss National Computing Centre CSCS. National Natural Science Foundation of China (21875081, 91733301, 52172200, and 51972251), the Chinese National 1000-Talent-Plan program, the Foundation of State Key Laboratory of Coal Conversion (Grant No. J18-19-913), and the Frontier Project of the Application Foundation of Wuhan Science and Technology Plan Project (2020010601012202)
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