Surface reaction for efficient and stable inverted perovskite solar cells.

Autor: Jiang Q; Chemistry and Nanoscience Center, National Renewable Energy Laboratory, Golden, CO, USA., Tong J; Chemistry and Nanoscience Center, National Renewable Energy Laboratory, Golden, CO, USA., Xian Y; Department of Physics and Astronomy and Wright Center for Photovoltaics Innovation and Commercialization, University of Toledo, Toledo, OH, USA., Kerner RA; Chemistry and Nanoscience Center, National Renewable Energy Laboratory, Golden, CO, USA., Dunfield SP; Department of NanoEngineering, University of California San Diego, La Jolla, CA, USA.; Materials Science Center, National Renewable Energy Laboratory, Golden, CO, USA., Xiao C; Materials Science Center, National Renewable Energy Laboratory, Golden, CO, USA., Scheidt RA; Chemistry and Nanoscience Center, National Renewable Energy Laboratory, Golden, CO, USA., Kuciauskas D; Chemistry and Nanoscience Center, National Renewable Energy Laboratory, Golden, CO, USA., Wang X; Department of Physics and Astronomy and Wright Center for Photovoltaics Innovation and Commercialization, University of Toledo, Toledo, OH, USA., Hautzinger MP; Chemistry and Nanoscience Center, National Renewable Energy Laboratory, Golden, CO, USA., Tirawat R; Chemistry and Nanoscience Center, National Renewable Energy Laboratory, Golden, CO, USA., Beard MC; Chemistry and Nanoscience Center, National Renewable Energy Laboratory, Golden, CO, USA., Fenning DP; Department of NanoEngineering, University of California San Diego, La Jolla, CA, USA., Berry JJ; Materials Science Center, National Renewable Energy Laboratory, Golden, CO, USA.; Renewable and Sustainable Energy Institute, University of Colorado Boulder, Boulder, CO, USA.; Department of Physics, University of Colorado Boulder, Boulder, CO, USA., Larson BW; Chemistry and Nanoscience Center, National Renewable Energy Laboratory, Golden, CO, USA., Yan Y; Department of Physics and Astronomy and Wright Center for Photovoltaics Innovation and Commercialization, University of Toledo, Toledo, OH, USA. Yanfa.Yan@utoledo.edu., Zhu K; Chemistry and Nanoscience Center, National Renewable Energy Laboratory, Golden, CO, USA. Kai.Zhu@nrel.gov.
Jazyk: angličtina
Zdroj: Nature [Nature] 2022 Nov; Vol. 611 (7935), pp. 278-283. Date of Electronic Publication: 2022 Sep 01.
DOI: 10.1038/s41586-022-05268-x
Abstrakt: Perovskite solar cells (PSCs) with an inverted structure (often referred to as the p-i-n architecture) are attractive for future commercialization owing to their easily scalable fabrication, reliable operation and compatibility with a wide range of perovskite-based tandem device architectures 1,2 . However, the power conversion efficiency (PCE) of p-i-n PSCs falls behind that of n-i-p (or normal) structure counterparts 3-6 . This large performance gap could undermine efforts to adopt p-i-n architectures, despite their other advantages. Given the remarkable advances in perovskite bulk materials optimization over the past decade, interface engineering has become the most important strategy to push PSC performance to its limit 7,8 . Here we report a reactive surface engineering approach based on a simple post-growth treatment of 3-(aminomethyl)pyridine (3-APy) on top of a perovskite thin film. First, the 3-APy molecule selectively reacts with surface formamidinium ions, reducing perovskite surface roughness and surface potential fluctuations associated with surface steps and terraces. Second, the reaction product on the perovskite surface decreases the formation energy of charged iodine vacancies, leading to effective n-type doping with a reduced work function in the surface region. With this reactive surface engineering, the resulting p-i-n PSCs obtained a PCE of over 25 per cent, along with retaining 87 per cent of the initial PCE after over 2,400 hours of 1-sun operation at about 55 degrees Celsius in air.
(© 2022. The Author(s), under exclusive licence to Springer Nature Limited.)
Databáze: MEDLINE
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