Bandgap-universal passivation enables stable perovskite solar cells with low photovoltage loss

• 成果类型: Article
• 署名作者: Lin, Yen-Hung; Yang, Fengning; Cao, Xue-Li; Dasgupta, Akash; Oliver, Robert D. J.; Ulatowski, Aleksander M.; McCarthy, Melissa M.; Shen, Xinyi; Yuan, Qimu; Christoforo, M. Greyson; Yeung, Fion Sze Yan; Johnston, Michael B.; Noel, Nakita K.; Herz, Laura M.; Islam, M. Saiful; Snaith, Henry J.
• 署名单位: University of Oxford; Hong Kong University of Science & Technology; Hong Kong University of Science & Technology; University of Oxford; University of Sheffield
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-13654
• DOI: 10.1126/science.ado2302
• 发表日期: 2024-05-17
• 页码: 767-775
• 关键词: total-energy calculations; exciton binding-energy; lead iodide; effective masses; efficient; STABILITY; photoluminescence; degradation; operation; films

摘要

The efficiency and longevity of metal-halide perovskite solar cells are typically dictated by nonradiative defect-mediated charge recombination. In this work, we demonstrate a vapor-based amino-silane passivation that reduces photovoltage deficits to around 100 millivolts (>90% of the thermodynamic limit) in perovskite solar cells of bandgaps between 1.6 and 1.8 electron volts, which is crucial for tandem applications. A primary-, secondary-, or tertiary-amino-silane alone negatively or barely affected perovskite crystallinity and charge transport, but amino-silanes that incorporate primary and secondary amines yield up to a 60-fold increase in photoluminescence quantum yield and preserve long-range conduction. Amino-silane-treated devices retained 95% power conversion efficiency for more than 1500 hours under full-spectrum sunlight at 85 degrees C and open-circuit conditions in ambient air with a relative humidity of 50 to 60%.