英国牛津大学Henry J. Snaith团队报道，带隙通用钝化实现具有低光电压损失稳定钙钛矿太阳能电池。相关研究成果发表在2024年5月17日出版的《科学》。

金属卤化物钙钛矿太阳能电池的效率和寿命，通常由非辐射缺陷介导的电荷复合决定。

该文中，研究人员展示了一种基于蒸汽的氨基硅烷钝化方法，它将带隙在1.6和1.8eV之间的钙钛矿太阳能电池中的光电压缺陷降低到约100mV（>热力学极限的90%），这对串联应用至关重要。伯、仲或叔氨基硅烷单独对钙钛矿结晶度和电荷传输产生负面或几乎没有影响，但结合伯和仲胺的氨基硅烷产生高达60倍的光致发光量子产率，并保持长程导电。

氨基硅烷处理的器件在85°C的全光谱阳光和相对湿度为50-60%的环境空气中的条件下，保持95%的功率转换效率超过1500小时。

附：英文原文

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

Author: Yen-Hung Lin, Vikram, Fengning Yang, Xue-Li Cao, Akash Dasgupta, Robert D. J. Oliver, Aleksander M. Ulatowski, Melissa M. McCarthy, Xinyi Shen, Qimu Yuan, M. Greyson Christoforo, Fion Sze Yan Yeung, Michael B. Johnston, Nakita K. Noel, Laura M. Herz, M. Saiful Islam, Henry J. Snaith

Issue&Volume: 2024-05-17

Abstract: 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°C and open-circuit conditions in ambient air with a relative humidity of 50 to 60%.

DOI: ado2302

Source: https://www.science.org/doi/10.1126/science.ado2302