Phenylalkylamine Passivation of Organolead Halide Perovskites Enabling High-Efficiency and Air-Stable Photovoltaic Cells.

Wang, Feng; Geng, Wei; Zhou, Yang; Fang, Hong-Hua; Tong, Chuan-Jia; Loi, Maria Antonietta; Liu, Li-Min; Zhao, Ni · Adv Mater · 2016

basic_science · Level V

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Abstract

Benzylamine is introduced as a surface passivation molecule that improves the moisture-resistance of the perovskites while simultaneously enhancing their electronic properties. Solar cells based on benzylamine-modified formamidinium lead iodide perovskite films exhibit a champion efficiency of 19.2% and an open-circuit voltage of 1.12 V. The modified FAPbI<sub>3</sub> films exhibit no degradation after >2800 h air exposure.