钝化
钙钛矿(结构)
盐(化学)
材料科学
化学工程
工程物理
钙钛矿太阳能电池
能量转换效率
太阳能电池
卤化物
光电子学
纳米技术
化学
图层(电子)
物理
物理化学
工程类
作者
Bowen Yang,Jishuan Suo,Edoardo Mosconi,Damiano Ricciarelli,Wolfgang Tress,Filippo De Angelis,Hui‐Seon Kim,Anders Hagfeldt
出处
期刊:ACS energy letters
[American Chemical Society]
日期:2020-09-14
卷期号:5 (10): 3159-3167
被引量:42
标识
DOI:10.1021/acsenergylett.0c01664
摘要
Nonradiative recombination is a major limiting factor in obtaining efficient metal-halide perovskite photovoltaics. Here, a passivation treatment is developed by applying a mixture of a new ammonium salt, CF3(CF2)2CH2NH3I (HBAI), and a conventional formamidinium halide, FAX, on top of the 3D perovskite bulk film. The introduction of such an optimized passivation layer effectively suppressed charge recombination by passivating the surface traps of the 3D perovskite film, enabling a well-matched energy alignment at the interface of perovskite/HTM, leading to a high power conversion efficiency (PCE) of over 23% from current–voltage (I–V) measurements and a stabilized 22.7% PCE, owing to a substantial VOC improvement (above 80 mV on average), coupled with an improved stability.
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