共轭有机分子自修复效应实现高效稳定FASnI3基钙钛矿太阳能电池（冉晨鑫 Joule, 2019, 3, 3072–3087）DOI: 10.1016/j.joule.2019.08.023
发布时间：2019-10-13
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- 发布时间：
- 2019-10-13
- 文章标题：
- 共轭有机分子自修复效应实现高效稳定FASnI3基钙钛矿太阳能电池（冉晨鑫 Joule, 2019, 3, 3072–3087）DOI: 10.1016/j.joule.2019.08.023
- 内容：
- Conjugated Organic Cations Enable Effificient Self-Healing FASnI3 Solar CellsChenxin Ran, 1 Weiyin Gao, 1 Jingrui Li, 3 Jun Xi, 6 Lu Li, 1 Jinfei Dai, 1 Yingguo Yang, 2 Xingyu Gao, 2 Hua Dong, 1 Bo Jiao, 1 , 4 , 5 Ioannis Spanopoulos, 4 Christos D. Malliakas, 4 Xun Hou, 1 Mercouri G. Kanatzidis, 4 , * and Zhaoxin Wu 1 , 5 , 7 , *The introduction of large-volume amines(LVAs) in Sn-based perovskite fifilms has been shown to lead to promising power conversion effificiency (PCE) in Pb-free perovskite solar cells (PSCs). However, the LVAs adopted so far (e.g., phenylethylammonium [PEA] and butylammonium [BA]) are insulating and could impede charge extraction within the perovskite fifilm. Herein, a conjugated LVA, 3-phenyl-2-propen-1-amine (PPA), is introduced in formamidinium tin iodide (FASnI3) perovskite. Our results show that the incorporation of PPA results in enlarged grain sizes, reduced trap density, preferential orientation, effificient charge extraction, and enhanced structural stability of FASnI3 fifilm. These positive effects help in achieving effificient PSCs with a PCE as high as 9.61% with negligible hysteresis and outstanding stability (remains 92% of its initial PCE value after 1,440 h). Furthermore, the presence of PPA enables a self-healing action of PSCs. Most importantly, we report large-area (1 3 1 cm2) Sn-based PSCs achieving PCE of 7.08%