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Li, Xiaolei; Zhong, Xiangli; Hu, Yue; Li, Bochao; Sheng, Yusong; Zhang, Yang; Weng, Chao; Feng, Ming; Han, Hongwei; Wang, Jinbin
The journal of physical chemistry letters, 04/2017, Volume: 8, Issue: 8Journal Article
Lead halide perovskite solar cells have recently emerged as a very promising photovoltaic technology due to their excellent power conversion efficiencies; however, the toxicity of lead and the poor stability of perovskite materials remain two main challenges that need to be addressed. Here, for the first time, we report a lead-free, highly stable C6H4NH2CuBr2I compound. The C6H4NH2CuBr2I films exhibit extraordinary hydrophobic behavior with a contact angle of ∼90°, and their X-ray diffraction patterns remain unchanged even after 4 h of water immersion. UV/vis absorption spectrum shows that C6H4NH2CuBr2I compound has an excellent optical absorption over the entire visible spectrum. We applied this copper-based light absorber in printable mesoscopic solar cell for the initial trial and achieved a power conversion efficiency of ∼0.5%. Our study represents an alternative pathway to develop low-toxic and highly stable organic–inorganic hybrid materials for photovoltaic application.
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