钙钛矿(结构)
制作
锡
碘化物
材料科学
无机化学
化学工程
光电子学
纳米技术
工程物理
化学
冶金
物理
工程类
医学
病理
替代医学
作者
Fengzhu Li,Chaoshen Zhang,Jin‐Hua Huang,Haochen Fan,Huijia Wang,Pengcheng Wang,Chuanlang Zhan,Cai‐Ming Liu,Xiangjun Li,Lian‐Ming Yang,Yanlin Song,Ke‐Jian Jiang
标识
DOI:10.1002/anie.201902418
摘要
Abstract Tin‐based halide perovskite materials have been successfully employed in lead‐free perovskite solar cells, but the overall power conversion efficiencies (PCEs) have been limited by the high carrier concentration from the facile oxidation of Sn 2+ to Sn 4+ . Now a chemical route is developed for fabrication of high‐quality methylammonium tin iodide perovskite (MASnI 3 ) films: hydrazinium tin iodide (HASnI 3 ) perovskite film is first solution‐deposited using presursors hydrazinium iodide (HAI) and tin iodide (SnI 2 ), and then transformed into MASnI 3 via a cation displacement approach. With the two‐step process, a dense and uniform MASnI 3 film is obtained with large grain sizes and high crystallization. Detrimental oxidation is suppressed by the hydrazine released from the film during the transformation. With the MASnI 3 as light harvester, mesoporous perovskite solar cells were prepared, and a maximum power conversion efficiency (PCE) of 7.13 % is delivered with good reproducibility.
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