High-Performance Inverted Planar Heterojunction Perovskite Solar Cells Based on Lead Acetate Precursor with Efficiency Exceeding 18%
High-Performance Inverted Planar Heterojunction Perovskite Solar Cells Based on Lead Acetate Precursor with Efficiency Exceeding 18%
复制标题
高性能%20倒置%20平面%20异质结%20钙钛矿%20太阳能%20Cells%20Based%20on%20Lead%20Acetate%20Precursor%20with%20Efficiency%20Exceeding%2018%
DOI：
10.1002/adfm.201601175
复制
发表时间：
2016
影响因子：
19
通讯作者：
Gong Qihuang
中科院分区：
文献类型：
--
作者：
Zhao Lichen;Luo Deying;Wu Jiang;Hu Qin;Zhang Wei;Chen Ke;Liu Tanghao;Liu Yi;Zhang Yifei;Liu Feng;Russell Thomas P.;Snaith Henry J.;Zhu Rui;Gong Qihuang
有机-无机卤化铅钙钛矿是下一代光伏发电的新兴材料。卤化铅是钙钛矿活性层最常用的铅前体。近年来，醋酸铅（Pb(Ac)2）作为传统卤化铅的潜在替代品已显示出其优越性。在这里，我们展示了一种提高基于醋酸铅前驱体的钙钛矿太阳能电池效率的策略。我们将甲基溴铵作为添加剂加入到Pb(Ac)2和甲基碘化铵前驱体溶液中，得到均匀、致密和无针孔的钙钛矿薄膜。我们观察到钙钛矿层和电荷收集层之间的电荷载流子提取增强，并在最大功率点实现了18.3%的功率转换效率和17.6%的稳定输出效率。优化后的器件在扫描条件下具有可忽略不计的电流密度-电压（J-V）迟滞。
Organic–inorganic lead halide perovskites are emerging materials for the next‐generation photovoltaics. Lead halides are the most commonly used lead precursors for perovskite active layers. Recently, lead acetate (Pb(Ac)2) has shown its superiority as the potential replacement for traditional lead halides. Here, we demonstrate a strategy to improve the efficiency for the perovskite solar cell based on lead acetate precursor. We utilized methylammonium bromide as an additive in the Pb(Ac)2and methylammonium iodide precursor solution, resulting in uniform, compact and pinhole‐free perovskite films. We observed enhanced charge carrier extraction between the perovskite layer and charge collection layers and delivered a champion power conversion efficiency of 18.3% with a stabilized output efficiency of 17.6% at the maximum power point. The optimized devices also exhibited negligible current density–voltage (J–V) hysteresis under the scanning conditions.