材料科学
卤化物
退火(玻璃)
结晶度
能量转换效率
光伏系统
钙钛矿(结构)
钙钛矿太阳能电池
平面的
光电子学
太阳能电池
涂层
防反射涂料
图层(电子)
化学工程
纳米技术
复合材料
无机化学
化学
计算机科学
电气工程
工程类
计算机图形学(图像)
作者
Jung Hwan Lee,Dongguen Shin,Ryan Rhee,Seok-Heon Yun,Kyung Mun Yeom,Do Hyung Chun,Sunje Lee,Dongho Kim,Yeonjin Yi,Jun Hong Noh,Jae Hyung Park
标识
DOI:10.1021/acs.jpclett.9b02488
摘要
Managing defects in SnO2 is critical for improving the power conversion efficiency (PCE) of halide perovskite-based solar cells. However, typically reported SnO2-based perovskite solar cells have inherent defects in the SnO2 layer, which lead to a lower PCE and hysteresis. Here, we report that a dual-coating approach for SnO2 with different annealing temperatures can simultaneously form a SnO2 layer with high crystallinity and uniform surface coverage. Along with these enhanced physical properties, the dual-coated SnO2 layer shows favorable band alignment with a mixed halide perovskite. After careful optimization of the dual-coating method, the average PCE of the perovskite solar cell based on the dual-coated SnO2 layer increases from 18.07 to 19.23% with a best-performing cell of 20.03%. Note that a facile two-step coating and annealing method can open new avenues to develop SnO2-based perovskite solar cells with stabilized and improved photovoltaic performances.
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