钙钛矿(结构)
材料科学
微晶
钝化
粒度
退火(玻璃)
钙钛矿太阳能电池
晶界
图层(电子)
盐(化学)
化学工程
能量转换效率
无机化学
卤化物
光电子学
纳米技术
化学
复合材料
冶金
物理化学
微观结构
工程类
作者
Hanhong Zhang,Song Wang,Youzheng Hou,Fan Zhang,Yuying Hao,Jun Song,Junle Qu
出处
期刊:RSC Advances
[The Royal Society of Chemistry]
日期:2021-01-01
卷期号:11 (38): 23249-23258
被引量:11
摘要
Organic-inorganic lead halide perovskite solar cells have shown a rapid increase in power conversion efficiency (PCE) in the past decade. However, their performance still suffers from trap-assisted decline due to defects at the surface and grain boundaries in the polycrystalline active layer. In this study, a thin BAI layer was formed on the CH3NH3PbI3 surface, which was then transformed into either a two-dimensional (2D) perovskite layer (BA2PbI4) or the organic salt itself by controlling the post-annealing process. A variety of characterization results show that the 2D perovskites could effectively reduce the trap-assisted charge recombination and increase the device stability. Therefore, a remarkably enhanced PCE of 20.6% was achieved in the modified inverted perovskite solar cells.
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