钝化
钙钛矿(结构)
材料科学
兴奋剂
能量转换效率
开路电压
热稳定性
费米能级
光电子学
电压
纳米技术
化学
图层(电子)
物理
结晶学
电气工程
电子
工程类
量子力学
有机化学
作者
Yuanyi Liu,Tianxing Xiang,Bing Zhang,Jize Wang,Xinxin Yu,Yuzhe Xiao,Junyan Xiao,Zhiliang Ku,Yong Peng
出处
期刊:ACS applied energy materials
[American Chemical Society]
日期:2022-06-23
卷期号:5 (7): 8049-8056
被引量:12
标识
DOI:10.1021/acsaem.2c00506
摘要
Current CsPbBr3 perovskite solar cells still suffer from a high open-circuit voltage (Voc) loss due to the high defect density. Herein, we demonstrate a strategy to passivate defects and induce Fermi level modification through BaI2 doping. The carrier lifetime is significantly extended after adding BaI2. In addition, the Fermi level is changed as Ba2+ enters the crystal lattice, which increases the built-in potential and promotes the transport of carriers. As a result, the optimized thermally evaporated device shows a record Voc of 1.551 V and an improved power conversion efficiency of 10.09% as well as excellent thermal stability.
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