钙钛矿(结构)
材料科学
退火(玻璃)
相(物质)
光电子学
带隙
纳米技术
化学工程
化学
复合材料
有机化学
工程类
作者
Haoliang Wang,Yiyi Pan,Xiaoguo Li,Zejiao Shi,Xin Zhang,Teng Shen,Yang Tang,Wenyong Fan,Yuchen Zhang,Fengcai Liu,Yaxin Wang,Kai Li,Yanyan Wang,Chongyuan Li,Tianxiang Hu,Liangliang Deng,Jiao Wang,Anran Yu,Hongliang Dong,Yingguo Yang,Lei Xue,Lei Shi,Yiqiang Zhan
出处
期刊:ACS energy letters
[American Chemical Society]
日期:2022-09-01
卷期号:7 (10): 3187-3196
被引量:18
标识
DOI:10.1021/acsenergylett.2c01453
摘要
Quasi-2D perovskites have attracted extensive attention due to their extraordinary stability compared to their 3D counterparts. Presently, the bottleneck in quasi-2D perovskite solar cells is their relatively low efficiency. The intrinsic interior carrier transport in the perovskite layer consisting of disorderly oriented phases and inadequate optimization of interfacial carrier transfer have greatly limited the overall device performance. A comprehensive study on effective phase manipulation in the BA2MA4Pb5I16 (n = 5) quasi-2D perovskites is presented to pursue optimal efficiency. With the assistance of the solvent DMSO in a constant thermal-annealing spin-coating (CTAS) process, the crystalline growth process in the quasi-2D perovskite film is effectively manipulated and delicate energy band alignment by eliminating the n ≤ 2 phases at the bottom surface has been successfully achieved. Consequently, a significant improvement of carrier transport in the perovskite layer and photogenerated hole extraction at the interface has been accomplished. The champion device exhibited a boosted PCE of 17.66%.
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