钝化
钙钛矿(结构)
碘化物
材料科学
能量转换效率
氧化锡
氧化物
结晶度
化学工程
纳米技术
光电子学
化学
无机化学
图层(电子)
兴奋剂
复合材料
冶金
工程类
作者
Chunyan Deng,Jihuai Wu,Yuqian Yang,Yitian Du,Ruoshui Li,Qi Chen,Yuhang Xu,Weihai Sun,Zhang Lan,Peng Gao
出处
期刊:ACS energy letters
[American Chemical Society]
日期:2022-12-22
卷期号:8 (1): 666-676
被引量:31
标识
DOI:10.1021/acsenergylett.2c02378
摘要
Sufficient lead iodide (PbI2) in perovskite films effectively passivates defects and enhances device performance. However, excess large-grained PbI2 clusters tend to be randomly distributed in the perovskite layer, which mitigate the positive effect of the PbI2. Here, we first modulated the distribution and size of PbI2 clusters by functionalizing the buried interface of 4,4′-diaminodiphenyl sulfone hydroiodide (DDSI2). As a multifunctional modifier, DDSI2 can optimize the energy level of tin oxide (SnO2) and passivate the buried interface defects via −NH3+ and S═O functional groups. Moreover, the hydrogen bonding and coordination between DDSI2 and perovskite retard the crystal growth rate and alleviate the lattice stress, thereby improving the quality of the perovskite and modulating the distribution of PbI2. Consequently, the DDSI2-modified device displays a power conversion efficiency of 24.10% and a storage stability of 1800 h. We demonstrate a unique strategy for the rational control of PbI2 for efficient and stable perovskite solar cells.
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