Multifunctional Organic Molecule for Defect Passivation of Perovskite for High-Performance Indoor Solar Cells

钝化 材料科学 能量转换效率 结晶 钙钛矿(结构) 堆积 晶界 化学工程 电解质 光电子学 纳米技术 电极 微观结构 化学 复合材料 图层(电子) 有机化学 物理化学 工程类
作者
Chuanshan Tian,Dongxue Liu,Yixin Dong,Yajie Wang,Tinghuan Yang,Yang Yang,Alan Meng,Erxin Zhao,Nan Wu,Zheng Zhang,Ye Yang,Yongshuai Gong,Buyi Yan,Shengxiong Zhang,Lu Zhang,Tianqi Niu
出处
期刊:Materials [Multidisciplinary Digital Publishing Institute]
卷期号:18 (1): 179-179
标识
DOI:10.3390/ma18010179
摘要

Perovskite solar cells (PSCs) can utilize the residual photons from indoor light and continuously supplement the energy supply for low-power electron devices, thereby showing the great potential for sustainable energy ecosystems. However, the solution-processed perovskites suffer from serious defect stacking within crystal lattices, compromising the low-light efficiency and operational stability. In this study, we designed a multifunctional organometallic salt named sodium sulfanilate (4-ABS), containing both electron-donating amine and sulfonic acid groups to effectively passivate the positively-charged defects, like under-coordinated Pb ions and iodine vacancies. The strong chemical coordination of 4-ABS with the octahedra framework can further regulate the crystallization kinetics of perovskite, facilitating the enlarged crystal sizes with mitigated grain boundaries within films. The synergistic optimization effects on trap suppression and crystallization modulation upon 4-ABS addition can reduce energy loss and mitigate ionic migration under low-light conditions. As a result, the optimized device demonstrated an improved power conversion efficiency from 22.48% to 24.34% and achieved an impressive efficiency of 41.11% under 1000 lux weak light conditions. This research provides an effective defect modulation strategy for synergistically boosting the device efficiency under standard and weak light irradiations.
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