物理化学学报2024，Vol.40Issue(11)：25-26,2.DOI:10.3866/PKU.WHXB202402006
六氯锡酸铵促进钙钛矿太阳能电池界面电子转移及其飞秒瞬态吸收光谱研究
Accelerated Interfacial Electron Transfer in Perovskite Solar Cell by Ammonium Hexachlorostannate Modification and fs-TAS Investigation
摘要
Abstract
Organic-inorganic halide perovskite solar cells(PSCs)have received widespread attention due to their outstanding photovoltaic performance and straightforward preparation process.However,charge recombination at the interface is a crucial factor limiting further enhancement of the power conversion efficiency(PCE)of the PSCs.In this study,we report the interfacial modification between the electron transport layer and the perovskite film(PSK)using ammonium hexachlorostannate(AH)crystals synthesized via the room temperature spin-coating method.AH as an inorganic tin-based perovskite material,can passivate defects in the PSK and establish a better lattice match,thereby enhancing the quality and crystallinity of the PSK.Kelvin probe force microscopy results confirm that AH promotes the directional migration of photogenerated electrons.Femtosecond transient absorption spectroscopy results verify that AH effectively shortens the lifetime of electron extraction and facilitates interfacial electron transfer.Based on the benefits of AH modification,AH-based PSCs exhibit higher PCE and reduced hysteresis effect.关键词
界面修饰/晶格匹配/飞秒瞬态吸收光谱/电子转移动力学/电子动力学Key words
Interface modification/Lattice matching/Femtosecond transient absorption spectra/Electron transfer kinetics/Electron dynamics分类
化学引用本文复制引用
刘纪舟,艾陈斌,胡晨睿,程蓓,张建军..六氯锡酸铵促进钙钛矿太阳能电池界面电子转移及其飞秒瞬态吸收光谱研究[J].物理化学学报,2024,40(11):25-26,2.基金项目
This work was supported by the National Natural Science Foundation of China(52073223,22278324,52202375),Natural Science Foundation of Hubei Province of China(2022CFA001). 国家自然科学基金(52073223,22278324,52202375)以及湖北省自然科学基金(2022CFA001)资助 （52073223,22278324,52202375）
