Time-resolved photoluminescence:a precision tool for shallow trap density determination in perovskite films

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外文摘要：Determining the trap density in the absorbing layer thin film of perovskite solar cells is a critically important task,as it directly influences the efficiency of the devices.Here,we proposed time-resolved photoluminescence(TRPL)as a nonde-structive method to assess trap density.A model was constructed to investigate carrier recombination and transition in perovskite materials.The model was utilized for numerical calculations and successfully fitted TRPL signals of perovskite materials.Furthermore,a genetic algorithm was employed to optimize the parameters.Finally,statistical methods were applied to obtain the parameters associated with the trap states of the material.This approach facilitates the successful determination of trap densities for different samples with clear differentiation.

外文关键词：

perovskite solar celltime-resolved photoluminescencegenetic algorithmtrap densitymethylammonium lead triiodide

作者：

陈威、史亦沣、王鹏祥、张国栋、王虎、郑毅帆、邵宇川

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作者单位：

Key Laboratory of Materials for High-Power Laser,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China

School of Material Science and Technology,ShanghaiTech University,Shanghai 201210,China

基金：

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaShanghai Sailing Program

项目编号：

621042345210327921YF1454000

出版年：

2024

DOI：

10.3788/COL202422.084001

中国光学快报(英文版)

中国光学学会中国科学院上海光学精密机械研究所

中国光学快报(英文版)

CSTPCD

影响因子：1.305

ISSN：1671-7694

年,卷(期)：2024.22(8)