硒化镉量子点与C_(60)间的光致电子转移动力学研究  

Dynamics of photoinduced electron transfer between CdSe quantum dots and C_(60)

作　　者：余文静 苏禹铭 何玉韩[1] 刘晓琳 宁倩倩 汪骋 王朝晖[1] YU Wenjing;SU Yuming;HE Yuhan;LIU Xiaolin;NING Qianqian;WANG Cheng;WANG Zhaohui*(State Key Laboratory of Physical Chemistry of Solid Surfaces,Key Laboratory of Spectrochemical Analysis & Instrumentation,Ministry of Education,College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,China)

机构地区：[1]厦门大学化学化工学院,固体表面物理化学国家重点实验室,谱学分析与仪器教育部重点实验室,福建厦门361005

出　　处：《厦门大学学报（自然科学版）》2022年第1期25-32,共8页Journal of Xiamen University：Natural Science

基　　金：国家重点研发计划(2016YFA0200702);国家自然科学基金创新研究群体科学基金(21521004)。

摘　　要：结合稳态和时间分辨光谱技术,研究了CdSe量子点与富勒烯C_(60)构成的模型太阳能电池体系中,荧光发射猝灭以及基态漂白恢复的动力学过程,发现二者间的荧光猝灭是由CdSe量子点与C_(60)间的光致电子转移所引起的,并且电子转移的速率随着量子点粒径的增大而减小:4.3×10^(9)s^(-1)(3.0 nm),1.1×10^(9)s^(-1)(3.5 nm),0.60×10^(9)s^(-1)(4.0 nm).该结果为设计、构筑以CdSe量子点为中心的光电转化体系,以及提高其光电转化效率提供了实验依据.In this study,fluorescence quenching and ground state bleaching dynamics of CdSe quantum dots(QDs)and C_(60)mixture as model solar cell are investigated with steady state and time-resolved spectroscopy.The fluorescence quenching results from the photoinduced electron transfer between the CdSe QDs and C_(60).The electron transfer rate decreases with the diameter of QD,4.3×10^(9)s^(-1)for 3.0 nm QD,1.1×10^(9)s^(-1)for 3.5 nm QD,and 0.60×10^(9)s^(-1)for 4.0 nm QD,respectively.These results provide useful experiment data for improving the photoelectric conversion efficiency and development of high efficient CdSe QD-based solar cells.

关 键 词：瞬态吸收光谱 量子点 富勒烯 电子转移动力学 

分 类 号：O657.38[理学—分析化学]