Ultrafast Terahertz Probes of Charge Transfer and Recombination Pathway of CH_(3)NH_(3)PbI_(3) Perovskites

作     者：Hui-Jie Yan Zhi-Liang Ku Xue-Feng Hu Wan-Ying Zhao Min-Jian Zhong Qi-Biao Zhu Xian Lin Zuan-Ming Jin Guo-Hong Ma 严慧婕;库治良;胡雪峰;赵婉莹;钟敏建;朱绮彪;林贤;金钻明;马国宏

作者机构：Department of PhysicsShanghai UniversityShanghai 200444 State Key Laboratory of Advanced Technology For Materials Synthesis and ProcessingWuhan University of TechnologyWuhan 430070 

出 版 物：《Chinese Physics Letters》 (中国物理快报(英文版))

年 卷 期：2018年第35卷第2期

页      面：111-115页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos 11674213,11604202 and 61735010 the Young Eastern Scholar at Shanghai Institutions of Higher Learning under Grant No QD2015020 the Universities Young Teachers Training Funding Program under Grant No ZZSD15098 the‘Chen Guang’Project of Shanghai Municipal Education Commission and Shanghai Education Development Foundation under Grant No 16CG45 

主　　题：Perovskite 

摘      要：We use transient terahertz photoconductivity measurements to demonstrate that upon optical excitation of CH_(3)NH_(3)PbI_(3)perovskite,the hole transfer from CH_(3)NH_(3)PbI_(3)into the organic hole-transporting material(HTM)Spiro-OMe TAD occurs on a sub-picosecond ***-order recombination is the dominant decay pathway at higher photo-excitation fluences as observed in neat CH_(3)NH_(3)PbI_(3)*** contrast,under similar experimental conditions,second-order recombination weakly contributes the relatively slow recombination between the electrons in the perovskite and the injected holes in HTM,as a loss mechanism at the CH_(3)NH_(3)PbI_(3)/Spiro-OMe TAD *** results offer insights into the intrinsic photophysics of CH_(3)NH_(3)PbI_(3)-based perovskites with direct implications for photovoltaic devices and optoelectronic applications.