Charge Carrier Recombination Dynamics in MAPb(BrXCl1-X)3 Single Crystals

被引：3
|
作者：
Xiao, Zijie [1 ]
Tao, Tingting [2 ]
Shu, Jingting [2 ]
Pan, Runhui [1 ]
Dang, Wei [2 ]
Zhao, Ningjiu [3 ]
Pan, Shusheng [1 ,4 ]
Zhang, Wei [4 ,5 ,6 ]
机构：
[1] Guangzhou Univ, Sch Phys & Mat Sci, Guangzhou 510006, Peoples R China
[2] Hebei Univ, Coll Phys Sci & Technol, Hebei Key Lab Opt Elect Informat & Mat, Baoding 071002, Peoples R China
[3] Songshan Lake Mat Lab, Dongguan 523808, Peoples R China
[4] Huangpu Res & Grad Sch Guangzhou Univ, Res Ctr Adv Informat Mat CAIM, Guangzhou 510006, Peoples R China
[5] Guangzhou Univ, Sch Phys & Mat Sci, Guangzhou 510006, Peoples R China
[6] Guangzhou Univ, Guangzhou Univ Linkoping Univ Res Ctr Urban Sustai, Guangzhou 510006, Peoples R China
来源：
JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2023年 / 14卷 / 01期
基金：
中国博士后科学基金;
关键词：
HYBRID PEROVSKITE; HALIDE PEROVSKITES; SURFACE;
D O I：
10.1021/acs.jpclett.2c03606
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Understanding carrier recombination processes in MAPb(BrxCl1-x)3 crystals is essential for their photoelectrical applications. In this work, carrier recombination dynamics in MAPb(BrxCl1-x)3 single crystals were studied by steady-state photoluminescence (PL), time-resolved photoluminescence (TRPL), and time-resolved microwave photoconductivity (TRMC). By comparing TRPL and TRMC, we find TRPL of MAPb(BrxCl1-x)3 (x < 0.98) single crystals is dominated by a hole trapping process while the long-lived component of TRMC is dominated by an electron trapping process. We also find both electron and hole trapping rates of MAPb(BrxCl1-x)3 (x < 0.98) crystals decrease with an increase in Br content. A temperature-dependent PL study shows there are shallow trap states besides the deep level trap states in the MAPb(Br0.82Cl0.18)3 crystal. The activation energy for holes in shallow trap states detrapped into the valence band is -0.1 eV, while the activation energy for free holes to be trapped into deep trap states is -0.4 eV. This work provides insight into carrier recombination processes in MAPb(BrxCl1-x)3 single crystals.
引用
收藏
页码：245 / 252
页数：8
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