Elucidating the phase transitions and temperature-dependent photoluminescence of MAPbBr3 single crystal

被引：71

作者：

Chen, Cheng ^{[1
,2
]}

Hu, Xiangmin ^{[3
]}

Lu, Wengao ^{[4
]}

Chang, Shuai ^{[5
]}

Shi, Lijie ^{[3
]}

Li, Liang ^{[1
,2
]}

Zhong, Haizheng ^{[5
]}

Han, Jun-Bo ^{[1
,2
]}

机构：

[1] Huazhong Univ Sci & Technol, Wuhan Natl High Magnet Field Ctr, Wuhan 430074, Hubei, Peoples R China

[2] Huazhong Univ Sci & Technol, Dept Phys, Wuhan 430074, Hubei, Peoples R China

[3] Beijing Inst Technol, Sch Phys, 5 Zhongguancun South St, Beijing 100081, Peoples R China

[4] Beijing Inst Technol, Beijing Engn Res Ctr Mixed Real & Adv Display, Sch Optoelect, 5 Zhongguancun South St, Beijing 100081, Peoples R China

[5] Beijing Inst Technol, Sch Mat Sci & Engn, 5 Zhongguancun South St, Beijing 100081, Peoples R China

来源：

JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2018年 / 51卷 / 04期

基金：

中国国家自然科学基金;

关键词：

MAPbBr(3) single crystal; phase transitions; defects related photoluminescence; LIGHT-EMITTING-DIODES; HALIDE PEROVSKITES; SOLUTION GROWTH; QUANTUM DOTS; CH3NH3PBX3; X; QUALITY; BR; EFFICIENCY; PLANE; CL;

D O I：

10.1088/1361-6463/aaa0ed

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We investigated the fundamental properties of MAPbBr(3) single crystal by applying temperature-dependent x-ray diffraction and photoluminescence (PL) measurements from 10 K to 270 K. The structural and spectral analyses illustrate the phase transitions of MAPbBr(3) single crystal from cubic phase (alpha-M APbBr(3)) to tetragonal phases (beta-MAPbBr(3) and gamma-MAPbBr(3)), and then to orthorhombic phase ((delta-MAPbBr(3)) at similar to 230K,similar to 160K and similar to 150K, respectively. The Time-resolved PL results show tliat both free excitons (FE) and bound excitons (BE) have contributions to the PL emissions. The PL at high temperature mainly originates from the BE transitions, while the PL at low temperature ((delta-MAPbBr(3) phase) comes from both BE and FE transitions, and the FE related PL becomes more and more dominant at lower temperatures. The first-principle calculation at zero temperature reveals that the BE-related PL was caused by defects from the anti-site substitution of MA and Br ions.

引用

页数：8

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