Optical characteristics of self-trapped excitons in 2D (iso-BA)(2)PbI4 perovskite crystals

Li, Haolin1,2; Zhang, Xuanyu2; Wang, Haizhen3,4; Yu, Jiahao2; Li, Kexue1; Wei, Zhipeng1; Li, Dehui3,4; Chen, Rui2

2022-02-01

10.1364/PRJ.444457

Photonics Research   影响因子和分区

2327-9125

Organic-inorganic halide metal perovskites are an exciting class of two-dimensional (2D) materials that have sparked renewed interest for next-generation optoelectronics. In particular, the self-trapped excitons (STEs) in 2D perovskite with excellent optical properties suggest great potential in display and narrowband detection. A prerequisite of understanding STEs' properties is correct identification of the underlying interaction that leads to STEs. Here, the optical properties of STEs in (iso-BA)(2)PbI4 are characterized through laser spectroscopy at various temperatures and excitation intensities. It is found that STEs are related to the octahedral distortion caused by strong electron-phonon interaction. Trapping and detrapping between STEs and free excitons (FEs) are dearly observed. With the increase in temperature, STEs and FEs will gain enough energy and migrate to each other. Moreover, by characterizing the thickness-dependent and two-photon excitation emission, it is confirmed that STEs exist inside the material because of their weak absorption. Our findings are of great significance for not only the fundamental understanding of STEs, but also the design and optimization of 2D-perovskite-based electronic and optoelectronic devices. (C) 2022 Chinese Laser Press

SCI ; EI

英语

其他

Science, Technology and Innovation Commission of Shenzhen Municipality["JCYJ20210324120204011","KQTD2015071710313656"] ; Education Department of Jilin Province[JJKH20200763KJ] ; National Natural Science Foundation of China[11804335,12074045,61704011,61904017,62174079] ; 111 Project of China[D17017]

Optics

Optics

WOS:000750609100042

CHINESE LASER PRESS

20220611608605

Electron-phonon interactions ; Laser excitation ; Laser spectroscopy ; Metal halides ; Optical properties ; Optoelectronic devices ; Perovskite

Minerals:482.2 ; Light/Optics:741.1 ; Optical Devices and Systems:741.3 ; Laser Applications:744.9 ; Physical Chemistry:801.4 ; Chemical Products Generally:804 ; Atomic and Molecular Physics:931.3 ; Quantum Theory; Quantum Mechanics:931.4 ; Solid State Physics:933 ; Optical Variables Measurements:941.4

Web of Science

1.Changchun Univ Sci & Technol, Sch Sci, State Key Lab High Power Semicond Laser, Changchun 130022, Peoples R China
2.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China
3.Huazhong Univ Sci & Technol, Sch Opt & Elect Informat, Wuhan 430074, Peoples R China
4.Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan 430074, Peoples R China

Li, Haolin,Zhang, Xuanyu,Wang, Haizhen,et al. Optical characteristics of self-trapped excitons in 2D (iso-BA)(2)PbI4 perovskite crystals[J]. Photonics Research,2022,10(2):594-600.

Li, Haolin.,Zhang, Xuanyu.,Wang, Haizhen.,Yu, Jiahao.,Li, Kexue.,...&Chen, Rui.(2022).Optical characteristics of self-trapped excitons in 2D (iso-BA)(2)PbI4 perovskite crystals.Photonics Research,10(2),594-600.

Li, Haolin,et al."Optical characteristics of self-trapped excitons in 2D (iso-BA)(2)PbI4 perovskite crystals".Photonics Research 10.2(2022):594-600.