Laser-Induced Secondary Crystallization of CsPbBr3 Perovskite Film for Robust and Low Threshold Amplified Spontaneous Emission

Shi, Yueqing1; Li, Ruxue1,2,3; Yin, Guoxin4; Zhang, Xuanyu1; Yu, Xuanchi1; Meng, Bingheng1,2,3; Wei, Zhipeng3; Chen, Rui1

2022-09-01

10.1002/adfm.202207206

ADVANCED FUNCTIONAL MATERIALS   Impact Factor & Quartile

1616-301X

1616-3028

All-inorganic perovskite nanocrystals (NCs) have received extensive attention for next-generation thin film devices due to their excellent optical properties, such as strong light absorption, high carrier mobility, and defect tolerance. However, significant challenges remain to obtain high-quality perovskite thin films. Herein, a simple but effective post-treatment by laser irradiation for CsPbBr3 NCs thin films is reported. Laser-induced secondary crystallization is observed in CsPbBr3 NCs thin films after treatment. In addition, amplified spontaneous emission (ASE) with a low threshold (5.6 mu J cm(-2)) and a high gain value (743 cm(-1)) is achieved. Based on optical measurements, it is attributed to the low defect density, reduced Auger recombination, and weak exciton-phonon interactions, which greatly suppress the nonradiative recombination channels. The ASE from the film after treatment has a high characteristic temperature (134 K), showing a stable optical gain performance that maintains its intensity for 35 h at room temperature (and 12 h at 40 degrees C). Finally, the proof-of-concept demonstration of graphic coding is shown. This work deepens the understanding of the optical gain mechanism of CsPbBr3 perovskite films and provides a simple and convenient laser treatment that enables the fabrication of high-quality CsPbBr3 perovskite thin films.

laser-induced secondary crystallization nonradiative recombination optical gain perovskite nanocrystals thin films

SCI ; EI

English

NI Journal Papers

First ; Corresponding

National Natural Science Foundation of China[62174079] ; Science, Technology and Innovation Commission of Shenzhen Municipality["JCYJ20210324120204011","KQTD2015071710313656"] ; Natural Science Foundation of Guangxi Province[2021GXNSFBA196088] ; Scientific Research Foundation of Guangxi Education Department[2021KY0345] ; Scientific Research Starting Foundation of Guangxi University of Science and Technology[21Z03]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000850640200001

WILEY-V C H VERLAG GMBH

20223712716767

Bromine compounds ; Lead compounds ; Light absorption ; Nanocrystals ; Optical data processing ; Optical gain ; Perovskite ; Photonic devices ; Spontaneous emission

Minerals:482.2 ; Electromagnetic Waves:711 ; Data Processing and Image Processing:723.2 ; Light/Optics:741.1 ; Optical Devices and Systems:741.3 ; Nanotechnology:761 ; Crystalline Solids:933.1

MATERIALS SCIENCE

Web of Science

1.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China
2.Guangxi Univ Sci & Technol, Sch Microelect & Mat Engn, Liuzhou 545006, Guangxi, Peoples R China
3.Changchun Univ Sci & Technol, Sch Phys, State Key Lab High Power Semicond Laser, Changchun 130022, Jilin, Peoples R China
4.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China

Shi, Yueqing,Li, Ruxue,Yin, Guoxin,et al. Laser-Induced Secondary Crystallization of CsPbBr3 Perovskite Film for Robust and Low Threshold Amplified Spontaneous Emission[J]. ADVANCED FUNCTIONAL MATERIALS,2022.

Shi, Yueqing.,Li, Ruxue.,Yin, Guoxin.,Zhang, Xuanyu.,Yu, Xuanchi.,...&Chen, Rui.(2022).Laser-Induced Secondary Crystallization of CsPbBr3 Perovskite Film for Robust and Low Threshold Amplified Spontaneous Emission.ADVANCED FUNCTIONAL MATERIALS.

Shi, Yueqing,et al."Laser-Induced Secondary Crystallization of CsPbBr3 Perovskite Film for Robust and Low Threshold Amplified Spontaneous Emission".ADVANCED FUNCTIONAL MATERIALS (2022).