Mass production of self-passivated perovskite microlaser particles by solution-phase processing for gas sensors
Yinjuan Ren,
Chunyang Miao,
Likuan Feng,
Ziming Wang,
Shengli Liu,
Peiran Chen,
Yuting Wu,
Yue Wang
Affiliations
Yinjuan Ren
New Energy Technology Engineering Laboratory of Jiangsu Province and Crystal Physics Research Center and School of Science, Nanjing University of Posts and Telecommunications (NJUPT), Nanjing 210023, China
Chunyang Miao
MIIT Key Laboratory of Advanced Display Materials and Devices, College of Materials Science and Engineering, Institute of Optoelectronics and Nanomaterials, Nanjing University of Science and Technology, Nanjing 210094, China
Likuan Feng
MIIT Key Laboratory of Advanced Display Materials and Devices, College of Materials Science and Engineering, Institute of Optoelectronics and Nanomaterials, Nanjing University of Science and Technology, Nanjing 210094, China
Ziming Wang
MIIT Key Laboratory of Advanced Display Materials and Devices, College of Materials Science and Engineering, Institute of Optoelectronics and Nanomaterials, Nanjing University of Science and Technology, Nanjing 210094, China
Shengli Liu
New Energy Technology Engineering Laboratory of Jiangsu Province and Crystal Physics Research Center and School of Science, Nanjing University of Posts and Telecommunications (NJUPT), Nanjing 210023, China
Peiran Chen
New Energy Technology Engineering Laboratory of Jiangsu Province and Crystal Physics Research Center and School of Science, Nanjing University of Posts and Telecommunications (NJUPT), Nanjing 210023, China
Yuting Wu
MIIT Key Laboratory of Advanced Display Materials and Devices, College of Materials Science and Engineering, Institute of Optoelectronics and Nanomaterials, Nanjing University of Science and Technology, Nanjing 210094, China
Yue Wang
MIIT Key Laboratory of Advanced Display Materials and Devices, College of Materials Science and Engineering, Institute of Optoelectronics and Nanomaterials, Nanjing University of Science and Technology, Nanjing 210094, China
Developing mass-productive and high-performance microlaser particles (MLPs) by cost-effective approaches is highly promising for MLP-based optoelectronic applications, which remains a daunting challenge. Herein, we develop a novel solution-phase technique to realize the halide perovskite-based MLPs in a scalable manner. By regulating the dynamic process of crystallization in a two-step spin-coating procedure, the large-scale CsPbBr3 microcrystals are acquired. Importantly, the solution-processed CsPbBr3 microcrystals exhibit much stronger emission than the ones prepared by the chemical vapor deposition method, which is attributed to the low carrier trap density by the formation of a self-passivated and bromine-rich surface. These CsPbBr3 microcrystals with inverted pyramid morphology are demonstrated to support the whispering-gallery mode lasing, featuring low pump threshold and high Q-factor. Moreover, the technologically important single-mode lasing is achieved from the sub-5 μm-sized MLPs, thanks to the superior optical property. Eventually, the laser-emission-based gas sensor is demonstrated. These results represent a significant step toward scalable MLPs and related applications.
