1. Wavelength tunable single-mode lasing from cesium lead halide perovskite microwires.
- Author
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Li, Fangtao, Yang, Zheng, Jiang, Mingming, Wang, Chunfeng, Xi, Jianguo, Zhang, Yufei, Pan, Caofeng, Lu, Junfeng, and Wang, Rongming
- Subjects
CESIUM compounds ,LEAD halides ,CESIUM ,WHISPERING gallery modes ,PHOTOELECTRIC devices ,QUANTUM efficiency - Abstract
Cesium lead halide perovskites have shown great potential applications in photoelectric devices because of their high quantum efficiency, good stability, and tunable bandgap. Herein, we prepared CsPbBr
3 microwires with a high crystal quality, smooth surface, and rectangular cross section via the solution method. The as-prepared microwires presented a high quality whispering gallery mode lasing with a low threshold of 9.1 μJ cm−2 and a high quality factor of ∼3000. Furthermore, we obtained the alloys of CsPbClx Br3−x (0 < x < 2) microwires through the gas-phase anion exchange method and realized the wavelength tunable single-mode lasing emission ranging from ∼546.8 nm to ∼468.0 nm. This work will expand the practical application of lead halide perovskites in spectrograph, optical communication, and in-chip photoelectric devices. [ABSTRACT FROM AUTHOR]- Published
- 2021
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