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Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
Published on: February 27, 2017
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Room-temperature high-performance CsPbBr3 perovskite tetrahedral microlasers.
Xiaoxia Wang1, Huazhou Chen, Hong Zhou
1Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, School of Physics and Electronics Science, and College of Materials Science and Engineering, Hunan University, Changsha 410082, P. R. China. Anlian.pan@hnu.edu.cn.
Nanoscale
|January 23, 2019
Summary
Researchers developed a novel tetrahedral cesium lead bromide perovskite microlaser. This high-performance device offers a narrow linewidth and unique three-beam emission, advancing miniaturized laser technology.
Area of Science:
- Materials Science
- Optoelectronics
- Nanotechnology
Background:
- Laser miniaturization is crucial for developing faster, lower-power coherent light sources.
- Microscale cavities with efficient feedback and distinct emission profiles are key for advanced laser performance and functionality.
Purpose of the Study:
- To synthesize well-defined, high-quality tetrahedron-shaped cesium lead bromide perovskite microcavities.
- To realize a room-temperature, high-performance tetrahedral microlaser using these perovskite microcavities.
Main Methods:
- Vapor growth method for synthesizing CsPbBr3 perovskite microcavities.
- Utilizing three-dimensional total internal reflection within the tetrahedral cavity for laser operation.
- Pumping the microlaser via two-photon absorption.
Main Results:
- Achieved a room-temperature tetrahedral microlaser with a narrow linewidth of ~0.3 nm at 538 nm.
- Observed a unique emission profile with three triangularly symmetric beams.
- Demonstrated two-photon absorption pumping with a threshold only 2.5 times higher than one-photon absorption.
Conclusions:
- Successfully fabricated high-quality CsPbBr3 perovskite tetrahedral microcavities and demonstrated a high-performance microlaser.
- The unique emission profile and efficient pumping mechanism enrich the field of microscale lasers.
- Potential applications include optical manipulation, communication, and on-chip beam steering.
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