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Robust Ultralong Lead Halide Perovskite Microwire Lasers
Shanshan Yan1, Kaiyang Wang1, Guichuan Xing1
1Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Avenida da Universidade, Taipa 999078, Macau, China.
ACS Applied Materials & Interfaces
|August 5, 2021
Summary
Researchers developed a new method to create millimeter-scale hybrid perovskite microwires for optoelectronics. These microwires exhibit controllable lengths and stable laser performance, paving the way for integrated devices.
Area of Science:
- Materials Science
- Optoelectronics
- Nanotechnology
Background:
- Hybrid organic-inorganic lead halide perovskites are promising for optoelectronic devices.
- Controllable synthesis of millimeter-scale perovskite microwires remains a challenge.
Purpose of the Study:
- To demonstrate a method for synthesizing length-controllable hybrid perovskite microwires.
- To investigate the optoelectronic properties, specifically lasing, of these microwires.
Main Methods:
- Utilizing single-crystal lead bromide (PbBr2) microwires as templates for perovskite growth.
- Employing template-free solution-phase synthesis for methylammonium lead bromide (MAPbBr3) and formamidinium lead bromide (FAPbBr3) microwires.
- Characterizing the microwires for length control, crystal quality, and lasing performance.
Main Results:
- Achieved controllable synthesis of perovskite microwires with lengths from tens to thousands of micrometers.
- Demonstrated Fabry-Perot (FP) lasing in both MAPbBr3 and FAPbBr3 microwires.
- Observed excellent photostability of the microwire lasers over 8 × 10^6 cycles.
Conclusions:
- Solution-converted hybrid lead bromide microwires offer excellent optoelectronic performance.
- The size controllability of this fabrication process is suitable for large-scale production.
- These findings highlight the potential of perovskite microwires for integrated optoelectronic applications.
