期刊
ACS APPLIED MATERIALS & INTERFACES
卷 13, 期 14, 页码 16952-16958出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c21824
关键词
perovskite; femtosecond laser direct writing; polygonal microcavities; whispering gallery mode; near-infrared microlasers
资金
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDA25040201]
- National Natural Science Foundation of China [51727901]
- Natural Science Foundation of Hubei Province, China [2018CFA021, 2019AAA020]
- Fundamental Research Funds for the Central Universities [2042018kf0207, 2042019kf0011]
- Wuhan Science and Technology Project of China [2019010701011420]
Organic-inorganic halide perovskites exhibit excellent properties in WGM cavities, but the performance of perovskite-based microlasers is limited by the fabrication of microcavities. Researchers have developed a reproducible method combining thermal co-evaporation and femtosecond laser direct writing to create FAPbI(3) polygon-shaped WGM microcavities, and systematically investigated the size- and shape-dependent WGM lasing performances. The results show that FAPbI(3) polygonal microcavities have great potential as promising WGM lasers for practical optoelectronic applications.
Organic-inorganic halide perovskites have excellent intrinsic properties, such as long carrier lifetime, high photoluminescence quantum yield, and high gain, in whispering gallery mode (WGM) cavities by facile vapor self-assembly or solution process, which make them competitive for high-performance microlasers. However, the performance of perovskite-based microlasers is severely limited by the fabrication of microcavities, which results in poor reproducibility and uncontrolled morphology. Herein, we explore a reproducible method which combined thermal co-evaporation with femtosecond (fs) laser direct writing for formamidinium lead iodide (FAPbI(3)) perovskite polygon-shaped WGM microcavities. The microlasers pumped with the fs laser had a low threshold of 4.0-12.3 mu J/cm(2) and narrow full width at half-maximum of 0.62-1.05 nm. Moreover, size- and shape-dependent WGM lasing performances are also investigated systematically. The results prove that FAPbI(3) polygonal microcavities can serve as promising WGM lasers and have great potential for practical optoelectronic applications.
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