Ultrafast Antisolvent Growth of Single-Crystal CsPbBr3 Microcavity for Whispering-Gallery-Mode Lasing

Li Zhang; Xinxin Li; Yimeng Song; Bingsuo Zou

doi:10.3390/nano13142116

Ultrafast Antisolvent Growth of Single-Crystal CsPbBr₃ Microcavity for Whispering-Gallery-Mode Lasing

Nanomaterials (Basel). 2023 Jul 20;13(14):2116. doi: 10.3390/nano13142116.

Authors

Li Zhang¹, Xinxin Li², Yimeng Song³, Bingsuo Zou⁴

Affiliations

¹ School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China.
² Key Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
³ Guangdong Provincial Key Laboratory of Electronic Functional Materials and Devices, Huizhou University, Huizhou 516001, China.
⁴ State Key Laboratory of Featured Metal Materials and Life-Cycle Safety for Composite Structures, Guangxi Key Laboratory of Processing for Nonferrous Metals and Featured Materials, School of Resources, Environments and Materials, Guangxi University, Nanning 530004, China.

Abstract

In recent years, all-inorganic cesium lead bromide (CsPbBr₃) perovskites have garnered considerable attention for their prospective applications in green photonics and optoelectronic devices. However, the development of efficient and economical methods to obtain high-quality micron-sized single-crystalline CsPbBr₃ microplatelets (MPs) has become a challenge. Here, we report the synthesis of CsPbBr₃ MPs on Si/SiO₂ substrate by optimizing the ultrafast antisolvent method (FAS). This technique is able to produce well-dispersed, uniformly sized, and morphologically regular tetragonal phase single crystals, which can give strong green emission at room temperature, with excellent stability and excitonic character. Moreover, the crystals demonstrated lasing with a whispering gallery mode with a low threshold. These results suggest that the single-crystalline CsPbBr₃ MPs synthesized by this method are of high optical quality, holding vast potential for future applications in photonic devices.

Keywords: fast growth; lasing; microstructures; perovskites; photonics.

Grants and funding

We thanks the National Natural Science Foundation of China (Grant Nos. 62004218), the Strategic Priority Research Program of Chinese Academy of Sciences (Grant No. XDB33000000) and Youth Innovation Promotion Association CAS.