Laser-induced Modifiable Dual-wavelength Emissions from Lead Halide Perovskite Alloy Microcrystal

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Yu Wu
  • Xia Shen
  • Qihang Lv
  • Qian Yang
  • Da Liu
  • Zhaohui Shan
  • Pengfei Guo

Detail(s)

Original languageEnglish
Article number2200680
Journal / PublicationAdvanced Materials Interfaces
Volume9
Issue number27
Online published29 Aug 2022
Publication statusPublished - 22 Sept 2022

Abstract

Due to the tunable bandgaps, high quantum efficiency, and long carrier diffusion length, perovskites have attracted significant attention as active materials for solar cells, nanoscale lasers, photodetectors, and light-emitting diodes. Herein, laser-induced dual-wavelength emissions from the CsPbBr3xI3(1–x) perovskite alloy microcrystals are reported. Under a 375 nm laser illumination, the micro-photoluminescence (PL) emission spectra of these microcrystals exhibit two emission bands at 570 and 690 nm with gradually increased and decreased PL intensity, respectively. Moreover, the time-dependent emission wavelength of the two emission bands almost has no changes, while the PL intensity of both emission bands shows periodic fluctuations with the on–off switching of excitation light. This dual-wavelength emission phenomenon suggests that phase segregation occurs in these perovskite microcrystals during laser illumination. These results would provide valuable design guidelines for perovskites-based tunable nanophotonic devices and multi-color displays.

Research Area(s)

  • alloy microcrystals, dual-wavelength emissions, laser-induced modulation, lead halide perovskite, nanophotonic, INDUCED PHASE SEGREGATION, LIGHT, PERFORMANCE, NANOCRYSTALS, LENGTHS, IMPACT

Citation Format(s)

Laser-induced Modifiable Dual-wavelength Emissions from Lead Halide Perovskite Alloy Microcrystal. / Wu, Yu; Shen, Xia; Lv, Qihang et al.
In: Advanced Materials Interfaces, Vol. 9, No. 27, 2200680, 22.09.2022.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review