The achievement of red upconversion lasing for highly stable perovskite nanocrystal glasses with the assistance of anion modulation

Mengfeifei Jin, Wei Gao, Xiaojuan Liang, Ying Fang, Siufung Yu, Ting Wang, Weidong Xiang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

Abstract

Perovskite materials have received extensive attention as optical gain media. However, it is tough to realize lasing using such materials on account of the unstable structure of MAPbI3/CsPbI3 nanocrystals (NCs), and the propensity for mixed-halogen perovskites to undergo phase decomposition into bromine-rich and iodide-rich regions under intense laser irradiation. To solve this issue, we fabricated CsPbX3 (X = Br, I) NCs, which were embedded into a glassy matrix with high stability. In addition, by doping Br ions into the CsPbI3 NCs to partially replace I ions, the optical efficiency and the optical gain properties were found to be significantly improved. Here, under 800 nm pulse laser excitation, red random lasing was realized with the assistance of such anion modulation. Moreover, we demonstrate that the perovskite NCs glasses (PNG) show strong water stability after immersion in water for one week, seeding a promise for application in high-definition (HD) displays and photonic devices. [Figure not available: see fulltext.].

Original languageEnglish
JournalNano Research
DOIs
Publication statusAccepted/In press - 28 Feb 2021

Keywords

  • nanocrystals glass
  • perovskite
  • random lasing
  • red-emitting

ASJC Scopus subject areas

  • Materials Science(all)
  • Electrical and Electronic Engineering

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