Crystallization regulation and luminescence optimization in a dual-phase glass incorporating Cs2MnBr4 and Tm3+:NaYbF4

Authors:
  • XLXiaoyan Li
    Xiaoyan Li
  • JHJinquan Hong
    Jinquan Hong
  • JLJiangquan Lv
    Jiangquan Lv
  • YHYouping Huang
    Youping Huang
  • SGShanxin Guo
    Shanxin Guo
  • JHJiangbo Huang
    Jiangbo Huang
  • MZMingzhu Zhao
    Mingzhu Zhao
  • YYYunlong Yu
    Yunlong Yu
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Abstract
Lead-based halide perovskite nanocrystals (PNCs) have emerged as a leading class of materials for optoelectronic applications due to their outstanding optical properties. However, their practical deployment is hindered by concerns regarding lead toxicity. To address this issue, researchers have explored low-toxicity metals as lead substitutes, enabling the development of novel lead-free PNCS. In this work, through targeted compositional engineering of the glass matrix, we simultaneously realize Cs2MnBr4 PNCs-embedded glass and Tm3+:NaYbF4/Cs2MnBr4 dual-phase glass. The introduction of SnO, YbF3, and MnBr2, markedly enhances the 526 nm green emission of Cs2MnBr4 PNCs by simultaneously suppressing Mn2+ oxidation, promoting nucleation, and facilitating crystal growth. Simultaneously, efficient upconversion luminescence (UCL) was observed upon 980 nm near-infrared (NIR) excitation, attributed to the successful doping of Tm3+ into the low-phonon-energy NaYbF4 nanocrytals. The prepared dual-phase glass supports dual-mode optical encoding: green emission from Cs2MnBr4 under UV light and blue UCL from Tm3+:NaYbF4 under 980 nm excitation, enabling advanced anti-counterfeiting.

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