Superior thermally-stable narrow-band green emitter from Mn2+-doped zero thermal expansion (ZTE) material

Wei Wang, Hang Yang, Meiqian Fu, Xinyang Zhang, Mengyu Guan, Yi Wei, Chun Che Lin, Guogang Li

Research output: Contribution to journalArticlepeer-review

Abstract

Thermal quenching is still a pivotal challenge for phosphor materials in white light emitting diodes lighting applications. Herein, we propose an effective strategy to design a near zero-thermal-quenching green emission in zero-thermal-expanding Zn4B6O13 host based on unique 3D isotropic cage structure. The integrated emission intensity of Zn4B6O13:Mn2+ could maintain 103% of initial intensity at 150 °C and 98% at 250 °C under blue light excitation. During the low-frequency vibrations, the unchanged bonds and angles induce the zero thermal expansion, and the unaffected lattice and coordination environment contribute the nearly unchanged emission intensity during the heating process. In addition, an efficient self-reduction of activators in the studied system is ascribed to vacancy and interstitial oxygen defects act as donors to provide electrons. This work initiates a novel strategy to construct thermally-stable and self-reductive phosphors for multiple optical applications.

Original languageEnglish
Article number128979
JournalChemical Engineering Journal
Volume415
DOIs
Publication statusPublished - Jul 1 2021
Externally publishedYes

Keywords

  • 3D isotropic cage structure
  • Narrow band green emission
  • Self-reduction
  • Superior thermal stability
  • Zero thermal expansion

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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