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Fluorescence regulation derived from Eu3+in miscible-order fluoride-phosphate blocky phosphor

  • Jianyang Xiong
  • , Gang Li
  • , Jing Zhang
  • , Desheng Li*
  • , Edwin Yue Bun Pun
  • , Hai Lin*
  • *Corresponding author for this work
  • Dalian Polytechnic University
  • CAS - Dalian Institute of Chemical Physics
  • City University of Hong Kong

Research output: Contribution to journalArticlepeer-review

Abstract

Miscible-order fluoride-phosphate blocky phosphor (FBP), composed with ordered-phase of NaYF4 crystals and unordered phase of tin-fluorophosphate glass, is prepared by a two-step process and luminescent properties of FBPs embedded with different particle sizes of NaYF4 crystals are presented. High-frequency fluorescence from higher metastable 5DJ (J = 1, 2 and 3) energy levels are effectively released in Eu3+ doped fluoride crystals. Taking the blue emission of Sn2+ as the framework, multi-peak emissions from metastable energy levels are controlled to adjust the color coordinates of the FBP to the white-light region, which the color rendering index (CRI) reaches 89. Tunable color FBP with high CRI retains splendid luminescence property of fluoride, providing a potential candidate for the development of white LED.

Original languageEnglish
Article number435705
JournalNanotechnology
Volume32
Issue number43
DOIs
StatePublished - 22 Oct 2021
Externally publishedYes

Keywords

  • Fluoride-phosphate blocky phosphor
  • Multi-peak emissions
  • White-light-emitting

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