Phosphor in glass using β-SiAlON:Eu2+, CaAlSiN3:Eu2+ and Nd-doped silicate glass for enhanced color gamut of white LED

Yoon Hee Nam, Woon Jin Chung, Won Bin Im

Research output: Contribution to journalArticle

Abstract

A phosphor-in-glass (PiG) was fabricated to realize a robust white light emitting diode (wLED) with wide color gamut. β-SiAlON:Eu2+ and CaAlSiN3:Eu2+ were employed for the green and red phosphors, respectively. Nd2O3 doped silicate glass was used to reduce the emission bandwidths of the phosphors, utilizing the hypersensitive transition of Nd3+: 4I9/24G5/2, 2G7/2. The content of green and red phosphors was varied to produce a white emission. The emission spectra, color coordinates and color gamuts of the wLEDs with the PiGs were examined by varying phosphors and Nd2O3 content. A wLED with 5 mol% Nd2O3 doped glass had an enhanced color gamut up to 88%. The thermal stability of the PiGs was also monitored to demonstrate its practical feasibility as a white light source in display applications.

Original languageEnglish
Article number156945
JournalJournal of Alloys and Compounds
Volume851
DOIs
StatePublished - 2021 Jan 15

Keywords

  • Color gamut
  • Glass
  • LED
  • Phosphors
  • Rare earths

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