Design rule for the emission linewidth of Eu2+-activated phosphors

Yongchao Jia, Samuel Poncé, Anna Miglio, Masayoshi Mikami, Xavier Gonze

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

We study from first principles the emission linewidth of Eu2+-doped LED phosphors. Based on the one-dimensional configuration coordinate model, an analysis of first principles data obtained for fifteen compounds show that, at working temperature, the linewidth of Eu2+ emission band in solids is negligibly affected by quantum effects, and can be extracted from the Franck–Condon energy shifts. For a fixed Stokes shift, the difference of Franck–Condon energy shifts in the excited and ground states is the key factor for the FWHM determination. Narrow emission Eu2+-doped LED phosphors are expected for the case with large positive value of such difference.

Original languageEnglish
Article number117258
JournalJournal of Luminescence
Volume224
DOIs
Publication statusPublished - Aug 2020

Keywords

  • Eu-doped phosphors
  • First principles
  • Full width at half-maximum
  • Light emitting diode
  • Vibronic spectra

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