Electronic structures and luminescence properties of YNbO4 and YNbO4:Bi

Seung Kwon Lee, Hyunju Chang, Cheong Hwa Han, Hyun Jung Kim, Ho G. Jang, Hee Dong Park

Research output: Contribution to journalArticlepeer-review

42 Citations (Scopus)

Abstract

The luminescence properties of fergusonite phosphors, YNbO4 and YNbO4:Bi, were investigated with photoluminescence (PL) measurements and first-principles calculations. The various absorption spectra of these phosphors have been interpreted using the calculated partial density of states in the framework of density functional theory. We were able to determine the charge-transfer gap of YNbO4, 4.3 eV, that agrees well with our experimental measurement. From our analysis of PL spectra and calculations, we have investigated the Bi effect in YNbO4:Bi, which shows an excitation peak at a longer wavelength than YNbO4. We have found that the charge transfer from oxygen to bismuth is the main reason for the peak position shift in the excitation spectra.

Original languageEnglish
Pages (from-to)267-273
Number of pages7
JournalJournal of Solid State Chemistry
Volume156
Issue number2
DOIs
Publication statusPublished - 2001

Keywords

  • Blue phosphor
  • Charge transfer
  • Density functional theory
  • YNbO

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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