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

doi:10.1006/jssc.2000.8941

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

College of Science

Research output: Contribution to journal › Article › peer-review

43 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 language	English
Pages (from-to)	267-273
Number of pages	7
Journal	Journal of Solid State Chemistry
Volume	156
Issue number	2
DOIs	https://doi.org/10.1006/jssc.2000.8941
Publication status	Published - 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

Access to Document

10.1006/jssc.2000.8941

Cite this

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title = "Electronic structures and luminescence properties of YNbO4 and YNbO4:Bi",

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.",

keywords = "Blue phosphor, Charge transfer, Density functional theory, YNbO",

author = "Lee, {Seung Kwon} and Hyunju Chang and Han, {Cheong Hwa} and Kim, {Hyun Jung} and Jang, {Ho G.} and Park, {Hee Dong}",

note = "Funding Information: This work was supported {"}nancially by the Ministry of Science and Technology in Korea.",

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T1 - Electronic structures and luminescence properties of YNbO4 and YNbO4:Bi

AU - Lee, Seung Kwon

AU - Chang, Hyunju

AU - Han, Cheong Hwa

AU - Kim, Hyun Jung

AU - Jang, Ho G.

AU - Park, Hee Dong

N1 - Funding Information: This work was supported "nancially by the Ministry of Science and Technology in Korea.

PY - 2001

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N2 - 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.

AB - 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.

KW - Blue phosphor

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KW - Density functional theory

KW - YNbO

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