Wavelength conversion characteristics of Eu3+/Yb 3+-activated La2O2S luminophor

Joon Jae Oh, Byeong Kyou Jin, Woon Jin Chung, Dong Wook Shin, Yong Gyu Choi

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We have fabricated a La2O2S luminophor doped with Eu3+ and/or Yb3+ via a solid state reaction process, and measured radiative emissions in the visible and near-infrared wavelengths under excitation at ultraviolet wavelengths. In particular, the wavelength conversion characteristics of this oxysulfide matrix were investigated in comparison with a La2O3 + La(OH)3 matrix. The rare earth ions embedded in the oxysulfide matrix feel crystal fields with poorer inversion symmetry relative to those in the oxide counterpart. This is attributed to the coexistence of oxygen and sulfur ions in their first coordination shells. Consequently, the La2O2S luminophor provides better performance in terms of emission intensity and spontaneous emission rate. In addition, under excitation at ultraviolet wavelengths, the Eu 3+/Yb3+-doped La2O2S powders exhibited many strong emissions at wavelengths that can be efficiently absorbed by a typical Si-based solar cell.

Original languageEnglish
Pages (from-to)S15-S18
JournalCurrent Applied Physics
Volume11
Issue number4 SUPPL.
DOIs
StatePublished - 2011 Jul 1

Fingerprint

Optical frequency conversion
Wavelength
wavelengths
Ions
matrices
Spontaneous emission
Crystal symmetry
Solid state reactions
Sulfur
Powders
Oxides
Rare earths
Solar cells
oxygen ions
spontaneous emission
excitation
crystal field theory
Oxygen
Infrared radiation
ions

Keywords

  • Luminophor
  • Oxysulfide
  • Rare Earths
  • Si Solar cell
  • Wavelength conversion

Cite this

Oh, Joon Jae ; Jin, Byeong Kyou ; Chung, Woon Jin ; Shin, Dong Wook ; Choi, Yong Gyu. / Wavelength conversion characteristics of Eu3+/Yb 3+-activated La2O2S luminophor. In: Current Applied Physics. 2011 ; Vol. 11, No. 4 SUPPL. pp. S15-S18.
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abstract = "We have fabricated a La2O2S luminophor doped with Eu3+ and/or Yb3+ via a solid state reaction process, and measured radiative emissions in the visible and near-infrared wavelengths under excitation at ultraviolet wavelengths. In particular, the wavelength conversion characteristics of this oxysulfide matrix were investigated in comparison with a La2O3 + La(OH)3 matrix. The rare earth ions embedded in the oxysulfide matrix feel crystal fields with poorer inversion symmetry relative to those in the oxide counterpart. This is attributed to the coexistence of oxygen and sulfur ions in their first coordination shells. Consequently, the La2O2S luminophor provides better performance in terms of emission intensity and spontaneous emission rate. In addition, under excitation at ultraviolet wavelengths, the Eu 3+/Yb3+-doped La2O2S powders exhibited many strong emissions at wavelengths that can be efficiently absorbed by a typical Si-based solar cell.",
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Wavelength conversion characteristics of Eu3+/Yb 3+-activated La2O2S luminophor. / Oh, Joon Jae; Jin, Byeong Kyou; Chung, Woon Jin; Shin, Dong Wook; Choi, Yong Gyu.

In: Current Applied Physics, Vol. 11, No. 4 SUPPL., 01.07.2011, p. S15-S18.

Research output: Contribution to journalArticle

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T1 - Wavelength conversion characteristics of Eu3+/Yb 3+-activated La2O2S luminophor

AU - Oh, Joon Jae

AU - Jin, Byeong Kyou

AU - Chung, Woon Jin

AU - Shin, Dong Wook

AU - Choi, Yong Gyu

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AB - We have fabricated a La2O2S luminophor doped with Eu3+ and/or Yb3+ via a solid state reaction process, and measured radiative emissions in the visible and near-infrared wavelengths under excitation at ultraviolet wavelengths. In particular, the wavelength conversion characteristics of this oxysulfide matrix were investigated in comparison with a La2O3 + La(OH)3 matrix. The rare earth ions embedded in the oxysulfide matrix feel crystal fields with poorer inversion symmetry relative to those in the oxide counterpart. This is attributed to the coexistence of oxygen and sulfur ions in their first coordination shells. Consequently, the La2O2S luminophor provides better performance in terms of emission intensity and spontaneous emission rate. In addition, under excitation at ultraviolet wavelengths, the Eu 3+/Yb3+-doped La2O2S powders exhibited many strong emissions at wavelengths that can be efficiently absorbed by a typical Si-based solar cell.

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