Fast synthesis of red Li3BaSrLn3(WO4)8:Eu3+phosphors for white LEDs under near-UV excitation by a microwave-assisted solid state reaction method and photoluminescence studies

Bo Wei; Zhenyu Liu; Chen Xie; Shu Yang; Wentao Tang; Aiwei Gu; Wing Tak Wong; Ka Leung Wong

doi:10.1039/c5tc03165f

Fast synthesis of red Li₃BaSrLn₃(WO₄)₈:Eu³⁺phosphors for white LEDs under near-UV excitation by a microwave-assisted solid state reaction method and photoluminescence studies

Bo Wei, Zhenyu Liu, Chen Xie, Shu Yang, Wentao Tang, Aiwei Gu, Wing Tak Wong, Ka Leung Wong

Research output: Journal article publication › Journal article › Academic research › peer-review

53 Citations (Scopus)

Abstract

Red Li3BaSrLa3(WO4)8:Eu3+phosphors have been successfully synthesized by a rapid microwave-assisted solid state method. The sintering time for the optimal phosphor can be limited to only 10 minutes at 900 °C. Upon near-ultra-violet (NUV) excitation, strong red emission can be found in 90% Eu3+doped tungstate compounds. This phosphor exhibits impressive thermal stability, and the purity of red emission Li3BaSrLa3(WO4)8:Eu3+in high Eu3+doping concentrations can achieve the coordinate values (x = 0.670, y = 0.330), indicating high red color purity. The corresponding quantum yield (QY) is measured (28.36 ± 0.09%). Photoluminescence and kinetic studies showed no obvious effects due to the concentration quenching effect, cross relaxation and non-radiative energy transfer. Li3BaSrLa3(WO4)8:Eu3+can be synthesized using a simple and quick method and the comprehensive photophysical studies of the novel phosphor (Li3BaSrLa3(WO4)8:Eu3+) have been done and the potential as a practical phosphor for NUV-excited white LEDs (WLEDs) has been shown.

Original language	English
Pages (from-to)	12322-12327
Number of pages	6
Journal	Journal of Materials Chemistry C
Volume	3
Issue number	47
DOIs	https://doi.org/10.1039/c5tc03165f
Publication status	Published - 1 Jan 2015

ASJC Scopus subject areas

General Chemistry
Materials Chemistry

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10.1039/c5tc03165f

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title = "Fast synthesis of red Li3BaSrLn3(WO4)8:Eu3+phosphors for white LEDs under near-UV excitation by a microwave-assisted solid state reaction method and photoluminescence studies",

abstract = "Red Li3BaSrLa3(WO4)8:Eu3+phosphors have been successfully synthesized by a rapid microwave-assisted solid state method. The sintering time for the optimal phosphor can be limited to only 10 minutes at 900 °C. Upon near-ultra-violet (NUV) excitation, strong red emission can be found in 90% Eu3+doped tungstate compounds. This phosphor exhibits impressive thermal stability, and the purity of red emission Li3BaSrLa3(WO4)8:Eu3+in high Eu3+doping concentrations can achieve the coordinate values (x = 0.670, y = 0.330), indicating high red color purity. The corresponding quantum yield (QY) is measured (28.36 ± 0.09%). Photoluminescence and kinetic studies showed no obvious effects due to the concentration quenching effect, cross relaxation and non-radiative energy transfer. Li3BaSrLa3(WO4)8:Eu3+can be synthesized using a simple and quick method and the comprehensive photophysical studies of the novel phosphor (Li3BaSrLa3(WO4)8:Eu3+) have been done and the potential as a practical phosphor for NUV-excited white LEDs (WLEDs) has been shown.",

author = "Bo Wei and Zhenyu Liu and Chen Xie and Shu Yang and Wentao Tang and Aiwei Gu and Wong, {Wing Tak} and Wong, {Ka Leung}",

year = "2015",

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doi = "10.1039/c5tc03165f",

language = "English",

volume = "3",

pages = "12322--12327",

journal = "Journal of Materials Chemistry C",

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publisher = "Royal Society of Chemistry",

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}

Fast synthesis of red Li₃BaSrLn₃(WO₄)₈:Eu³⁺phosphors for white LEDs under near-UV excitation by a microwave-assisted solid state reaction method and photoluminescence studies. / Wei, Bo; Liu, Zhenyu; Xie, Chen et al.
In: Journal of Materials Chemistry C, Vol. 3, No. 47, 01.01.2015, p. 12322-12327.

Research output: Journal article publication › Journal article › Academic research › peer-review

TY - JOUR

T1 - Fast synthesis of red Li3BaSrLn3(WO4)8:Eu3+phosphors for white LEDs under near-UV excitation by a microwave-assisted solid state reaction method and photoluminescence studies

AU - Wei, Bo

AU - Liu, Zhenyu

AU - Xie, Chen

AU - Yang, Shu

AU - Tang, Wentao

AU - Gu, Aiwei

AU - Wong, Wing Tak

AU - Wong, Ka Leung

PY - 2015/1/1

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N2 - Red Li3BaSrLa3(WO4)8:Eu3+phosphors have been successfully synthesized by a rapid microwave-assisted solid state method. The sintering time for the optimal phosphor can be limited to only 10 minutes at 900 °C. Upon near-ultra-violet (NUV) excitation, strong red emission can be found in 90% Eu3+doped tungstate compounds. This phosphor exhibits impressive thermal stability, and the purity of red emission Li3BaSrLa3(WO4)8:Eu3+in high Eu3+doping concentrations can achieve the coordinate values (x = 0.670, y = 0.330), indicating high red color purity. The corresponding quantum yield (QY) is measured (28.36 ± 0.09%). Photoluminescence and kinetic studies showed no obvious effects due to the concentration quenching effect, cross relaxation and non-radiative energy transfer. Li3BaSrLa3(WO4)8:Eu3+can be synthesized using a simple and quick method and the comprehensive photophysical studies of the novel phosphor (Li3BaSrLa3(WO4)8:Eu3+) have been done and the potential as a practical phosphor for NUV-excited white LEDs (WLEDs) has been shown.

AB - Red Li3BaSrLa3(WO4)8:Eu3+phosphors have been successfully synthesized by a rapid microwave-assisted solid state method. The sintering time for the optimal phosphor can be limited to only 10 minutes at 900 °C. Upon near-ultra-violet (NUV) excitation, strong red emission can be found in 90% Eu3+doped tungstate compounds. This phosphor exhibits impressive thermal stability, and the purity of red emission Li3BaSrLa3(WO4)8:Eu3+in high Eu3+doping concentrations can achieve the coordinate values (x = 0.670, y = 0.330), indicating high red color purity. The corresponding quantum yield (QY) is measured (28.36 ± 0.09%). Photoluminescence and kinetic studies showed no obvious effects due to the concentration quenching effect, cross relaxation and non-radiative energy transfer. Li3BaSrLa3(WO4)8:Eu3+can be synthesized using a simple and quick method and the comprehensive photophysical studies of the novel phosphor (Li3BaSrLa3(WO4)8:Eu3+) have been done and the potential as a practical phosphor for NUV-excited white LEDs (WLEDs) has been shown.

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JO - Journal of Materials Chemistry C

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Fast synthesis of red Li₃BaSrLn₃(WO₄)₈:Eu³⁺phosphors for white LEDs under near-UV excitation by a microwave-assisted solid state reaction method and photoluminescence studies

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