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 Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

55 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. © 2015 The Royal Society of Chemistry.

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

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Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

Funding

This work was supported by the HKBU and HKPolyU Joint Research Programme (RC-ICRS/15-16/02F-WKL), Natural Science Foundation of Jiangsu Province (Grant No. BK2012210), the Natural Science Foundation of the Jiangsu Higher Education Institutions of China (Grant No. 10KJB430001) and the Opening Fund of Jiangsu Key Laboratory of Advanced Functional Materials (Grant No. 12KFJJ010).

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@article{444da823101c44acbe2e073adb2bdddb,

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. {\textcopyright} 2015 The Royal Society of Chemistry.",

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

note = "Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].",

year = "2015",

doi = "10.1039/c5tc03165f",

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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, 2015, p. 12322-12327.

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

TY - JOUR

T1 - Fast synthesis of red Li3BaSrLn3(WO4)8

T2 - 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

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PY - 2015

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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. © 2015 The Royal Society of Chemistry.

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. © 2015 The Royal Society of Chemistry.

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