Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/63858
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
Authors: Wei, Bo
Liu, Z
Xie, C
Yang, S
Tang, W
Gu, A
Wong, WT 
Wong, KL
Issue Date: 2015
Publisher: Royal Society of Chemistry
Source: Journal of materials chemistry C, 2015, v. 3, no. 47, p. 12322-12327 How to cite?
Journal: Journal of materials chemistry C 
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.
URI: http://hdl.handle.net/10397/63858
ISSN: 2050-7526
EISSN: 2050-7534
DOI: 10.1039/C5TC03165F
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