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AN TANG1,* , FENGXIANG SHAO1, LIDUO GU2, JIANYING LIU1, HAOMING ZHANG1, YONGTAO ZHAO1, HAIJUN CHEN1, HONGSONG ZHANG1
- Department of Mechanical Engineering, Henan Institute of Engineering, Zhengzhou, Henan 451191, China
- Department of Mechanics, Henan Mechanical and Electrical Vocational College, Zhengzhou, Henan, 451191, China
In2-x(WO4)3:xEu3+ red phosphors were synthesized by a high temperature solid-state reaction in air. X-ray diffraction (XRD), laser particle size analyzer and molecular fluorescence spectrometer were used to respectively investigate the structures, size distribution and luminescence properties. The XRD result displays the as-prepared phosphor with no impurity phase, and doping Eu3+ in the In2(WO4)3 cannot change the host crystal structure. The particle size exhibits a normal size distribution with the average diameter of around 2.4μm serving the coating of manufacturing LED. The excitation spectrum reveals that the phosphor can be effectively excited under the excitation of near-UV or blue light. In the emission spectrum, the greatest red emission at 611nm resulting from the Eu3+ transition of 5D0→7 F2 was found. The photoluminescence intensity is dependent on the concentration of Eu3+, and the optimal Eu3+ -doped concentration is 15mol%. Considering good luminescence performance of the phosphor, the In2(WO4)3:Eu3+ is suggested to be a promising red-emitting material for white LEDs..
Red-emitting phosphor, Luminescence properties, In2(WO4)3, Solid-state reaction, White LEDs.
Submitted at: May 9, 2016
Accepted at: Aug. 3, 2016
AN TANG, FENGXIANG SHAO, LIDUO GU, JIANYING LIU, HAOMING ZHANG, YONGTAO ZHAO, HAIJUN CHEN, HONGSONG ZHANG, A potential red-emitting phosphor In2(WO4)3:Eu3+ for white LEDs and its luminescence properties, Journal of Optoelectronics and Advanced Materials Vol. 18, Iss. 7-8, pp. 608-612 (2016)
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