光谱学与光谱分析 |
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Preparation and Luminescence Characteristics of Ba1.97Ca1-x(B3O6)2∶Eu2+0.03, Mnx2+ Phosphor for White LED |
SONG En-hai1,ZHAO Wei-ren1*, ZHOU Guo-xiong1, DOU Xi-hua1, YUN Jun1, YI Chun-yu2 |
1. School of Physics & Optoelectronic Engineering,Guangdong University of Technology, Guangzhou 510006, China 2. Huizhou Unihero Semiconductor Lighting Technology Co., Ltd.,Huizhou 516006, China |
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Abstract The Ba1.97Ca1-x(B3O6)2∶Eu2+, Mnx2+(x=0,0.03,0.06,0.15) phosphors were synthesized by high temperature solid-state reaction, and their phase composition and luminescence properties were studied. In these phosphors, Eu2+ locates at the crystal sites of Ba2+ and Ca2+ ions. Under 317 nm UV light excitation, the 5d→4f transition of Eu2+ forms a broad blue emission band with a peak at 450 nm. With the energy transfer from Eu2+ions, Mn2+ ions emit a broad red band with the peak at 600 nm. The mixture of the broad blue emission and a broad red emission forms an approximate white light with the CIE chromaticity (x=0.371, y=0.282). The phosphors can be excited effectively by UV light in the range of 250-400 nm, so they are the potential candidates for single white light-emitting phosphor excited by UV-LED.
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Received: 2010-02-22
Accepted: 2010-05-26
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Corresponding Authors:
ZHAO Wei-ren
E-mail: zwren123@126.com
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