| Yan-ming Dong,Hai-ping Xia,Li Fu,Shan-shan Li,Xue-mei Gu,Jian-li Zhang,Dong-jie Wang,Yue-pin Zhang,Hao-chuan Jiang,Bao-jiu Chen.White light emission from Dy3+-doped LiLuF4 single crystal grown by Bridgman method[J].Optoelectronics Letters,2014,10(4):262-265 |
| White light emission from Dy3+-doped LiLuF4 single crystal grown by Bridgman method |
| Author Name | Affiliation | E-mail | | Yan-ming Dong | Key Laboratory of Photo-electronic Materials, Ningbo University, Ningbo, 315211, China | | | Hai-ping Xia | Key Laboratory of Photo-electronic Materials, Ningbo University, Ningbo, 315211, China | hpxcm@nbu.edu.cn | | Li Fu | Key Laboratory of Photo-electronic Materials, Ningbo University, Ningbo, 315211, China | | | Shan-shan Li | Key Laboratory of Photo-electronic Materials, Ningbo University, Ningbo, 315211, China | | | Xue-mei Gu | Key Laboratory of Photo-electronic Materials, Ningbo University, Ningbo, 315211, China | | | Jian-li Zhang | Key Laboratory of Photo-electronic Materials, Ningbo University, Ningbo, 315211, China | | | Dong-jie Wang | Key Laboratory of Photo-electronic Materials, Ningbo University, Ningbo, 315211, China | | | Yue-pin Zhang | Key Laboratory of Photo-electronic Materials, Ningbo University, Ningbo, 315211, China | | | Hao-chuan Jiang | Ningbo Institute of Materials Technology and Engineering, the Chinese Academy of Sciences, Ningbo, 315211, China | | | Bao-jiu Chen | Department of Physics, Dalian Maritime University, Dalian, 116026, China | |
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| Abstract: |
| Lithium lutetium fluoride (LiLuF4) single crystals doped with different Dy3+ ion concentrations were grown by Bridgman method. The Judd-Ofelt (J-O) strength parameters (Ω 2, Ω 4, Ω 6) of Dy3+ in LiLuF4 crystal are calculated according to the measured absorption spectra and the J-O theory, by which the asymmetry of the Dy3+:LiLuF4 single crystal and the possibility of attaining stimulated emission from 4F9/2 level are analyzed. The capability of the Dy3+:LiLuF4 crystal in generating white light by simultaneous blue and yellow emissions under excitation with ultraviolet light is produced. The effects of excitation wavelength and doping concentration on chromaticity coordinates and photoluminescence intensity are also investigated. Favorable CIE coordinates, x=0.319 3 and y=0.349 3, can be obtained for Dy3+ ion in 2.701% molar doping concentration under excitation of 350 nm. |
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| This work has been supported by the National Natural Science Foundation of China （Nos.51272109 and 1 1374044）, the Natural Science Founda- tion of Ningbo city （No.201401 A6105016）, and K.C. Wong Magna Fund in Ningbo University. |
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