| 光谱学与光谱分析 |
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| Synthesis and Luminescence Properties of BiOCl∶Dy3+ Phosphors for NUV Excited White Light-Emitting Diodes |
| KUANG Qing-liang, LI Yong-jin*, QIU Jian-bei, YIN Zhao-yi, YANG Zheng-wen, SONG Zhi-guo*, WAN Rong-hua, LIU Qun, ZHOU Yu-ting |
| School of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China |
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Abstract In the present paper, we reported the luminescence properties of BiOCl∶Dy3+ and BiOCl∶Dy3+, Li+ phosphor synthesized by conventional solid state method. X-ray diffraction (XRD) and excitation and emission spectroscopy were used to characterize the samples. Results show that pure tetragonal BiOCl∶Dy3+ crystals can be synthesized successfully at 500 ℃, and Li+ ion dopant improves the crystallinity of samples furtherly. Under near UV light excitation, the samples give the characteristic luminescence of Dy3+ ions located at 478 (blue) and 574 nm (yellow), which show a low yellow-to-blue intensity ratio (Y/B) of Dy3+ emission and white light emission. Moreover, codoping of Li+ ion can realize the enhancement of emission intensity and the adjustment of emission color. The characteristics of BiOCl∶Dy3+ phosphor, low temperature preparation, good near ultraviolet excitation and white light emission make it to a promising near-ultraviolet WLED phosphor.
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Received: 2014-04-13
Accepted: 2014-08-11
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Corresponding Authors:
LI Yong-jin,SONG Zhi-guo
E-mail: songzg@kmust.edu.cn;liyongjin2008@163.com
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