Journal of Inorganic Materials ›› 2015, Vol. 30 ›› Issue (11): 1183-1188.DOI: 10.15541/jim20150160

• Orginal Article • Previous Articles     Next Articles

Synthesis and Growth of Ce,Pr:YLuAG Crystal for LED Application

NIU Xue-jiao1, XU Jia-Yue1, ZHOU Ding1,WANG Shu-Xian2, ZHANG Huai-Jin2   

  1. (1. Institute of Crystal Growth, School of Materials Science and Engineering, Shanghai Institute of Technology, Shanghai 201418, China; 2. Institute of Crystal Materials, Shandong University, Jinan250100, China)
  • Received:2015-04-03 Revised:2015-04-25 Online:2015-11-20 Published:2015-10-20
  • About author:NIU Xue-jiao. E-mail: niuxuejiao102@163.com
  • Supported by:
    National Natural Science Foundation of China (51472263);Key Project of Basic Research in Shanghai(11JC1412400)

Abstract:

Ce,Pr:YLuAG pure phase powder was synthesized by co-precipitation method and calcined at 1450℃, which had a garnet structure. The feed rod was prepared by press forming and solid state sintering. TEM showed that the sintered rod had good crystallinity and density. Ce,Pr:YLuAG single crystal was grown by the floating zone method. The as-grown crystal was transparent with a pale yellow color, and small cracks were observed in the shoulder. The transmittance of the crystal is 81.8%, which is close to the theoretical value 84.2%. Under 460 nm excitation, Ce,Pr:YLuAG crystal shows the emission band of Ce3+ at 530 nm and peak of Pr3+ at 610 nm, which shows that Ce3+ can transfer the energy to Pr3+. However, only Pr3+ emission peak appears when it is excitated at 487 nm. The color coordinate is located at (0.474, 0.495) which shifts to red zone compared with commercial Ce:YAG yellow phosphor. As a result, Ce,Pr:YLuAG crystal is more suitable to fabricate white LED.

Key words: floating zone method, crystal growth, doping, YLuAG crystal

CLC Number: