文献类型：期刊文献

英文题名：Novel Self-Activated Zinc Gallogermanate Phosphor: The Origin of its Photoluminescence

作者：Ren, Jing[1,2];Xu, Xiaoqing[1];Zeng, Huidan[1];Chen, Guorong[1];Kong, Deshuang[2];Gu, Changjun[2];Chen, Chunming[2];Liu, Zhibin[2];Kong, Linren[2]

机构：[1]E China Univ Sci & Technol, Sch Mat Sci & Engn, Minist Educ, Key Lab Ultrafine Mat, Shanghai 200237, Peoples R China;[2]Jiangsu Gaochun Ceram Co Ltd, Nanjing, Jiangsu, Peoples R China

年份：2014

卷号：97

期号：10

起止页码：3197

外文期刊名：JOURNAL OF THE AMERICAN CERAMIC SOCIETY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000343829900027)】；

基金：This study was supported by China Postdoctoral Science Foundation (2013M540335) and the National Natural Science Foundation of China (51302082). The author thanks Dr. Shifeng Zhou (zhoushifeng@scut.edu.cn) and Dr. Yang Li (lychris@sina.com), from South China University of Technology, Guangzhou, China, for helping us measure the thermoluminescence glow spectra and most valuable discussion.

语种：英文

摘要：Since 2012, zinc gallogermanate has drawn interests as an excellent host phosphor for a variety of dopants (e.g., Cr3+, Bi3+ and Mn2+). However, the origin of its self-activated luminescence has been largely unknown. Here, zinc gallogermanate of the composition Zn1+xGa2-2xGexO4 (0x1) is prepared by solid-state reaction, and the evolution of the crystal structure with the composition is studied. The phosphors show a broad white-bluish emission upon excitation by ultraviolet (UV) light, and the luminescence intensity greatly increases as Ga3+ are substituted by Ge4+. A full spectrum of the defects and trap centers responsible for the luminescence is given by a multiple characterization methods, such as low temperature electron spin resonance, positron annihilation lifetime and thermoluminescence spectra. The results show that the zinc gallogermanate is a promising self-activated phosphor for a variety of applications.