Synthesis and luminescent properties of GdSrAl3O7:Tb phosphor under VUV/UV excitation |
| |
| Authors: | Liya Zhou Wallace CH Choy Jianxin Shi Menglian Gong Hongbin Liang |
| |
| Affiliation: | aSchool of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, People's Republic of China;bDepartment of Electrical and Electronic Engineering, the University of Hong Kong, Pokfulam Road, Hong Kong SAR, People's Republic of China;cState Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, People's Republic of China |
| |
| Abstract: | Superfine powder of Tb3+ ion-doped aluminates phosphors, GdSrAl3O7:Tb3+ was synthesized with a precursor prepared by an EDTA-sol–gel method at 900 °C. Field-emission scanning electron-microscopy (FE-SEM) observation indicated a narrow size-distribution of about 150–300 nm for the particles with elliptical shape. Upon excitation with vacuum ultraviolet (VUV) and near UV light excitation, the phosphors show a strong emission line at around 542 nm corresponding to the 5D4 → 7F5 transition of Tb3+, and the highest PL intensity at 542 nm was found at a content of about 12 mol% Tb3+. As the Tb3+ concentration increases, Tb ions strongly cross-relaxation interact resulting in a decrease of the lifetime. The results reveal that GdSrAl3O7:Tb3+ would be a promising green phosphor for PDP application. |
| |
| Keywords: | Sol– gel processes Luminescence Phosphors |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
