|
|||||
|
|
YAG:Ce3+ Transparent Ceramic Phosphors Brighten the Next-Generation Laser-Driven Lighting |
|
| Authors: | Qi Yao Pan Hu Peng Sun Min Liu Rui Dong Kefu Chao Yongfu Liu Jun Jiang Haochuan Jiang |
| Affiliation: | 1. Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201 P. R. China Nano Science and Technology Institute, University of Science and Technology of China, Suzhou, 215123 P. R. China;2. University of Chinese Academy of Sciences, Beijing, 100049 P. R. China;3. Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201 P. R. China;4. School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, 230026 P. R. China;5. College of Physics and Electronic Information, Inner Mongolia Normal University, Hohhot, 010022 P. R. China;6. Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201 P. R. China University of Chinese Academy of Sciences, Beijing, 100049 P. R. China |
| Abstract: | Y3Al5O12:Ce3+ (YAG:Ce3+) transparent ceramic phosphors (TCPs) are regarded as the most promising luminescent converter for laser-driven (LD) lighting. High-quality YAG:Ce3+ TCPs are still urgent for high efficiency LD lighting devices. YAG:Ce3+ TCPs in a vacuum ambience by using nano-sized raw materials are prepared. Controlling defects by adding nano-sized MgO and SiO2 simultaneously enables a high transmittance nearly 80%. After annealing in air furthermore, the luminous efficiency is enhanced greatly from 106 to 223 lm W−1, which is the best result reported now for LD lighting. These results demonstrate that the optimizing YAG:Ce3+ TCPs in a fitting strategy will brighten once again in the next-generation LD lighting. Based on scanning electron microscopy (SEM) coupled with a cathodoluminescence system, defects and Ce3+ distributions in grains are identified directly for the first time. |
| Keywords: | cathodoluminescence laser-driven lighting Mg2+–Si4+ transparent ceramic phosphors YAG:Ce3+ |