YAG:Ce3+ Transparent Ceramic Phosphors Brighten the Next-Generation Laser-Driven Lighting

Qi Yao; Pan Hu; Peng Sun; Min Liu; Rui Dong; Kefu Chao; Yongfu Liu; Jun Jiang; Haochuan Jiang

doi:10.1002/adma.201907888

YAG:Ce³⁺ Transparent Ceramic Phosphors Brighten the Next-Generation Laser-Driven Lighting

Adv Mater. 2020 May;32(19):e1907888. doi: 10.1002/adma.201907888. Epub 2020 Mar 29.

Authors

Qi Yao^{1

2}, Pan Hu³, Peng Sun¹, Min Liu⁴, Rui Dong¹, Kefu Chao⁵, Yongfu Liu³, Jun Jiang^{1

3}, Haochuan Jiang^{1

3}

Affiliations

¹ Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, P. R. China.
² Nano Science and Technology Institute, University of Science and Technology of China, Suzhou, 215123, P. R. China.
³ University of Chinese Academy of Sciences, Beijing, 100049, 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.

PMID: 32227397
DOI: 10.1002/adma.201907888

Abstract

Y₃ Al₅ O₁₂ :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: Mg 2+-Si 4+; YAG:Ce 3+; cathodoluminescence; laser-driven lighting; transparent ceramic phosphors.

Abstract

Grants and funding