Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5458051 | Journal of Alloys and Compounds | 2018 | 8 Pages |
Abstract
Yellow-emitting persistent phosphor Gd3Al2Ga3O12:Ce3+ (GAGG:Ce3+) was synthesized by two-step solid-state reactions. The phase evolution, luminescence, persistent luminescence, and thermal stabilities of GAGG:Ce3+ sintered in an O2 atmosphere and annealed in a CO reducing atmosphere at different temperatures were investigated. Comparing with the samples sintered only in O2, the samples annealed in CO show higher luminescence and afterglow and better thermal stability. Under 445Â nm excitation, the luminescence and afterglow of GAGG:Ce3+ are similar with each other, displaying a broad yellow emission with a peak around 545Â nm. By optimizing the sintering process, the internal quantum efficiency can reach as high as 71.3%. The time Ï80 is about 15Â ms, which is much longer than 0.4Â ms required for alternating current (AC)-LEDs. These results indicate the promising application of the GAGG:Ce3+ persistent phosphor for reducing flicker from AC-LEDs.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Pu Liu, Yongfu Liu, Cai'e Cui, Lei Wang, Jianwei Qiao, Ping Huang, Qiufeng Shi, Yue Tian, Haochuan Jiang, Jun Jiang,