Affiliation:
1. State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun P. R. China
2. University of Science and Technology of China Hefei P. R. China
3. Ganjiang Innovation Academy Chinese Academy of Sciences Ganzhou P. R. China
Abstract
AbstractHighly efficient phosphors are indispensable for near‐ultraviolet (n‐UV) pumped white light emitting diodes (WLEDs). In this work, a novel blue emitting Sr6GdSc(BO3)6:0.08Ce3+ phosphor was synthesized, exhibiting a broadband blue emission (full width at half‐maximum (FWMH) = 133 nm) excited by 375 nm. Furthermore, the blue emission of Sr6GdSc(BO3)6:0.08Ce3+ was enhanced by 3.9 times through codoping Na+ ions due to the influence of charge compensation and micromorphology and size of phosphor particles. At the same time, the internal quantum efficiency was improved from 45.4% to 98.6% and the external quantum efficiency up to 75.0%. Finally, the 365 nm excited two WLED devices were constructed by integrating Sr6GdSc(BO3)6:0.08Ce3+, Sr6GdSc(BO3)6:0.08Ce3+,0.08Na+, commercial green and red phosphors with high color rendering index. These results reveal that the phosphors have prospective application in high‐quality warm white lighting.
Funder
National Natural Science Foundation of China
National Key Research and Development Program of China
Subject
Materials Chemistry,Ceramics and Composites
Cited by
2 articles.
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