期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 646, 期 -, 页码 315-320出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2015.05.280
关键词
Phosphors; Luminescence; Li4SrCa(SiO4)(2); Ce3+; Solid state reactions
资金
- National Natural Science Foundation of China [51402105, 20971042]
- Specialized Research Fund for the Doctoral Program of Higher Education [20124306120005, 20134306120009]
- Hunan Provincial Natural Science Foundation of China [12JJ2029]
- Aid Program for Science and Technology Innovative Research Team in Higher Educational Institutions of Hunan Province
High quantum efficiency is a vital parameter of phosphors for practical application. An efficient near-UV and blue emitting phosphor Li4SrCa(SiO4)(2):Ce3+ was synthesized by a traditional solid-state reaction, and luminescent properties were studied in detail. The Ce3+-activated phosphor can emit both a near-UV light centred at 345 nm and a blue light peaking at 420 nm when Ce3+ occupies the Sr and Ca site, respectively. The internal quantum efficiency (IQE) of Li4SrCa(SiO4)(2):0.03Ce(3+) is as high as 97% under the excitation at 288 nm, while the external quantum efficiency (EQE) is 66%. The IQE and EQE values of Li4SrCa(SiO4)(2):0.03Ce(3+) under the excitation at 360 nm are 82% and 31%, respectively. (C) 2015 Elsevier B.V. All rights reserved.
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