期刊
RSC ADVANCES
卷 3, 期 44, 页码 22206-22212出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ra42724b
关键词
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资金
- National Natural Science Foundations of China [51002146, 51272242]
- Natural Science Foundations of Beijing [2132050]
- Program for New Century Excellent Talents in University of Ministry of Education of China [NCET-120950]
- Fundamental Research Funds for the Central Universities [2011YYL131]
- Beijing Nova Program [Z131103000413047]
Novel self-activated vanadate phosphors, blue-emitting Sr2VO4Cl and green-emitting Sr-5(VO4)(3)Cl, were synthesized via the solid-state reaction route, and the relationship between the structure and luminescence properties was comparatively investigated. Self-activated luminescence originating from the VO43- charge transfer (VCT) transition in relation to different V-O distances was verified in two vanadate phases with different crystal structures. Sr2VO4Cl showed a blue emission band from 375 to 600 nm with a peak at 424 nm, while Sr-5(VO4)(3)Cl exhibited a green emission band from 375 to 700 nm with a peak at 517 nm. With the introduction of Eu3+ to Sr2VO4Cl, both the VCT and Eu3+ emissions were found; however, the VCT emission was quenched in Sr-5(VO4)(3)Cl after Eu3+ doping. Sr-5(VO4)(3)Cl:Eu3+ only shows the characteristic red emission lines originating from Eu3+, while Sr-5(VO4)(3)Cl:Eu3+, Na+ shows typical emissions coming from the VCT transition and the Eu3+ ions. As a comparison, the emission intensity of Sr2VO4Cl:Eu3+, Na+ decreased compared to that of Sr2VO4Cl:Eu3+. The intrinsic luminescence mechanism is discussed based on the differences in the crystal structures and the measured lifetimes.
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