| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5402272 | Journal of Luminescence | 2010 | 4 Pages |
Abstract
Hexagonal Ba1.20Ca0.8â2xâySiO4:xCe3+,xLi+,yMn2+ phosphors exhibit two emission bands peaking near 400 and 600 nm from the allowed f-d transition of Ce3+ ions and the forbidden 4T1-6A1 transition of Mn2+ ions, respectively. The strong interaction between Ce3+/Mn2+ ions is investigated in terms of energy transfer, crystal field effect, and microstructure by varying their concentrations. They show a higher quenching temperature of 250 °C than that of a commercially used (Ba,Sr)2SiO4:Eu2+ phosphor (150 °C). Finally, mixtures of these phosphors with green-emissive Ba1.20Ca0.70SiO4:0.10Eu2+ are tested and yielded correlated color temperatures from 3500 to 7000 K, and color rendering indices up to 95%.
Related Topics
Physical Sciences and Engineering
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Physical and Theoretical Chemistry
Authors
Kwangwon Park, Jaebum Lee, Jehong Park, Jongsu Kim, Patrick Kung, Seongsin M. Kim, Gawngchul Kim,