期刊
OPTICAL MATERIALS
卷 41, 期 -, 页码 94-97出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optmat.2014.08.002
关键词
Luminescence; White LED; Energy transfer; Rare earth doping; CIE coordinates
资金
- Czech National Science Foundation [13-09876S]
- Czech TACR [TA01011017]
KLuS2 single crystals doped with divalent europium and co-doped with trivalent praseodymium, samarium or cerium were synthesized in the form of crystalline hexagonal platelets as interesting candidates for white LED solid state lighting. Luminescence characteristics in UV/Vis, including radioluminescence, photoluminescence excitation and emission spectra and photoluminescence decays, were measured in the broad concentration and temperature interval revealing presence of thermally stable emission features of both Eu2+ and co-dopants in a single KLuS2 host. Energy transfer from Eu2+ to Pr3+, Sm3+ and Ce3+ is identified. CIE xy-coordinates are used to compare effects of dopants on resulting spectrum. The application potential in white LEDs phosphors is discussed. (C) 2014 Elsevier B.V. All rights reserved.
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