Temperature dependence of CIE-x,y color coordinates in YAG:Ce single crystal phosphor

0486910 - FZÚ 2018 RIV NL eng J - Journal Article
Rejman, M. - Babin, Vladimir - Kučerková, Romana - Nikl, Martin
Temperature dependence of CIE-x,y color coordinates in YAG:Ce single crystal phosphor.
Journal of Luminescence. Roč. 187, Jul (2017), s. 20-25. ISSN 0022-2313. E-ISSN 1872-7883
R&D Projects: GA TA ČR TA04010135
Institutional support: RVO:68378271
Keywords : YAG:Ce * single-crystal * simulation * energy level lifetime * white LED * CIE * temperature dependence
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 2.732, year: 2017

Using single-crystal YAG:Ce plates with different dopant concentration under different sample temperatures (77-500(800)K), absorption, emission and luminescence decay characteristics were measured. Simulation is used to explain the luminescence decay time increase with growing temperature. For selected incident blue excitation band and given sample thickness the composed blue-yellow spectrum is calculated after passing through the sample. Temperature dependence of the color coordinates CIE-xy is calculated, arising mostly due to specific temperature dependence of the 4f-5d1 absorption transition of Ce3+ center in the garnet host.
Permanent Link: http://hdl.handle.net/11104/0281620