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

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 selec...

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Bibliographic Details
Published inJournal of luminescence Vol. 187; pp. 20 - 25
Main Authors Rejman, Martin, Babin, Vladimir, Kucerková, Romana, Nikl, Martin
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.07.2017
Subjects
CIE
Energy level lifetime
Simulation
Single-crystal
Temperature dependence
White LED
YAG:Ce
Temperature dependence
Simulation
Energy level lifetime
YAG:Ce
Single-crystal
CIE
White LED
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Summary: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. •Single-crystal absorbance and emission spectra measured.•Lifetime increase explained via a Geant4 simulation.•Temperature and other effects on CIE-xy calculated.
ISSN:0022-2313
1872-7883
DOI:10.1016/j.jlumin.2017.02.047