On the Temperature Dependent Excitation and Reflection Spectra of Ln₃Al₅O₁₂:Ce³⁺ Ceramics (Ln = Y, Lu) for White LEDs

Thomas Jansen, Thomas Jüstel

Department of Chemical Engineering, Münster University of Applied Sciences, Steinfurt, Germany.

DOI: 10.4236/msa.2014.514110                

Abstract

Yttrium aluminum garnet (YAG) and Lutetium aluminum garnet (LuAG) doped with Ce³⁺ are widely applied phosphor powders or ceramics for the conversion of blue into green to yellow light in the rapidly expanding market of white light emitting high power LEDs. Surprisingly, the temperature dependent reflection and excitation spectra of these well-established materials have not been investigated until today. In this work, we report the temperature dependence of the reflection and excitation spectra of Ce3+ doped YAG and LuAG in the temperature range from 300 to 800 K.

Keywords

Temperature-Dependent Reflection, Excitation Spectra, Garnet Phosphor Ceramics, Thermal Population

Conflicts of Interest

The authors declare no conflicts of interest.

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