Abstract
A yellow-emitting phosphor, CaO:Ce3+,Na+ is synthesized by solid-state reaction. The photoluminescence spectra, fluorescence decay curves and the temperature-dependent luminescence are investigated. The results show that CaO:Ce3+,Na+ can be excited by blue light, which matched well with the emission wavelengths of blue InGaN LED chips. When excited at 474nm, in the range of 480–700nm, CaO:Ce3+,Na+ exhibits a strong yellow emission band located around 555nm. The temperature-dependent luminescence behavior of this phosphor indicates that CaO:Ce3+,Na+ exhibits better thermal stability than commercial YAG:Ce3+.
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