CaYAlO4:Tb-x(3+) has been synthesized through combustion processes, and the
optical properties on the CaYAlO4:Tb-x(3+) have been investigated by catho
doluminescence (CL) measurements. The results for the CL spectra show emiss
ion color tuning from blue to yellow in heavily Tb3+ doped CaYAlO4 through
cross-relaxation processes involving the Tb3+ ions in CaYAlO4. These result
s indicate that CaYAlO4 can be used as a stable host material with strong c
hemical band strengths.