A Study on the Luminescence Properties of CaAlBO[sub 4]:RE[sup 3+] (RE=Ce, Tb, and Eu) Phosphors

A series of new phosphors of were synthesized by conventional solid-state reactions. The X-ray diffraction data indicate that a pure phase of can be successfully obtained. The photoluminescence (PL) spectra, quantum efficiency, and CIE coordinates of were investigated. The PL and PL excitation spectra indicate that the emission wavelengths of are 372 and 398 nm (with full width at half maximum of 33 nm) attributed to the – transition of the activator, respectively. displays green emission at 483, 543, 584, and 620 nm, while shows a dominating emission peak at 621 nm, which is attributed to the transition. The quantum efficiencies of optimized , , and were found to be 43, 21, and 19%, respectively. The phosphors may provide a new kind of luminescent material under UV excitation.