Blue-violet light can not only enhance the total content of biomass and glucoside but also enrich the taste of the fruit.Thus,it is meaningful to study the blue-violet luminescent materials for plant cultivation.In this study,titanium(IV)-activated CaYAlO4(CYAO)phosphors were synthesized by conventional high-temperature solid-state reaction.X-ray powder diffraction was employed to analyze the crystal-structure of CYAO.It is found that the doped Ti4+ions do not change obviously the crystal structure of phosphors.Upon 246 nm excitation,CaYAl1-xO4:xTi4+phosphors exhibit broad blue-violet emission band peaking at 395 nm,which can be attributed to the charge transfer of Ti4+-O2-.Moreover,this phosphor exhibits strong thermal stability.The luminescence emission intensity at 150 C maintained about 91 mol％of its initial value at room temperature.Additionally,the electron transition process and concentration quenching mechanism of CaYAl1-xO4:xTi4+are discussed in detail.The excellent lumi-nescent properties indicate that CaYAl1-xO4:xTi4+phosphor may have promising application in indoor plant cultivation.