Photoluminescence properties of Dy3+/Sm3+ co-doped gallium silicate glass–ceramics for solid-state warm white lighting

•A novel Dy3+/Sm3+ co-doped gallium silicate glass-ceramic for indoor warm white light illumination was prepared. The matrix components are 43SrCO3+7Nb2O5+21Ga2O3+29SiO2.•The glass-ceramic has good thermal stability.•This glass-ceramic maintains good transparency in the visible light range (The transmittance is about 60 %, after the heat treatment at 830℃/ 2 h).•Multiple energy transfer channels exist between Dy3+ and Sm3+ ions.•These glass-ceramics have potential applications in indoor warm white lighting.