Low thermal quenching and high-efficiency Ce3+, Tb3+-co-doped Ca3Sc2Si3O12 green phosphor for white light-emitting diodes

► Ca3Sc2Si3O12:1%Ce3+, 0.5%Tb3+ phosphor was prepared by the solid state method. ► Luminescence intensity of Ca3Sc2Si3O12:1%Ce3+, 0.5%Tb3+ phosphor even does not decrease when temperature increases. ► Green LED fabricated with the Ca3Sc2Si3O12:1%Ce3+, 0.5%Tb3+ phosphor shows much smaller decay than that of the commercial YAG:Ce3+ phosphor.