A white light emitting phosphor Sr1.5Ca0.5SiO4:Eu3+, Tb3+, Eu2+ for LED-based near-UV chip: Preparation, characterization and luminescent mechanism

► This work details the synthesis in obtaining Sr1.5Ca0.5SiO4 phosphors co-doped with Eu3+, Tb3+ and Eu2+ (SCS:ETE). ► White-light emission can be turned by the concentration of co-doping Eu3+ and Tb3+ ions. ► White emission of SCS:1.0%Eu3+, 0.07%Tb3+ phosphor is very close to the standard white.