Structure and photoluminescence studies of orange-red emitting Y 3 GaO 6 :Sm 3+ nanophosphors for lighting applications

ions was found to be optimal, which produced maximum orange emission. Photoluminescence (PL) observations revealed that dipole-dipole interactions were responsible for the concentration quenching phenomenon. The measured color coordinates for all materials lie in the orange-red region of the CIE triangle, making them suitable for lighting applications.