Photoluminescence properties of BaSiF6:Eu3+,Eu3+/K+ and Eu3+/Tb3+ co-doped phosphors

Abstract

A series of BaSiF₆-based rare-earth down-conversion phosphors have been firstly hydrothermally prepared and characterized. Under ultraviolet radiation excitation, BaSiF₆:Eu³⁺ phosphors show the characteristic f–f transitions of Eu³⁺ and give a bright orange-red emission. We found the luminescence quenching concentration was 15%, which is relatively high. To further enhance the luminescence, K⁺ was added as a charge compensator. Furthermore, cold white colour can be obtained by co-doping Tb³⁺ ions.