LaMoBO6:Tb3+,Eu3+/Sm3+,Bi3+ yellow phosphors with exceptionally high quantum yields that can be excited by blue light

Abstract

LEDs are currently dominant in the lighting industry. Improving the quantum yield of phosphors is important for the efficient utilization of energy. Herein, we have synthesized rare earth element doped green phosphors LaMoBO₆:Tb³⁺ and yellow phosphors LaMoBO₆:Tb³⁺,Eu³⁺/Sm³⁺, which can be excited by both ultraviolet light and blue light. Co-doping with Bi³⁺ significantly increases the quantum yield of yellow phosphors, and the quantum yield of LaMoBO₆:Tb³⁺,Eu³⁺,Bi³⁺ reaches a maximum value of 92%, which is comparable to those of the state of the art yellow phosphors. These yellow phosphors were combined with ultraviolet LEDs and blue phosphors to form white LEDs. Additionally, these yellow phosphors were combined with visible blue LEDs to form white LEDs. LaMoBO₆:Bi³⁺,Tb³⁺,Eu³⁺/Sm³⁺ yellow phosphors with high quantum yield that can be excited by blue light are competitive candidates for white LED applications.