Influence of Gd3+ doping on the luminescent of Sr2P2O7:Eu3+ orange-red phosphors

A novel orange-red emitting Sr2P2O7:Eu3+, Gd3+ phosphor was synthesized by a traditional solid state reaction method in air atmosphere. The phase, photoluminescence properties, energy transfer and fluorescent thermal stability of as-prepared samples were investigated. Sr2P2O7 phase has a 3D-network structure, where [P2O7] groups connect with each other by corner sharing and Sr2+ ions locate at the polyhedral form in the P-O network. The orange-red emitting luminescence from Eu3+ with the aid of efficient energy transfer between Eu3+ and Gd3+ have been discussed in detail. Sr2P2O7:Eu3+, Gd3+ phosphor shows bright orange-red emission from Eu3+ with peaks around 592 nm and 613 nm under ultraviolet excitation. The novel phosphor showed weak thermal quenching and excellent luminescence properties, and are therefore of high potential as orange-red phosphor in lighting field.