Abstract
Novel Sr3P4O13:Eu3+, Bi3+ red phosphor is synthesized by a solid-state reaction method in air, and the crystal structures, fluorescence lifetimes and luminescence properties are investigated. The PLE band peaking at 394nm due to 7F0→5L6 transition indicates that the phosphor can be effectively excited by near-UV InGaN chip, and five PL bands within the range 570–770nm are attributed to 5D0→7FJ (J=1, 2, 3, 4, and 5) transitions of Eu3+ ion, respectively. The optimal Bi3+ doping concentration is~5mol%. PL intensity of Sr3P4O13:0.04Eu3+ phosphor can be enhanced~7 times by codoping Bi3+ ion due to the energy transfer between Eu3+ and Bi3+ ions. The luminous mechanism and energy transfer process are explained by energy level diagrams of Bi3+ and Eu3+ ions.
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