Photoluminescence properties and energy transfer of novel red phosphor Sr3P4O13:Eu3+, Bi3+

Novel Sr 3 P 4 O 13 :Eu 3+ , Bi 3+ 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 394   nm due to 7 F 0 → 5 L 6 transition indicates that the phosphor can be effectively excited by near-UV InGaN chip, and five PL bands within the range 570–770   nm are attributed to 5 D 0 → 7 F J ( J =1, 2, 3, 4, and 5) transitions of Eu 3+ ion, respectively. The optimal Bi 3+ doping concentration is~5   mol%. PL intensity of Sr 3 P 4 O 13 :0.04Eu 3+ phosphor can be enhanced~7 times by codoping Bi 3+ ion due to the energy transfer between Eu 3+ and Bi 3+ ions. The luminous mechanism and energy transfer process are explained by energy level diagrams of Bi 3+ and Eu 3+ ions.