Luminescence properties and energy transfer in Eu, Mn codoped Na(Sr,Ba)PO phosphor.

Eu and Mn singly doped and codoped Na(Sr,Ba)PO phosphors were synthesized, and their luminescent properties were investigated. A broad blue emission and a broad orange emission band were observed in Na(Sr,Ba)PO:Eu, Mn phosphor. The resonant-type energy transfer from Eu to Mn was demonstrated, and the energy transfer efficiency was also calculated according to their emission spectra. Based on the principle of energy transfer, the emission intensity ration of Eu and Mn could be appropriately tuned by adjusting the contents of activators. Due to the strong absorption in the 250-400 nm range, Na(Sr,Ba)PO:Eu, Mn phosphor could be used as a potential candidate for near-UV white light-emitting diodes (LEDs). [ABSTRACT FROM AUTHOR]