Emission color variation of (Ba,Sr)3BP3O 12:Eu2+ phosphors for white light LEDs

Te Wen Kuo*, Wei Ren Liu, Teng-Ming Chen

*Corresponding author for this work

Research output: Contribution to journalArticle

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A series of alkaline earth borophosphate phosphors, (Ba,Sr) 3BP3O12 doped with Eu2+ ions, were synthesized by a solid state reaction. Two emission bands at 465 nm and 520 nm were attributed to the f-d transitions of doped Eu2+ ions occupying in two different cation sites in host lattices and emission color variation was observed by substituting the M2+ sites, which was rationalized in terms of two competing factors of the crystal field strength and bond covalence. Green and bluish-white pc-LEDs were fabricated by combination of a 370 nm near-UV chip and composition-optimized Ba3BP3O 12:Eu2+ and (Ba,Sr)3BP3O 12:Eu2+ phosphors, respectively. The series of phosphors may serve as a promising green and bluish-white luminescent materials used in fabrication of near UV-based white pc-LEDs.

Original languageEnglish
Pages (from-to)1888-1897
Number of pages10
JournalOptics Express
Issue number3
StatePublished - 1 Feb 2010

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