Title: Emission color variation of (Ba,Sr)(3)BP(3)O(12):Eu(2+) phosphors for white light LEDs
Authors: Kuo, Te-Wen
Liu, Wei-Ren
Chen, Teng-Ming
Department of Applied Chemistry
Issue Date: 1-Feb-2010
Abstract: A series of alkaline earth borophosphate phosphors, (Ba,Sr)(3)BP(3)O(12) doped with Eu(2+) 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 Eu(2+) ions occupying in two different cation sites in host lattices and emission color variation was observed by substituting the M(2+) 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 Ba(3)BP(3)O(12):Eu(2+) and (Ba,Sr)(3)BP(3)O(12):Eu(2+) 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. (C) 2010 Optical Society of America
URI: http://dx.doi.org/10.1364/OE.18.001888
ISSN: 1094-4087
DOI: 10.1364/OE.18.001888
Volume: 18
Issue: 3
Begin Page: 1888
End Page: 1897
Appears in Collections:Articles