Photoluminescence of Bi(2+)-doped BaSO4 as a red phosphor for white LEDs

Opt Express. 2012 Nov 5:20 Suppl 6:A977-83. doi: 10.1364/OE.20.00A977.

Abstract

Bi(2+)-doped BaSO(4) phosphor was synthesized in air via solid state reaction method. Three excitation bands and one emission band were observed at 260 nm ((2)P(1/2) → (2)S(1/2)), 452 nm ((2)P(1/2) → (2)P(3/2)(2)), 592 nm ((2)P(1/2) → (2)P(3/2)(1)), and 627 nm ((2)P(3/2)(1) → (2)P(1/2)), respectively. W-LEDs were demonstrated by using a blend composition of BaSO(4):Bi(2+) and YAG:Ce(3+) hosphors pumped with a 455 nm blue LEDs chip. The results indicate that BaSO(4):Bi(2+) phosphor is suitable as potential red phosphor for application in W-LEDs excited with blue LEDs chip.

Publication types

  • Research Support, Non-U.S. Gov't