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Energy Express

Energy Express

  • Editor: Bernard Kippelen
  • Vol. 19, Iss. S1 — Jan. 3, 2011
  • pp: A1–A6

Thermally stable green Ba3Y(PO4)3:Ce3+,Tb3+ and red Ca3Y(AlO)3(BO3)4:Eu3+ phosphors for white-light fluorescent lamps

Chien-Hao Huang, Te-Wen Kuo, and Teng-Ming Chen  »View Author Affiliations


Optics Express, Vol. 19, Issue S1, pp. A1-A6 (2011)
http://dx.doi.org/10.1364/OE.19.0000A1


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Abstract

A class of thermal stable of green-emitting phosphors Ba3Y(PO4)3:Ce3+,Tb3+ (BYP:Ce3+,Tb3+) and red-emitting phosphors Ca3Y(AlO)3(BO3)4:Eu3+ (CYAB:Eu3+) for white-light fluorescent lamps were synthesized by high temperature solid-state reaction. We observed a decay of only 3% at 150 °C for BYP:0.25Ce3+,0.25Tb3+ (3% for LaPO4:Ce3+,Tb3+), and a decay of 4% for CYAB:0.5Eu3+ (7% for Y2O3:Eu3+, 24% for Y2O2S:Eu3+). The emission intensity of composition-optimized Ba3(Y0.5Ce0.25Tb0.25)(PO4)3 is 70% of that of commercial LaPO4:Ce3+,Tb3+ phosphors, and the CIE chromaticity coordinates are found to be (0.323, 0.534). The emission intensity of Ca3(Y0.5Eu0.5)(AlO)3(BO3)4 is 70% and 83% of those of Y2O3:Eu3+ and Y2O2S:Eu3+ phosphors, respectively, and the CIE chromaticity coordinates are redder (0.652, 0.342) than those of Y2O3:Eu3+ (0.645, 0.347) and Y2O2S:Eu3+ (0.647, 0.343). A white-light fluorescent lamp is fabricated using composition-optimized Ba3(Y0.5Ce0.25Tb0.25)(PO4)3 and Ca3(Y0.5Eu0.5)(AlO)3(BO3)4 phosphors and matching blue-emitting phosphors. The results indicate that the quality of the brightness and color reproduction is suitable for application in shortwave UV fluorescent lamps. The white-light fluorescent lamp displays CIE chromaticity coordinates of x = 0.33, y = 0.35, a warm white light with a correlated color temperature of 5646 K, and a color-rendering index of Ra = 70.

© 2010 OSA

OCIS Codes
(160.2540) Materials : Fluorescent and luminescent materials
(250.5230) Optoelectronics : Photoluminescence
(300.6280) Spectroscopy : Spectroscopy, fluorescence and luminescence

ToC Category:
Fluorescent Luminescent Materials

History
Original Manuscript: August 11, 2010
Revised Manuscript: October 6, 2010
Manuscript Accepted: October 8, 2010
Published: November 16, 2010

Citation
Chien-Hao Huang, Te-Wen Kuo, and Teng-Ming Chen, "Thermally stable green Ba3Y(PO4)3:Ce3+,Tb3+ and red Ca3Y(AlO)3(BO3)4:Eu3+ phosphors for white-light fluorescent lamps," Opt. Express 19, A1-A6 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-S1-A1


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