Emission characteristics of white light phosphor

Author

Lee, K.M. ; An, Bao-li ; Gong, Meng-lian ; Liu, Ying-liang ; Cheah, K.W.

Author_Institution

Dept. of Phys., Hong Kong Baptist Univ., China

Volume

2

fYear

2003

fDate

15-19 Dec. 2003

Abstract

White light LED was successfully fabricated by converting near-UV LED emission (390-420 nm) with a new white light phosphor. This new white phosphor was consisted of three fluorescence materials; two strontium aluminates based with lanthanide oxides, SrAl₂O₄:Eu²⁺ (for green (520 nm) emission) and Sr₄Al₁₄O₂₅:Eu²⁺ (for blue (490 nm) emission) and new organometallic Eu complex, (for red (614 nm) emission). These materials have good absorption in the 300-500 nm range and have high quantum efficiencies (4.7-24.5%). The white light LED has a CIE value of (0.321, 0.365, 0.314).

Keywords

europium; light emitting diodes; phosphors; strontium compounds; ultraviolet spectra; visible spectra; 300 to 500 nm; 4.7 to 24.5 percent; 490 nm; 520 nm; 614 nm; Sr₄Al₁₄O₂₅:Eu; SrAl₂O₄:Eu; absorption; near-UV LED emission; organometallic Eu complex; quantum efficiencies; strontium aluminates; white light LED; white light phosphor; Chemical engineering; Chemistry; Fluorescence; Light emitting diodes; Light sources; Optical materials; Phosphors; Physics; Stimulated emission; Sun;

fLanguage

English

Publisher

ieee

Conference_Titel

Lasers and Electro-Optics, 2003. CLEO/Pacific Rim 2003. The 5th Pacific Rim Conference on

Print_ISBN

0-7803-7766-4

Type

conf

DOI

10.1109/CLEOPR.2003.1277259

Filename

1277259