New Silicate Phosphors for a White LED

Kenji TODA  Yoshitaka KAWAKAMI  Shin-ichiro KOUSAKA  Yutaka ITO  Akira KOMENO  Kazuyoshi UEMATSU  Mineo SATO 

Publication
IEICE TRANSACTIONS on Electronics  Vol.E89-C  No.10  pp.1406-1412
Publication Date: 2006/10/01
Online ISSN: 1745-1353
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Electronic Displays)
Category: INVITED
Keyword: 
phosphor,  silicate,  white LED, 

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Summary: 
We focus on the development of new silicate phosphors for a white LED. In the europium doped silicate system, four LED phosphor candidates-- Li2SrSiO4:Eu2+, Ba9Sc2Si6O24:Eu2+ , Ca3Si2O7:Eu2+ and Ba2MgSi2O7:Eu2+ were found. Luminescent properties under near UV and visible excitation were investigated for the new Eu2+ doped LED silicate phosphors. These new phosphors have a relatively strong absorption band in a long wavelength region.