Eu2+-Activated CaSrSiO4: a New Red-Emitting Oxide Phosphor for White-Light-Emitting Diodes

Ca 1-x Sr 1-x Eu 2x SiO 4 (CaSrSiO 4 :Eu 2+ ) phosphors were prepared by a novel aqueous solution technique using propylene glycol-modified silane (PGMS), combined with a freeze-drying process. The precursors were heat-treated under a reducing atmosphere with BaCl 2 flux. X-ray diffraction indicated...

Full description

Saved in:
Bibliographic Details
Published in:Applied physics express 2013-07, Vol.6 (7), p.072101-072101-4
Main Authors: Tezuka, Satoko, Sato, Yasushi, Komukai, Tetsufumi, Takatsuka, Yuji, Kato, Hideki, Kakihana, Masato
Format: Article
Language:English
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Ca 1-x Sr 1-x Eu 2x SiO 4 (CaSrSiO 4 :Eu 2+ ) phosphors were prepared by a novel aqueous solution technique using propylene glycol-modified silane (PGMS), combined with a freeze-drying process. The precursors were heat-treated under a reducing atmosphere with BaCl 2 flux. X-ray diffraction indicated that the obtained phosphors exhibited an $\alpha'$-CaSrSiO 4 structure. The wavelength at the phosphors' maximum emission was systematically shifted beyond 600 nm as the Eu 2+ concentration was increased. The corresponding excitation spectra were extended to the visible light region (400--500 nm) with increasing Eu 2+ concentration. These results implied that CaSrSiO 4 :Eu 2+ is a red-emitting phosphor excited by near-UV and blue-light-emitting diodes.
ISSN:1882-0778
1882-0786
DOI:10.7567/APEX.6.072101