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Journal of Materials Science: Materials in Electronics
Published in: Journal of Materials Science: Materials in Electronics 4/2008

01-04-2008

Synthesis and luminescent properties of Sr4Al14O25:Eu2+ blue–green emitting phosphor for white light-emitting diodes (LEDs)

Authors: Zhanchao Wu, Jianxin Shi, Jing Wang, Menglian Gong, Qiang Su

Published in: Journal of Materials Science: Materials in Electronics | Issue 4/2008

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Abstract

An efficient blue–green emitting phosphor, Sr4Al14O25:Eu2+, was prepared by solid-state reaction. X-ray powder diffraction (XRD) analysis confirmed the formation of Sr4Al14O25:Eu2+. Field-emission scanning electron-microscopy (FE-SEM) observation indicated that the microstructure of the phosphor consisted of irregular fine grains with an average size of about 8–10 μm. Photoluminescence measurements showed a broad absorption band between 300 and 450 nm which was efficiently excited by near-ultraviolet (NUV) LEDs (350–410 nm) and a strong emission band peaking at 491 nm. A bright blue–green LED with chromatic coordination (0.176, 0.412) was fabricated by incorporating the phosphor with an InGaN-based NUV chip, which indicates that Sr4Al14O25:Eu2+ is a good candidate phosphor for application in white LEDs.
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Metadata
Title
Synthesis and luminescent properties of Sr4Al14O25:Eu2+ blue–green emitting phosphor for white light-emitting diodes (LEDs)
Authors
Zhanchao Wu
Jianxin Shi
Jing Wang
Menglian Gong
Qiang Su
Publication date
01-04-2008
Publisher
Springer US
Published in
Journal of Materials Science: Materials in Electronics / Issue 4/2008
Print ISSN: 0957-4522
Electronic ISSN: 1573-482X
DOI
https://doi.org/10.1007/s10854-007-9325-2

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