Synthesis of Sr2Si5N8:Eu2+ Phosphor for Enhanced Red Emission

Abstract:

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For removing impurities to improve luminescence properties, Eu2+- activated Sr2Si5N8 red phosphor for white light-emitting diodes (LEDs) was prepared by multiple heat-treatment synthesis which includes carbothermal reduction and nitridation. The X-ray diffraction (XRD) patterns were showed the standard single phase of Sr2Si5N8. With an optimized amount of Eu2+ (2 at. %) dopant, the broad excitation band of Sr2Si5N8:Eu2+ indicated that the phosphor was suitable for application of white LEDs with UV or blue chip, and red emission peak at 628 nm in spectra originating from the 4f65d1→4f7 transition of Eu2+ ion. After third heating process, luminescence properties of the obtained phosphor were improved obviously and higher than commercial YAG:Ce3+ phosphor.

Info:

Periodical:

Advanced Materials Research (Volumes 233-235)

Edited by:

Zhong Cao, Lixian Sun, Xueqiang Cao, Yinghe He

Pages:

2705-2709

DOI:

10.4028/www.scientific.net/AMR.233-235.2705

Citation:

V. D. Luong et al., "Synthesis of Sr2Si5N8:Eu2+ Phosphor for Enhanced Red Emission", Advanced Materials Research, Vols. 233-235, pp. 2705-2709, 2011

Online since:

May 2011

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Price:

$35.00

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