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Sol-gel synthesis and the effect of boron addition on the phosphorescent properties of SrAl2O4:Eu2+,Dy3+ phosphors

Published online by Cambridge University Press:  26 November 2012

I-Cherng Chen  and
Teng-Ming Chen
I-Cherng Chen
Affiliation:
Institute of Applied Chemistry, National Chiao Tung University, Hsinchu 30050, Taiwan, Republic of China
Teng-Ming Chen*
Affiliation:
Institute of Applied Chemistry, National Chiao Tung University, Hsinchu 30050, Taiwan, Republic of China
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

The effects of boron addition on the microstructure and afterglow properties of the long-phosphorescent SrAl2O4:Eu2+,Dy3+ (SAED), synthesized via a novel sol-gel route, were systematically investigated. Significant improvement on luminescence intensity and the lengthening of afterglow persistent time in boron-added SAED (BSAED) phases were observed, as compared to those without boron addition and commercial phosphors. Typical bluish-green emissions attributed to the doublet phosphorescence with wavelengths peaking at 412 and 501 nm for BSAED phase and 398 and 486 nm for the pristine SAED phase were observed. Afterglow with wavelengths peaking at 403 and 485 nm was observed for BSAED phase, whereas that with wavelengths peaking at 486.5 nm was found for the pristine SAED phase, as indicated by time-dependent afterglow decay profiles. Results from scanning electron microscopic morphological studies were used to investigate the modification of microstructure of the BSAED phases.

Type
Articles
Information
Journal of Materials Research , Volume 16 , Issue 3 , March 2001 , pp. 644 - 651
Copyright
Copyright © Materials Research Society 2001

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