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http://dx.doi.org/10.6111/JKCGCT.2013.23.4.195

Luminescence properties of novel Sr-Y-Si-Oxynitride yellow phosphor for LED applications  

Jeong, Ok Geun (Department of Nano Fusion Technology, Pusan National University)
Park, Jong Cheon (Department of Nano Fusion Technology, Pusan National University)
Ryu, Jeong Ho (Department of Materials Science and Engineering, Korea National University of Transportation)
Cho, Hyun (Department of Nanomechatronics Engineering, Pusan National University)
Publication Information
Journal of the Korean Crystal Growth and Crystal Technology / v.23, no.4, 2013 , pp. 195-200 More about this Journal
Abstract
Novel Sr-Y-Si-Oxynitride yellow phosphors were synthesized and the effect of calcination temperature, reduction temperature and $Eu^{2+}$ concentration on their luminescence properties were studied. Optimal temperature conditions were found to be $1400^{\circ}C$ and $1300^{\circ}C$ for solid-state reaction and reduction, respectively. The synthesized $Ba_9Y_{2+y}Si_6O_{24-3y}N_{3y}:Eu^{2+}$ phosphors showed a single intense broadband emission in the range of 571~587 nm for 450 nm excitation light source. The highest luminescence intensity was obtained with Eu concentration of 3 mol% and concentration quenching was observed beyond 5 mol%. FE-SEM and PSA showed that the synthesized phosphors consists of particles with an average size of ${\sim}8.2{\mu}m$.
Keywords
Sr-Y-Si-oxynitride phosphor; Solid-state reaction; Photoluminescence; Yellow phosphor; Concentration quenching;
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Times Cited By KSCI : 1  (Citation Analysis)
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