Study on the Valence State of Eu Ions in Sr3Al2O6:Eu Phosphor
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概要
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Europium-activated strontium aluminate phosphor, Sr3Al2O6:Eu2+, was prepared by solid-state reaction. The main concerns on the formation of a stable Sr3Al2O6 phase and the complete reduction of europium ions in this crystal phase, which is considered controversial in the literature and is available for white light-emitting-diode application, were addressed. It was found that the single phase of Sr3Al2O6 could be well formed and the valence state of europium ions depended on treatment temperature, flux, reduction gas, and the resultant stiffness of the host lattice. The redshift emission of Eu2+ in the Sr3Al2O6 host was not marked in our experimental regime. However, the green emission of Sr3Al2O6:Eu2+ increased gradually with the mole fraction of Al2O3 to SrCO3 in the starting materials owing to the complete formation of the Sr3Al2O6 phase.
- 2010-04-25
著者
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Kim Kyung
School Of Food Biotechnology Woosong University
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Kim Jin
School Of Biotechnology & Bioengineering Kangwon National University
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Shin Hyun
School of Electrical and Electronic Engineering, Yonsei University, 262 Seongsanno, Seodaemoon-gu, Seoul 120-749, Korea
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Bo Yong
School of Chemical Engineering and Materials Science, Chung-Ang University, Huksuk-dong 221, Dongjak-gu, Seoul 156-756, Korea
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Jae Soo
School of Chemical Engineering and Materials Science, Chung-Ang University, Huksuk-dong 221, Dongjak-gu, Seoul 156-756, Korea
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Kim Kyung
School of Chemical Engineering and Materials Science, Chung-Ang University, 221 Huksuk-dong, Dongjak-gu, Seoul 156-756, Korea
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Kim Jin
School of Advanced Materials Science and Engineering and Center for Advanced Plasma Surface Technology, Sungkyunkwan University, Suwon, Kyunggi-do 440-746, Korea
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Shin Hyun
School of Chemical Engineering and Materials Science, Chung-Ang University, 221 Huksuk-dong, Dongjak-gu, Seoul 156-756, Korea
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Hyun Ho
School of Chemical Engineering and Materials Science, Chung-Ang University, Huksuk-dong 221, Dongjak-gu, Seoul 156-756, Korea
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