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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한양대학교 세라믹공정연구센터 Journal of Ceramic Processing Research Journal of Ceramic Processing Research 제17권 제7호
- 발행연도
- 2016.7
- 수록면
- 752 - 757 (6page)
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초록· 키워드
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Gd2O2S : Eu3+ hollow spheres were successfully synthesized through a hydrothermal method assisting with reduction routefrom commercially available Gd2O3, Eu2O3, HNO3, (NH4)2SO4 and CO(NH2)2 (urea) as the starting materials. The assynthesizedproducts were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR),scanning electron microscopy (SEM), field emission scanning electron microscopy (FE-SEM) and photoluminescence (PL)spectra. The XRD and FT-IR results demonstrate that the precursor has highly crystalline in nature and could be convertedinto pure Gd2O2S phase at 800 oC for 2 hrs in the hybrid atmosphere of flowing argon and hydrogen (90%Ar + 10%H2). SEMand FE-SEM observations show that the obtained Gd2O2S particles possess hollow sphere structure, which has a typical sizeof about 10 μm in diameter and about 1 μm in shell thickness. PL spectroscopy reveals that the strongest red emission peakis located at 628 nm under 277 nm and 330 nm UV light excitation for the Gd2O2S : Eu3+ (5%mol) hollow spheres, whichcorresponds to the 5D0 → 7F2 transition of Eu3+ ions. Decay study demonstrates that the 5D0 → 7F2 transition of Eu3+ ions hasa single exponential decay behavior. The fitting result shows the lifetime for the 5D0 → 7F2 transition under 277 nm and 330 nmUV light excitation is 0.5692 ms and 0.5435 nm, respectively.
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