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학술지 Internal Pressure Effect on Cathodoluminescence Enhancement of ZnS:Mn2+ Synthesized by a Sealed Vessel
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박봉제, 임원빈, 정운진, 서홍석, 안준태, 전덕영
Journal of Materials Research, v.22 no.10, pp.2838-2844
Cambridge Univ. Press
05MB5200, L+ 밴드대 광증폭기용 광섬유 및 소자 개발, 안준태
ZnS:Mn2+ phosphors were synthesized by a modified solid-state reaction method. In the synthesis method, a sealed vessel is used, where heat and pressure are simultaneously utilized. The effects of various synthesis conditions such as temperature, Mn concentration, and pressure on the cathodoluminescence (CL) were investigated. Among them, pressure had an effect on CL property as much as others. It was observed that CL intensities of ZnS:Mn2+ phosphors increased with the increase of pressure and the best sample showed higher intensity than that of a commercial one by 180%. X-ray diffraction (XRD) and electron paramagnetic-resonance (EPR) were used to understand the enhancement. No change of XRD patterns was observed but the full width at half-maximum (FWHM) of the most intense cubic (111) peak of ZnS:Mn2+ decreased with the increase of pressure. EPR signal intensity of Mn2+ increased with the increase of pressure. The improved crystallinity and more substitution of Zn2+ with Mn metal were believed to be responsible for the enhancement. © 2007 Materials Research Society.
KSP 제안 키워드
Full-width at half-maximum(FWHM), Improved crystallinity, Modified solid-state reaction, Signal intensity, Solid-state reaction method, Synthesis Method, Synthesis conditions, X-ray diffraction (xrd), XRD patterns, internal pressure, materials research