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dc.contributor.author박상문-
dc.date.accessioned2015-12-03T01:32:07Z-
dc.date.available2015-12-03T01:32:07Z-
dc.date.issued201411-
dc.identifier.citationVOL 135, 59-62-
dc.identifier.issn0167577X-
dc.identifier.other43225-
dc.identifier.urihttp://pubs.kist.re.kr/handle/201004/48735-
dc.description.abstractCe3+–Mn2+ cooperative barium–yttrium–orthosilicate phosphors composed of Ba9−3m/2−nCemMnnY2Si6O24 (m=0.005–0.4, n=0–0.5) were prepared using a solid-state reaction. The X-ray diffraction patterns of the resultant phosphors were examined to index the peak positions. The photoluminescence (PL) excitation and emission spectra of the Ce3+-activated phosphors were clearly monitored; furthermore, critical emission quenching as a function of Ce3+ content in the Ba9−3m/2CemY2Si6O24 was observed at relatively low concentrations of the activator. After doping the host structure with Ce3+ and Mn2+ emitters, intense blue and red emission lights observed in the PL spectra under near-ultraviolet (NUV) excitation were monitored. The dependence of the luminescent intensity of the Mn2+ co-doped (n=0, 0.1, 0.3, and 0.5) host lattices on Ce3+ content (m=0.025, 0.1, and 0.2) was also investigated. Co-doping Mn2+ into the Ce3+-doped host structure enabled high energy transfer from Ce3+ to Mn2+; this energy transfer mechanism is discussed. Using these phosphors, the desired CIE values including emissions throughout the blue and red regions of the spectra were achieved.-
dc.publisherMaterials letters-
dc.subjectOrthosilicate-
dc.subjectX-raydiffraction-
dc.subjectphosphors-
dc.subjectPhotoluminescence-
dc.subjectEnergy transfer-
dc.titleCe3+-Mn2+ cooperative Ba9Y2Si6O24 orthosilicate phosphors-
dc.typeArticle-
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