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dc.contributor.authorHuang, Chien-Haoen_US
dc.contributor.authorChiu, Yi-Chenen_US
dc.contributor.authorYeh, Yao-Tsungen_US
dc.contributor.authorChan, Ting-Shanen_US
dc.contributor.authorChen, Teng-Mingen_US
dc.date.accessioned2014-12-08T15:29:01Z-
dc.date.available2014-12-08T15:29:01Z-
dc.date.issued2012-12-01en_US
dc.identifier.issn1944-8244en_US
dc.identifier.urihttp://dx.doi.org/10.1021/am302014een_US
dc.identifier.urihttp://hdl.handle.net/11536/20922-
dc.description.abstractThe crystal structure of Eu2+-activated Sr8ZnSc(PO4)(7):Eu2+ phosphor was refined and determined from XRD profiles by the Rietveld refinement method using a synchrotron light source. This phosphor crystallizes in the monoclinic structure with the I2/a space group. The SZSP:xEu(2+) phosphors showed a broad yellow emission band centered at 511 and 571 nm depending on the concentration of Eu2+, and the composition-optimized concentration of Eu2+ in the Sr8ZnSc(PO4)(7):Eu2+ phosphor was determined to be 2 mol %. The estimated crystal-field splitting and CIE chromaticity coordinates of Sr8ZnSc(PO4)(7):xEu(2+) (x = 0.001-0.05 mol) were 20181-20983 cm(-1) and (0.3835, 0.5074) to (0.4221, 0.5012), respectively, and the emission band showed a redshift from 547 to 571 nm with increasing Eu2+ concentration. The nonradiative transitions between the Eu2+ ions in the Sr8ZnSc(PO4)(7) host were attributable to dipole-dipole interactions, and the critical distance was approximately 19.8 angstrom. The combination of a 400 nm NUV chip with a blend of Sr8ZnSc(PO4)(7):0.02Eu(2+) and BAM:Eu2+ phosphors (light converters) gave high color rendering indices between 79.38 and 92.88, correlated color temperatures between 4325 and 7937 K, and tuned CIE chromaticity coordinates in the range (0.381, 0.435) to (0.294, 0.310), respectively, depending on the SZSP:0.02Eu(2+)/BAM:Eu2+ weight ratio. These results suggest that the Sr8ZnSc(PO4)(7):0.02Eu(2+)/BAM:Eu2+ phosphor blend has potential applications in white NUV LEDs.en_US
dc.language.isoen_USen_US
dc.subjectSr8ZnSc(PO4)(7)en_US
dc.subjectyellow-emittingen_US
dc.subjectEu2+en_US
dc.subjectNUVen_US
dc.subjectwhite LEDen_US
dc.subjectphotoluminescenceen_US
dc.titleEu2+-Activated Sr8ZnSc(PO4)(7): A Novel Near-Ultraviolet Converting Yellow-Emitting Phosphor for White Light-Emitting Diodesen_US
dc.typeArticleen_US
dc.identifier.doi10.1021/am302014een_US
dc.identifier.journalACS APPLIED MATERIALS & INTERFACESen_US
dc.citation.volume4en_US
dc.citation.issue12en_US
dc.citation.spage6661en_US
dc.citation.epage6667en_US
dc.contributor.department應用化學系zh_TW
dc.contributor.departmentDepartment of Applied Chemistryen_US
dc.identifier.wosnumberWOS:000313149800037-
dc.citation.woscount17-
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