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DC Field | Value | Language |
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dc.citation.startPage | 163213 | - |
dc.citation.title | JOURNAL OF ALLOYS AND COMPOUNDS | - |
dc.citation.volume | 897 | - |
dc.contributor.author | Shin, Seungyong | - |
dc.contributor.author | Yang, Sungjun | - |
dc.contributor.author | Lee, Seong-hun | - |
dc.contributor.author | Shin, Tae Joo | - |
dc.contributor.author | Park, Sangmoon | - |
dc.date.accessioned | 2023-12-21T14:36:52Z | - |
dc.date.available | 2023-12-21T14:36:52Z | - |
dc.date.created | 2022-03-03 | - |
dc.date.issued | 2022-03 | - |
dc.description.abstract | In this study, barium yttrium orthogermanate luminescent host was prepared by a solid-state method using LiCl flux and combined with Ce3+-doped phosphor-converted light-emitting diodes (pc-LEDs) under blue excitation. The structure of Ba9Y2(GeO4)(6) (Ba9Y2Ge6O24) was determined with the use of synchrotron X-ray powder diffraction. The compound crystallized in trigonal unit cell (R (3) over barH), which contains 12-, 9-, and 10-coordinated Ba sites with isolated tetrahedral Ge-O4 and octahedral Y-O6 polyhedrons. The X-ray diffraction patterns, photoluminescence spectra, defect characterization results, Gaussian deconvolution of fitting emission bands, ligand-field splitting parameters, D-band edge positions, distortion values, cation occupancy results, and scanning electron microscopy images of the Ce3+-doped phosphors were characterized to figure out the specific origin of the green-yellow luminescence under blue excitation. The white emission spectra, color-rendering index, correlated color temperature, Commission Internationale de l'Eclairage coordinates and internal quantum efficiency of Ba8.8Ce0.1Na0.1Y2Ge6O24 phosphors on a blue LED chip were measured. Finally, the valence states of Gel' ions in the Ba8.8Ce0.1Na0.1Y2Ge6O24 phosphors were determined by the extended X-ray absorption fine structure analysis at the Ge K-edge to elucidate the luminescence loss under a strong reduction atmosphere. (C) 2021 Elsevier B.V. All rights reserved. | - |
dc.identifier.bibliographicCitation | JOURNAL OF ALLOYS AND COMPOUNDS, v.897, pp.163213 | - |
dc.identifier.doi | 10.1016/j.jallcom.2021.163213 | - |
dc.identifier.issn | 0925-8388 | - |
dc.identifier.scopusid | 2-s2.0-85121119094 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/58448 | - |
dc.identifier.url | https://linkinghub.elsevier.com/retrieve/pii/S0925838821046235 | - |
dc.identifier.wosid | 000753449400005 | - |
dc.language | 영어 | - |
dc.publisher | ELSEVIER SCIENCE SA | - |
dc.title | Distinctive occurrences of green-yellow luminescence from orthogermanate-type Ba9Y2(GeO4)(6):Ce3+, Na+ phosphors under blue excitation and white-light performance with light-emitting diodes | - |
dc.type | Article | - |
dc.description.isOpenAccess | FALSE | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering | - |
dc.relation.journalResearchArea | Chemistry; Materials Science; Metallurgy & Metallurgical Engineering | - |
dc.type.docType | Article | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordAuthor | Orthogermanate | - |
dc.subject.keywordAuthor | X-ray diffraction | - |
dc.subject.keywordAuthor | Phosphors | - |
dc.subject.keywordAuthor | Pc-LED | - |
dc.subject.keywordPlus | PHOTOLUMINESCENCE | - |
dc.subject.keywordPlus | EMISSION | - |
dc.subject.keywordPlus | SILICATE | - |
dc.subject.keywordPlus | ENERGY | - |
dc.subject.keywordPlus | EU2+ | - |
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