Preparation and luminescence properties of spherical Sr4Al14O25: Eu2+ phosphor particles by a liquid synthesis
DC Field | Value | Language |
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dc.contributor.author | Lee, J. | - |
dc.contributor.author | Choi, S. | - |
dc.contributor.author | Nahm, S. | - |
dc.contributor.author | Jung, H.-K. | - |
dc.date.accessioned | 2021-09-05T15:58:05Z | - |
dc.date.available | 2021-09-05T15:58:05Z | - |
dc.date.created | 2021-06-17 | - |
dc.date.issued | 2014 | - |
dc.identifier.issn | 1225-0562 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/100728 | - |
dc.description.abstract | A spherical Sr4Al14O25:Eu2+ phosphor for use in white-light-emitting diodes was synthesized using a liquid-state reaction with two precipitation stages. For the formation of phosphor from a precursor, the calcination temperature was 1,100°C. The particle morphology of the phosphor was changed by controlling the processing conditions. The synthesized phosphor particles were spherical with a narrow size-distribution and had mono-dispersity. Upon excitation at 395 nm, the phosphor exhibited an emission band centered at 497 nm, corresponding to the 4f65d→4f7 electronic transitions of Eu2+. The critical quenching-concentration of Eu2+ in the synthesized Sr4Al14O25:Eu2+ phosphor was 5 mol%. A phosphorconverted LED was fabricated by the combination of the optimized spherical phosphor and a near-UV 390 nm LED chip. When this pc-LED was operated under various forward-bias currents at room temperature, the pc-LED exhibited a bright blue-green emission band, and high color-stability against changes in input power. Accordingly, the prepared spherical phosphor appears to be an excellent candidate for white LED applications. © Materials Research Society of Korea, All rights reserved. | - |
dc.language | Korean | - |
dc.language.iso | ko | - |
dc.publisher | Korea Federation of Science and Technology | - |
dc.subject | Luminescence properties | - |
dc.subject | Phosphor particles | - |
dc.subject | Shape control | - |
dc.title | Preparation and luminescence properties of spherical Sr4Al14O25: Eu2+ phosphor particles by a liquid synthesis | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Nahm, S. | - |
dc.identifier.doi | 10.3740/MRSK.2014.24.7.351 | - |
dc.identifier.scopusid | 2-s2.0-84908539656 | - |
dc.identifier.bibliographicCitation | Korean Journal of Materials Research, v.24, no.7, pp.351 - 356 | - |
dc.relation.isPartOf | Korean Journal of Materials Research | - |
dc.citation.title | Korean Journal of Materials Research | - |
dc.citation.volume | 24 | - |
dc.citation.number | 7 | - |
dc.citation.startPage | 351 | - |
dc.citation.endPage | 356 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.identifier.kciid | ART001896895 | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scopus | - |
dc.description.journalRegisteredClass | kci | - |
dc.subject.keywordPlus | Luminescence properties | - |
dc.subject.keywordPlus | Phosphor particles | - |
dc.subject.keywordPlus | Shape control | - |
dc.subject.keywordAuthor | Co-precipitation | - |
dc.subject.keywordAuthor | Shape control | - |
dc.subject.keywordAuthor | Sr4Al14O25:Eu2+ | - |
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