Realization of InP/ZnS quantum dots for green, amber and red down-converted LEDs and their color-tunable, four-package white LEDs
DC Field | Value | Language |
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dc.contributor.author | Yang, Su Ji | - |
dc.contributor.author | Oh, Ji Hye | - |
dc.contributor.author | Kim, Sohee | - |
dc.contributor.author | Yang, Heesun | - |
dc.contributor.author | Do, Young Rag | - |
dc.date.available | 2020-07-10T07:41:54Z | - |
dc.date.created | 2020-07-06 | - |
dc.date.issued | 2015 | - |
dc.identifier.issn | 2050-7526 | - |
dc.identifier.uri | https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/10950 | - |
dc.description.abstract | Eco-friendly InP/ZnS quantum dots (QDs) have been synthesized by the conventional hot injection method using a non-toxic and economic P(N(CH3)(2))(3) precursor. The carefully controlled synthesis of a series of InP/ZnS QDs was performed by varying the core-growth temperature and time, the [P]/[In] ratio, and the number of ZnS shell coatings. The full-width at half maximum (FWHM) of the photoluminescence (PL) emission peaks from orange-red InP/ZnS QDs can be reduced from 73 to 56 nm by increasing the [P]/[In] ratio from 1.5 to 3.0. This is because there is concurrent formation of InP nuclei during the step in which excess volatile P-precursor is injected. The triple-shell-coated InP/ZnS core-shell QDs of green (G), yellow (Y), and orange-red (OR) colors reached PL quantum yields as high as 0.50, 0.63, and 0.55; and FWHMs of PL peaks as narrow as 55, 76, and 71 nm, respectively. This is the first realization of a variety of efficient green, amber (A), and red (R) monochromatic, down-converted, light-emitting diodes (DC-LEDs) using InP/ZnS QDs. They are fabricated by simply capping a long-wave pass dichroic filter (LPDF) on top of the LED packing associated with each corresponding InP/ZnS QD. In this study, we also characterized the vision and color performance using luminous efficacy, color-rendering index (CRI), special CRI for a strong red (R-9) and color quality scale of color-tunable, four-package white LEDs. These consisted of InP/ZnS QD-based G, A, and R monochromatic, LPDF-capped DC-LEDs and a blue InGaN LED. The good optical performance of the InP/ZnS QD-based monochromatic DC-LEDs and their four-package white LEDs could provide the possibility of applying environmentally clean InP/ZnS QDs in monochromatic LEDs in the wavelength ranges of the "green gap''; thereby creating high-quality-color, color-tunable, four-package white LEDs. | - |
dc.language | 영어 | - |
dc.language.iso | en | - |
dc.publisher | ROYAL SOC CHEMISTRY | - |
dc.subject | LIGHT-EMITTING-DIODES | - |
dc.subject | PASS FILTER | - |
dc.subject | NANOCRYSTALS | - |
dc.subject | PHOSPHORS | - |
dc.subject | WARM | - |
dc.title | Realization of InP/ZnS quantum dots for green, amber and red down-converted LEDs and their color-tunable, four-package white LEDs | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Yang, Heesun | - |
dc.identifier.doi | 10.1039/c5tc00028a | - |
dc.identifier.scopusid | 2-s2.0-84926614470 | - |
dc.identifier.wosid | 000352288300011 | - |
dc.identifier.bibliographicCitation | JOURNAL OF MATERIALS CHEMISTRY C, v.3, no.15, pp.3582 - 3591 | - |
dc.relation.isPartOf | JOURNAL OF MATERIALS CHEMISTRY C | - |
dc.citation.title | JOURNAL OF MATERIALS CHEMISTRY C | - |
dc.citation.volume | 3 | - |
dc.citation.number | 15 | - |
dc.citation.startPage | 3582 | - |
dc.citation.endPage | 3591 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Materials Science | - |
dc.relation.journalResearchArea | Physics | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Multidisciplinary | - |
dc.relation.journalWebOfScienceCategory | Physics, Applied | - |
dc.subject.keywordPlus | LIGHT-EMITTING-DIODES | - |
dc.subject.keywordPlus | PASS FILTER | - |
dc.subject.keywordPlus | NANOCRYSTALS | - |
dc.subject.keywordPlus | PHOSPHORS | - |
dc.subject.keywordPlus | WARM | - |
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