Self-Quenching Origin of Carbon Dots and the Guideline for Their Solid-State Luminescence

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dc.contributor.authorYoo, Hyo Jeongko
dc.contributor.authorKwak, Byeong Eunko
dc.contributor.authorDo Hyun Kimko
dc.date.accessioned2019-12-13T07:21:43Z-
dc.date.available2019-12-13T07:21:43Z-
dc.date.created2019-12-02-
dc.date.issued2019-11-
dc.identifier.citationJOURNAL OF PHYSICAL CHEMISTRY C, v.123, no.44, pp.27124 - 27131-
dc.identifier.issn1932-7447-
dc.identifier.urihttp://hdl.handle.net/10203/268861-
dc.description.abstractRealization of luminescent carbon dots (CDs) in the solid state has been a critical issue for their applications in various fields, such as optoelectronic devices and inkjet printing. However, luminescence self-quenching of CDs in an aggregated state limits the development of their applications necessarily demanding solid-state phosphors. Here, we report the origin of luminescence quenching of CDs in terms of the sp(2) domain content, and we realized the solid-state luminescent CDs by controlling the degree of crystallinity. We compared self-quenched CDs. and self-quenching-resistant CDs with structural analysis and figured out that a high mass ratio of urea regulated the amount of the sp(2) domain in CDs, exhibiting yellow emission at 530 nm in a solid state. We also confirmed that through the carbonization time control, reducing the degree of crystallinity in CDs enabled initially nonluminescent CDs to show a quantum yield of 7.8% at 518 nm in the solid state, providing antiself-quenching property. This research would open the way to the development of solid-state CDs and their applications.-
dc.languageEnglish-
dc.publisherAMER CHEMICAL SOC-
dc.titleSelf-Quenching Origin of Carbon Dots and the Guideline for Their Solid-State Luminescence-
dc.typeArticle-
dc.identifier.wosid000495772100043-
dc.identifier.scopusid2-s2.0-85074426742-
dc.type.rimsART-
dc.citation.volume123-
dc.citation.issue44-
dc.citation.beginningpage27124-
dc.citation.endingpage27131-
dc.citation.publicationnameJOURNAL OF PHYSICAL CHEMISTRY C-
dc.identifier.doi10.1021/acs.jpcc.9b06154-
dc.contributor.localauthorDo Hyun Kim-
dc.description.isOpenAccessN-
dc.type.journalArticleArticle-
dc.subject.keywordPlusGRAPHENE QUANTUM DOTS-
dc.subject.keywordPlusRESONANCE ENERGY-TRANSFER-
dc.subject.keywordPlusLIGHT-EMITTING DEVICES-
dc.subject.keywordPlusCITRIC-ACID-
dc.subject.keywordPlusFORMATION MECHANISM-
dc.subject.keywordPlusFLUORESCENCE-
dc.subject.keywordPlusPHOTOLUMINESCENCE-
dc.subject.keywordPlusGREEN-
dc.subject.keywordPlusEMISSION-
dc.subject.keywordPlusMULTICOLOR-
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