Ultrastable PbSe Nanocrystal Quantum Dots via in Situ Formation of Atomically Thin Halide Adlayers on PbSe(100)

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dc.contributor.authorWoo, Ju Youngko
dc.contributor.authorKo, Jae Hyeonko
dc.contributor.authorSong, Jung Hoonko
dc.contributor.authorKim, Kyungnamko
dc.contributor.authorChoi, Hyekyoungko
dc.contributor.authorKim, Yong-Hyunko
dc.contributor.authorLee, DohChangko
dc.contributor.authorJeong, Soheeko
dc.date.accessioned2014-09-04T08:26:01Z-
dc.date.available2014-09-04T08:26:01Z-
dc.date.created2014-08-04-
dc.date.created2014-08-04-
dc.date.issued2014-06-
dc.identifier.citationJOURNAL OF THE AMERICAN CHEMICAL SOCIETY, v.136, no.25, pp.8883 - 8886-
dc.identifier.issn0002-7863-
dc.identifier.urihttp://hdl.handle.net/10203/189987-
dc.description.abstractThe fast degradation of lead selenide (PbSe) nanocrystal quantum dots (NQDs) in ambient conditions impedes widespread deployment of the highly excitonic, thus versatile, colloidal NQDs. Here we report a simple in situ post-synthetic halide salt treatment that results in size-independent air stability of PbSe NQDs without significantly altering their optoelectronic characteristics. From TEM, NMR, and XPS results and DFT calculations, we propose that the unprecedented size-independent air stability of the PbSe NQDs can be attributed to the successful passivation of under-coordinated PbSe(100) facets with atomically thin PbX2 (X = Cl, Br, I) adlayers. Conductive films made of halide-treated ultrastable PbSe NQDs exhibit markedly improved air stability and behave as an n-type channel in a field-effect transistor. Our simple in situ wet-chemical passivation scheme will enable broader utilization of PbSe NQDs in ambient conditions in many optoelectronic applications.-
dc.languageEnglish-
dc.publisherAMER CHEMICAL SOC-
dc.subjectSOLAR-CELLS-
dc.subjectSEMICONDUCTOR NANOCRYSTALS-
dc.subjectELECTRICAL-PROPERTIES-
dc.subjectLIGAND-EXCHANGE-
dc.subjectPASSIVATION-
dc.subjectCHEMISTRY-
dc.subjectEMISSION-
dc.subjectSELENIDE-
dc.subjectSOLIDS-
dc.subjectBRIGHT-
dc.titleUltrastable PbSe Nanocrystal Quantum Dots via in Situ Formation of Atomically Thin Halide Adlayers on PbSe(100)-
dc.typeArticle-
dc.identifier.wosid000338184200012-
dc.identifier.scopusid2-s2.0-84903287313-
dc.type.rimsART-
dc.citation.volume136-
dc.citation.issue25-
dc.citation.beginningpage8883-
dc.citation.endingpage8886-
dc.citation.publicationnameJOURNAL OF THE AMERICAN CHEMICAL SOCIETY-
dc.identifier.doi10.1021/ja503957r-
dc.contributor.localauthorKim, Yong-Hyun-
dc.contributor.localauthorLee, DohChang-
dc.contributor.nonIdAuthorKim, Kyungnam-
dc.contributor.nonIdAuthorChoi, Hyekyoung-
dc.contributor.nonIdAuthorJeong, Sohee-
dc.type.journalArticleArticle-
dc.subject.keywordPlusSOLAR-CELLS-
dc.subject.keywordPlusSEMICONDUCTOR NANOCRYSTALS-
dc.subject.keywordPlusELECTRICAL-PROPERTIES-
dc.subject.keywordPlusLIGAND-EXCHANGE-
dc.subject.keywordPlusPASSIVATION-
dc.subject.keywordPlusCHEMISTRY-
dc.subject.keywordPlusEMISSION-
dc.subject.keywordPlusSELENIDE-
dc.subject.keywordPlusSOLIDS-
dc.subject.keywordPlusBRIGHT-
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