Controlling surface defects of non-stoichiometric copper-indium-sulfide quantum dots

Cited 28 time in webofscience Cited 22 time in scopus
  • Hit : 422
  • Download : 0
DC FieldValueLanguage
dc.contributor.authorPark, Jae Chulko
dc.contributor.authorNam, Yoon Sungko
dc.date.accessioned2016-04-20T06:50:21Z-
dc.date.available2016-04-20T06:50:21Z-
dc.date.created2015-11-30-
dc.date.created2015-11-30-
dc.date.created2015-11-30-
dc.date.issued2015-12-
dc.identifier.citationJOURNAL OF COLLOID AND INTERFACE SCIENCE, v.460, pp.173 - 180-
dc.identifier.issn0021-9797-
dc.identifier.urihttp://hdl.handle.net/10203/205519-
dc.description.abstractQuantum dots (QDs) can be used for a wide range of practical applications including solar energy conversion, light-emitting display, bio-imaging, and sensing. However, toxic heavy metal elements of Pb- and Cd-based QDs cause potential environmental problems and limit their wide applicability. To overcome this limitation, CuInS2 (CIS) QDs, which have a bulk bandgap energy of 1.5 eV and relatively high absorptivity, can be a good alternative. However the photoluminescence quantum yield (PLQY) of CIS QDs is too low for practical applications. Here we investigate the effects of experimental factors in the solution synthesis of CIS/ZnS QDs on intrinsic defects and surface defects from photoluminescence (PL) analysis. A heating-up method is used with dodecanethiol as a sulfur source, a ligand, and a medium. The Cu-to-In feeding ratio is changed to control the PL spectrum in the range of visible to near infrared (NIR) frequencies. The PLQY is increased above 40% in all of the ranges through ZnS shell passivation and additional process optimization (e.g., controlled cooling rate and additional feeding of In3+ ion precursor). This work demonstrates the role of intrinsic defects in PL and the importance of suppressing the formation of the surface defects to increase the PLQY.-
dc.languageEnglish-
dc.publisherACADEMIC PRESS INC ELSEVIER SCIENCE-
dc.titleControlling surface defects of non-stoichiometric copper-indium-sulfide quantum dots-
dc.typeArticle-
dc.identifier.wosid000363077800021-
dc.identifier.scopusid2-s2.0-84940021181-
dc.type.rimsART-
dc.citation.volume460-
dc.citation.beginningpage173-
dc.citation.endingpage180-
dc.citation.publicationnameJOURNAL OF COLLOID AND INTERFACE SCIENCE-
dc.identifier.doi10.1016/j.jcis.2015.08.037-
dc.contributor.localauthorNam, Yoon Sung-
dc.description.isOpenAccessN-
dc.type.journalArticleArticle-
dc.subject.keywordAuthorQuantum dots-
dc.subject.keywordAuthorToxic elements-free-
dc.subject.keywordAuthorPhotoluminescence quantum yield-
dc.subject.keywordAuthorCuInS2-
dc.subject.keywordPlusLIGHT-EMITTING-DIODES-
dc.subject.keywordPlusSEMICONDUCTOR NANOCRYSTALS-
dc.subject.keywordPlusOPTICAL-PROPERTIES-
dc.subject.keywordPlusNANOPARTICLES-
dc.subject.keywordPlusNONINJECTION-
dc.subject.keywordPlusYIELD-
dc.subject.keywordPlusWATER-
Appears in Collection
MS-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 28 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0