DC Field | Value | Language |
---|---|---|
dc.contributor.author | Choi, Hyekyoung | ko |
dc.contributor.author | Ko, Jae-Hyeon | ko |
dc.contributor.author | Kim, Yong-Hyun | ko |
dc.contributor.author | Jeong, Sohee | ko |
dc.date.accessioned | 2013-06-07T09:11:48Z | - |
dc.date.available | 2013-06-07T09:11:48Z | - |
dc.date.created | 2013-05-24 | - |
dc.date.created | 2013-05-24 | - |
dc.date.created | 2013-05-24 | - |
dc.date.issued | 2013-04 | - |
dc.identifier.citation | JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, v.135, no.14, pp.5278 - 5281 | - |
dc.identifier.issn | 0002-7863 | - |
dc.identifier.uri | http://hdl.handle.net/10203/173912 | - |
dc.description.abstract | Ambient stability of colloidal nanocrystal quantum dots (QDs) is imperative for low-cost, high-efficiency QD photovoltaics. We synthesized air-stable, ultrasmall PbS QDs with diameter (D) down to 1.5 nm, and found an abrupt transition at D approximate to 4 nm in the air stability as the QD size was varied from 1.5 to 7.5 nm. X-ray photoemission spectroscopy measurements and density functional theory calculations reveal that the stability transition is closely associated with the shape transition of oleate-capped QDs from octahedron to cuboctahedron, driven by steric hindrance and thus size-dependent surface energy of oleate-passivated Pb-rich QD facets. This microscopic understanding of the surface chemistry on ultrasmall QDs, up to a few nanometers, should be very useful for precisely and accurately controlling physicochemical properties of colloidal QDs such as doping polarity, carrier mobility, air stability, and hot-carrier dynamics for solar cell applications. | - |
dc.language | English | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.title | Steric-Hindrance-Driven Shape Transition in PbS Quantum Dots: Understanding Size-Dependent Stability | - |
dc.type | Article | - |
dc.identifier.wosid | 000317548400013 | - |
dc.identifier.scopusid | 2-s2.0-84876018577 | - |
dc.type.rims | ART | - |
dc.citation.volume | 135 | - |
dc.citation.issue | 14 | - |
dc.citation.beginningpage | 5278 | - |
dc.citation.endingpage | 5281 | - |
dc.citation.publicationname | JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | - |
dc.identifier.doi | 10.1021/ja400948t | - |
dc.contributor.localauthor | Kim, Yong-Hyun | - |
dc.contributor.nonIdAuthor | Choi, Hyekyoung | - |
dc.contributor.nonIdAuthor | Ko, Jae-Hyeon | - |
dc.contributor.nonIdAuthor | Jeong, Sohee | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordPlus | JUNCTION SOLAR-CELLS | - |
dc.subject.keywordPlus | NANOCRYSTAL FILMS | - |
dc.subject.keywordPlus | AIR EXPOSURE | - |
dc.subject.keywordPlus | EFFICIENCY | - |
dc.subject.keywordPlus | PHOTOVOLTAICS | - |
dc.subject.keywordPlus | EMISSION | - |
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