| Synthesis of blue emitting InP/ZnS quantum dots through control of competition between etching and growth. | |
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MedLine Citation:
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PMID: 23138715 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Blue (<480 nm) emitting Cd-free quantum dots (QDs) are in great demand for various applications. However, their synthesis has been challenging. Here we present blue emitting InP/ZnS core/shell QDs with a band edge emission of 475 nm and a full width at half maximum of 39 nm (215 meV) from their quantum confined states. The drastic temperature drop immediately after mixing of the precursors and holding them at a temperature below 150 °C was the critical factor for the synthesis of blue emitting QDs, because the blue QDs are formed by the etching of ultra-small InP cores by residual acetic acid below 150 °C. Etching was dominant at temperatures below 150 °C, whereas growth was dominant at temperatures above 150 °C. ZnS shells were formed successfully at 150 °C, yielding blue emitting InP/ZnS QDs. The colour of the InP/ZnS QDs depicted on the CIE 1931 chromaticity diagram is located close to the edge, indicating a pure blue colour compared to other InP-based QDs. |
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Authors:
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Kipil Lim; Ho Seong Jang; Kyoungja Woo |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-11-09 |
Journal Detail:
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Title: Nanotechnology Volume: 23 ISSN: 1361-6528 ISO Abbreviation: Nanotechnology Publication Date: 2012 Nov |
Date Detail:
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Created Date: 2012-11-9 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101241272 Medline TA: Nanotechnology Country: - |
Other Details:
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Languages: ENG Pagination: 485609 Citation Subset: - |
Affiliation:
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Molecular Recognition Research Center, Korea Institute of Science and Technology, PO Box 131, Cheongryang, Seoul 130-650, Republic of Korea. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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