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Gram-Scale One-Pot Synthesis of Highly Luminescent Blue Emitting Cd1-xZnxS/ZnS Nanocrystals
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Bae, Wan Ki | - |
dc.contributor.author | Nam, Min Ki | - |
dc.contributor.author | Char, Kookheon | - |
dc.contributor.author | Lee, Seonghoon | - |
dc.date.accessioned | 2009-07-19T23:14:42Z | - |
dc.date.available | 2009-07-19T23:14:42Z | - |
dc.date.issued | 2008-08-02 | - |
dc.identifier.citation | Chem. Mater. 2008, 20, 5307–5313 | en |
dc.identifier.issn | 0897-4756 (print) | - |
dc.identifier.issn | 1520-5002 (online) | - |
dc.identifier.uri | https://hdl.handle.net/10371/5723 | - |
dc.description.abstract | We demonstrated a facile synthesis of highly luminescent blue emitting Cd1-xZnxS/ZnS core/shell structured nanocrystals (NCs) in straightforward and reproducible manner. The alloyed Cd1-xZnxS cores with homogeneity in both size and composition were prepared by introducing S precursors (S dissolved in the noncoordinating solvent (1-octadecene)) into the mixed solution of Cd-Oleate (Cd(OA)2) and Zn-Oleate (Zn(OA)2) at elevated temperature (300 °C). ZnS shells were successively overcoated on the prepared cores by the second injection of S precursors (S powder dissolved in tributylphosphine, TBPS) directly into the reactor with existing alloyed Cd1-xZnxS NC cores without any purification steps. The prepared NCs exhibit strong band edge emission with high photoluminescent quantum yield (PL QY, up to 80%) and narrow spectral bandwidth (fwhm < 25 nm), which is believed to originate from the successful growth of ZnS shell layers on the Cd1-xZnxS cores and the interfacial compatibility between Cd1-xZnxS cores and the ZnS shell layers through the intradiffusion of Zn atoms from the ZnS shells into the Cd1-xZnxS cores during the shell formation reaction. The emission wavelength (PL λmax.) of Cd1-xZnxS/ZnS core/shell NCs was finely tuned from violet (415 nm) to blue (461 nm) by adjusting the amount of S precursors in the first injection (S in 1-octadecene) and thus changing actual Cd content ratio in the alloyed Cd1-xZnxS
cores (0.49 e x e 0.76). Furthermore, multigram (3 g) scale production of Cd1-xZnxS/ZnS core/shell NCs with narrow size distribution and spectral bandwidth was also demonstrated. | en |
dc.description.sponsorship | We thank Bonghwan Chon and Taiha Joo at POSTECH for their time-resolved photoluminescence decay profile measurement. This work was financially supported by the Korea Science and Engineering Foundation (KOSEF) through CNNC, the Acceleration Research Program, and the NANO Systems Institute-National Core Research Program (NSINCRC). This work was supported in part by MOE through BK21 program and Seoul R&BD program. | en |
dc.language.iso | en | en |
dc.publisher | American Chemical Society | en |
dc.title | Gram-Scale One-Pot Synthesis of Highly Luminescent Blue Emitting Cd1-xZnxS/ZnS Nanocrystals | en |
dc.type | Article | en |
dc.contributor.AlternativeAuthor | 배완기 | - |
dc.contributor.AlternativeAuthor | 남민기 | - |
dc.contributor.AlternativeAuthor | 차국헌 | - |
dc.contributor.AlternativeAuthor | 이성훈 | - |
dc.identifier.doi | 10.1021/cm801201x | - |
dc.citation.journaltitle | Chemistry of Materials | - |
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