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Formation of High-Quality I−III−VI Semiconductor Nanocrystals by Tuning Relative Reactivity of Cationic Precursors
Abstract
A method for the synthesis of nearly monodisperse CuInS(2) semiconductor nanocrystals (from <2 to 20 nm) was developed using generic and air-stable chemicals in a non-coordinating solvent. Such "greener" approaches also allowed the reaction temperatures to be below 200 degrees C. By introducing reactivity-controlling ligands for Cu, namely thiols, control of the Cu:In stoichiometric ratio in the nanocrystals was achieved. Amines were identified as catalytic reagents for the rapid oxidation of the CuInS(2) nanocrystals, which could be prevented by the formation of CuInS(2)/ZnS core/shell nanocrystals by a one-pot approach. CuInS(2)/ZnS core/shell nanocrystals also showed greatly improved optical properties, with photoluminescence quantum yield up to about 30% and an emission peak position tunable from 500 to 950 nm. The versatility of the synthetic strategy was demonstrated by extending it to the synthesis of AgInS(2) nanocrystals by simply replacing the copper salt by a silver salt.
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Citations
Cites
Narayanaswamy, A., Xu, H., Pradhan, N., Kim, M., & Peng, X. (2006) · Journal of the American Chemical Society · doi:10.1021/ja0627601 · Cited by 307
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The Many “Facets” of Halide Ions in the Chemistry of Colloidal Inorganic Nanocrystals
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Optoelectronic Properties of CuInS2 Nanocrystals and Their Origin
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Metadata
- Authors
- Xie, R., Rutherford, M., & Peng, X.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2009-03-30
- Volume
- 131
- Issue
- 15
- Pages
- 5691-5697
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2007456527
- Cited by
- 799
- References
- 1
- FWCI
- 23.93
- Type
- journal article
- Language
- en
- Open access
- closed
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