期刊
NANOSCALE
卷 8, 期 19, 页码 10021-10025出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6nr02505f
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资金
- National High Technology Research and Development Program of China (863) [2015AA050602]
- National Natural Science Foundation of China [21403247, 21173228]
Phosphine-free synthesis of CISe quantum dots (QDs) is highly desirable, yet it has been challenging. The main difficulty lies in achieving phosphine-free Se precursors. Most reported protocols for the synthesis of size-confined CISe QDs highly depend on the use of air-sensitive, toxic, and expensive alkylphosphines to prepare reactive Se precursors and to confine particle growth. Herein, we present a new amine/thiol combination-based route to Se precursors that may enable a general synthesis of phosphine-free selenide QDs. What's more, instead of the traditional hotinjection method, we also report the first one-pot noninjection synthesis of high quality CISe QDs enabled by our strategy. A very high chemical yield of similar to 95% is demonstrated, as well as the facile gram-scale production of monodisperse CISe QDs. By simply adjusting the amount of 1-dodecanethiol used in the synthesis, we are able to produce CISe QDs with continuous tunability of the particle size from similar to 2 nm to similar to 10 nm, and hence their intrinsic optical properties.
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