期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 138, 期 17, 页码 5576-5584出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.5b13288
关键词
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资金
- National Natural Science Foundation of China [21431006]
- Foundation for Innovative Research Groups of the National Natural Science Foundation of China [21521001]
- National Basic Research Program of China [2014CB931800, 2013CB933900]
- Users with Excellence and Scientific Research Grant of Hefei Science Center of CAS [2015HSC-UE007, 2015SRG-HSC038]
Heterocrystalline poly-type nanostructured semiconductors have been attracting more and more attention in recent years due to their novel structures and special interfaces. Up to now, controlled polytypic nanostructures are mostly realized in II-VI and III-V semiconductors. Herein, we report the synthesis and photoelectrochemical properties of Cu-based ternary I-III-VI2 chalcogenide polytypic nanocrystals, with a focus on polytypic CuInS2 (CIS), CuInSe2 (CISe), and CuIn(S0.5Se0.5)(2) alloy nanocrystals. Each obtained polytypic nanocrystal is constructed with a wurtzite hexagonal column and a zinc blende/chalcopyrite cusp, regardless of the S/Se ratio. The growth mechanisms of polytypic CIS and CISe nanocrystals have been studied by time dependent experiments. The polytypic nanocrystals are solution-depositedi on indium tin oxide glass substrate and used as a photoelectrode, thus showing: stable photoelectrochemical activity in aqueous solution. Density functional theory calculation was used to study the electronic structure and the band gap alignment. This versatile synthetic method provides a new route for synthesis of novel polytypic nanostructured semiconductors with unique properties.
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