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Insight into the crystal phase and shape evolution from monoclinic Cu1.94S to wurtzite Cu2ZnSnS4 nanocrystals

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Abstract

Phase pure wurtzite Cu2ZnSnS4 (CZTS) nanocrystals have been prepared by using monoclinic Cu1.94S nanoplates as starting materials via a hot-injection method. The rapid injection of Zn-thiols resulted in the symmetrical growth of CZTS onto both sides of Cu1.94S nanoplates, yielding sandwich-like CZTS-Cu1.94S heterostructures, which finally converted into CZTS nanocrystals. Interestingly, with 50% excess Sn precursor in the initial reaction system, the morphology of CZTS can retain the shape of nanoplates with increased thickness. The morphology and crystal phase evolution processes have been further investigated to understand the formation mechanism. These findings are meaningful for the controllable synthesis of copper chalcogenide nanocrystals as well as their photoelectrical applications.

Graphical abstract: Insight into the crystal phase and shape evolution from monoclinic Cu1.94S to wurtzite Cu2ZnSnS4 nanocrystals

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Publication details

The article was received on 11 Jan 2018, accepted on 20 Mar 2018 and first published on 21 Mar 2018


Article type: Communication
DOI: 10.1039/C8CE00048D
Citation: CrystEngComm, 2018, Advance Article
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    Insight into the crystal phase and shape evolution from monoclinic Cu1.94S to wurtzite Cu2ZnSnS4 nanocrystals

    X. Zhang, Y. Xu, C. Pang, Y. Wang, L. Shen, A. Gupta and N. Bao, CrystEngComm, 2018, Advance Article , DOI: 10.1039/C8CE00048D

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