Insight into the crystal phase and shape evolution from monoclinic Cu1.94S to wurtzite Cu2ZnSnS4 nanocrystals. Issue 17 (23rd April 2018)

• Record Type: Journal Article
• Authors: Zhang, Xiaoyan; Xu, You; Pang, Chao; Wang, Yifeng; Shen, Liming; Gupta, Arunava; Bao, Ningzhong
• Is Part Of: CrystEngComm. Volume 20:Issue 17(2018)
• Page Start: 2351
• Page End: 2356
• Publication Date: 2018-04-23
• Subjects: Crystals -- Periodicals; Crystal growth -- Periodicals; Crystallography -- Periodicals; Cristaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Cristallographie -- Périodiques; 548
• DOI: 10.1039/c8ce00048d
• Languages: English
• ISSNs: 1466-8033

Abstract

Abstract : The Sn content greatly influences the morphology of CZTS NCs when using Cu1.94 S nanoplates as starting materials. Abstract : Phase pure wurtzite Cu2 ZnSnS4 (CZTS) nanocrystals have been prepared by using monoclinic Cu1.94 S 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 Cu1.94 S nanoplates, yielding sandwich-like CZTS-Cu1.94 S 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.