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- Title
Efficient Thermolysis Route to Monodisperse Cu<sub>2</sub>ZnSnS<sub>4</sub> Nanocrystals with Controlled Shape and Structure.
- Authors
Xiaoyan Zhang; Guobiao Guo; Cheng Ji; Kai Huang; Chenyang Zha; Yifeng Wang; Liming Shen; Gupta, Arunava; Ningzhong Bao
- Abstract
Monodisperse Cu2ZnSnS4 (CZTS) nanocrystals with tunable shape, crystalline phase, and composition are synthesized by efficient thermolysis of a single source precursor of mixed metal-oleate complexes in hot organic solvents with dissolved sulfur sources. Suitable tuning of the synthetic conditions and the Cu/(Zn1 Sn) ratio of the precursor has enabled precise control of the crystalline phase in the form of kesterite, or a newly observed wurtzite structure. Nanocrystals with morphology in the form of spherical, rice-like, or rod-like shapes are obtained over a wide range of compositions (0.5 ≤ Cu/(Zn + Sn) ≤ 1.2). Both the final products and intermediates for each shape exhibit consistent composition and structure, indicating homogenous nucleation and growth of single-phase nanocrystals. Thin films prepared from colloidal nanocrystal suspensions display interesting shape-dependent photoresponse behavior under white light illumination from a solar simulator.
- Subjects
UNIFORM polymers; THERMOLYSIS; NANOCRYSTALS; ORGANIC solvents; WURTZITE; THIN films
- Publication
Scientific Reports, 2014, p1
- ISSN
2045-2322
- Publication type
Article
- DOI
10.1038/srep05086