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Title: A facile and scalable route to nano-crystallized kesterite Cu{sub 2}ZnSnS{sub 4} fibers via electrospinning/sulfurization

Detailed characterization of the microstructure and its properties have been done on the nanocrystallized CZTS nanofibers fabricated via electrospinning following sulfurization. The fiber growth mechanism is proposed to explain the spontaneous reaction and crystallization of CZTS, as confirmed by the thermodynamic calculations. - Abstract: In this work, we report facile route to quaternary kesterite Cu{sub 2}ZnSnS{sub 4} (CZTS) microfibers through electrospinning method. Precursor fibers are electrospun from the solution composed of Cu(CH{sub 3}COO){sub 2}, Zn(CH{sub 3}COO){sub 2{sup ,}} and SnCl{sub 4} as the solutes, ethylene glycol methyl ether as the solvent, and polyvinylpyrrolidone (PVP) as the plasticizer. CZTS fibers are obtained after annealing at 773 K for 40 min in a sulfur ambient. Characterization including scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and Raman spectra, confirm the formation of single-phased, well-crystallized CZTS fibers, with a band gap of about 1.48 eV estimated from the optical absorption curve. In addition, the fiber growth mechanism is proposed to explain the spontaneous reaction and crystallization of CZTS, as confirmed by the thermodynamic calculations.
Authors:
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Publication Date:
OSTI Identifier:
22420786
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 61; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; COPPER COMPOUNDS; CRYSTALLIZATION; GLYCOLS; METHYL ETHER; MICROSTRUCTURE; NANOFIBERS; OPTICAL PROPERTIES; PVP; RAMAN SPECTRA; SCANNING ELECTRON MICROSCOPY; SEMICONDUCTOR MATERIALS; SOLVENTS; TIN CHLORIDES; TIN SULFIDES; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION; X-RAY PHOTOELECTRON SPECTROSCOPY; ZINC COMPOUNDS