A water- and sulfurization-free solution route to Cu2-xZn1+xSnS4 |
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| Authors: | Renato D’Angelo Cristy Leonor Azanza Ricardo Alberto Mittiga Paolo Scardi Matteo Leoni |
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| Affiliation: | 1. Department of Civil, Environmental and Mechanical Engineering, University of Trento, via Mesiano, 77, 38123, Trento, TN, Italy
2. ENEA, Casaccia Research Center, Via Anguillarese 301, 00123, Rome, Italy
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| Abstract: | Zinc-rich/copper-poor Cu2-xZn1+xSnS4 (x = 0.2, CZTS) has been successfully produced in film and powder form using two non-aqueous solutions (of metal salts and thiourea) without the need for sulfurization during the annealing phase. A reaction route is proposed and the choices of the solvents (water, ethyleneglycol, ethanol, methanol) and of the tin source (tin chloride pentahydrate or anhydrous) discussed and justified. A pure and coarse-grained material is obtained with a mix of metal salts in methanol and thiourea in ethylene glycol. The tin pentahydrate salt seems a better alternative to the commonly used anhydrous chloride. |
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