Facile and Robust Solvothermal Synthesis of Nanocrystalline CuInS2 Thin Films
AbstractThis work demonstrates that the solvothermal synthesis of nanocrystalline CuInS2 thin films using the amino acid l-cysteine as sulfur source is facile and robust against variation of reaction time and temperature. Synthesis was carried out in a reaction time range of 3–48 h (at 150 °C) and a reaction temperature range of 100–190 °C (for 18 h). It was found that at least a time of 6 h and a temperature of 140 °C is needed to produce pure nanocrystalline CuInS2 thin films as proven by X-ray and electron diffraction, high-resolution transmission electron microscopy, and energy-dispersive X-ray spectroscopy. Using UV-vis spectroscopy, a good absorption behavior as well as direct band gaps between 1.46 and 1.55 eV have been determined for all grown films. Only for a reaction time of 3 h and temperatures below 140 °C CuInS2 is not formed. This is attributed to the formation of metal ion complexes with l-cysteine and the overall slow assembly of CuInS2. This study reveals that the reaction parameters can be chosen relatively free; the reaction is completely nontoxic and precursors and solvents are rather cheap, which makes this synthesis route interesting for industrial up scaling. View Full-Text
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Frank, A.; Grunwald, J.; Breitbach, B.; Scheu, C. Facile and Robust Solvothermal Synthesis of Nanocrystalline CuInS2 Thin Films. Nanomaterials 2018, 8, 405.
Frank A, Grunwald J, Breitbach B, Scheu C. Facile and Robust Solvothermal Synthesis of Nanocrystalline CuInS2 Thin Films. Nanomaterials. 2018; 8(6):405.Chicago/Turabian Style
Frank, Anna; Grunwald, Jan; Breitbach, Benjamin; Scheu, Christina. 2018. "Facile and Robust Solvothermal Synthesis of Nanocrystalline CuInS2 Thin Films." Nanomaterials 8, no. 6: 405.
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