Effects of hydrothermal annealing on characteristics of CuInS 2 thin films by SILAR method

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Abstract

CuInS 2 thin films have been deposited by successive ionic layer absorption and reaction (SILAR) method, then annealed in a Na 2 S solution (denoted as hydrothermal annealing) at 200°C for different time. The effect of hydrothermal annealing on the properties of the films was studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM) and optical absorption spectroscopy. The XRD, TEM and SEM results indicate that well-crystallized CuInS 2 films could be obtained after annealing in 0.1 mol/L Na 2 S solution for 1.5 h. The annealed CuInS 2 films were slightly S-rich and the direct band gap varied from 1.32 to 1.58 eV as the annealing time increased from 0.5 h to 2 h. © 2012 Elsevier B.V. All rights reserved.

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Shi, Y., Xue, F., Li, C., Zhao, Q., Qu, Z., & Li, X. (2012). Effects of hydrothermal annealing on characteristics of CuInS 2 thin films by SILAR method. Applied Surface Science, 258(19), 7465–7469. https://doi.org/10.1016/j.apsusc.2012.04.062

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