Journal
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
Volume 21, Issue 10-11, Pages 2113-2116Publisher
ELSEVIER SCI LTD
DOI: 10.1016/S0955-2219(01)00183-2
Keywords
copper sulfides; films; X-ray methods
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Intermittent spray pyrolysis of 0.01-0.20 M aqueous solutions of CuCl (dissolved in the presence of 3-fold molar amount of thiourea) onto a heated alkali-free glass substrate in air already at 225-275 degreesC resulted in various thin films of CuS (covellite) and/or Cu(1.8)s (Cu9S5, digenite). A combination of low pyrolysis temperatures (225-250 degreesC) and low solution concentrations (0.01-0.02 M) has resulted in the formation of thin solid CuS films. At a pyrolysis temperature of 275 degreesC Cu1.8S films have been obtained. The higher concentration range (0.05-0.20 M) has been found favorable for simultaneous formation of Cu1.8S and CuS. In the two-phase layers the crystal growth of CuS has seemed to be limited, whilst the growth of Cu1.8S has been preferentially favored especially on its (0 0 15) lattice plane. (C) 2001 Elsevier Science Ltd. All rights reserved.
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