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Thermal decomposition of thiourea complexes of Cu(I), Zn(II), and Sn(II) chlorides as precursors for the spray pyrolysis deposition of sulfide thin films

Madarász, János and Bombicz, Petra and Okuya, M. and Kaneko, S. (2001) Thermal decomposition of thiourea complexes of Cu(I), Zn(II), and Sn(II) chlorides as precursors for the spray pyrolysis deposition of sulfide thin films. SOLID STATE IONICS, 141. pp. 439-446. ISSN 0167-2738

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Abstract

Comparative study on thermal decomposition of four thiourea-metal complexes, solid precursors for spray pyrolysis deposition (SPD) methods, had been carried out by using thermoanalytical and X-ray diffraction (XRD) methods in combination. [Cu-2(tu)(6)]Cl-2. 2H(2)O (1), ZnCl2(tu)(2) (2), Sn2Cl4(tu)(5). 2H(2)O (3), and SnCl2(tu) (4) prepared from aqueous thiourea (tu) solutions, had been decomposed in a simultaneous thermogravimetric/differential thermoanalytical (TG/DTA) apparatus, while XRD phase analysis of solid residues obtained at various temperatures had been performed. In static air, a main degradation step between 200 degreesC and 300 degreesC led to the formation of Cu9S5 (digenite), ZnS (zinc blende), and SnSz (berndtite), respectively. Unfortunately, some chemical species with low volatility still remained in condensed phase, while above 400 degreesC, primary oxidation products of sulfides such as Cu2O(SO4) (dolerophanite), ZnO, and SnO2 also occurred. Nevertheless, intermittent spray pyrolysis depositions of Cu2SnS3 and Cu2ZnSnS4 films from some thiourea solutions with Cu(I), Zn(II), and Sn(II) onto glass substrates, with temperature ranging between 225 degreesC and 300 degreesC, were successful. (C) 2001 Elsevier Science B,V, All rights reserved.

Item Type: Article
Additional Information: ISI:000169421800064
Uncontrolled Keywords: Thin sulfide films; Spray pyrolysis deposition; Thermal decomposition; Simultaneous TGrDTA; XRD; Thiourea–metal complexes; Cu9S5; SnS2 ; ZnS; Cu2OŽSO4 .; Cu2SnS3; Cu2ZnSnS4
Subjects: Q Science / természettudomány > QD Chemistry / kémia
SWORD Depositor: MTMT SWORD
Depositing User: MTMT SWORD
Date Deposited: 25 Jun 2014 12:06
Last Modified: 25 Jun 2014 12:06
URI: http://real.mtak.hu/id/eprint/13351

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