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Electrochemical and structural properties of SnO2 and Sb:SnO2 transparent electrodes with mixed electronically conductive and ion-storage characteristics
Author(s): Boris Orel; U. Lavrencic Stangar; F. Svegl
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Paper Abstract

Sb:SnO2 films (body resistance 1.2 X 10-2 (Omega) cm) which were deposited by dip-coating technique via the sol-gel route using SnCl4(DOT)5H2O and SbCl3 precursors have been found to exhibit mixed electronic conductivity and ion-storage characteristics. The Li+ and H+ ion (de)insertion properties of the films were determined from the cyclic voltammetric (CV) measurements from solvents containing LiClO4 (0.1 M) in acetonitrile or water, LiOH (0.1 M) and HClO4 (0.001 - 0.01 M). The particle grain size of Sb:SnO2 and SnO2 films has been determined from the XRD measurements and was found to be larger for undoped (55 - 71 angstroms) than for the Sb doped films (46 - 58 angstroms). The Sb:SnO2 films exhibit effective charges per film thickness (Q(deint)/d) in the range 0.01 - 0.02 mC/cm2nm and outrange by about 3 times the Q/d values obtained for undoped films. Combining the CV results with the in-situ spectroelectrochemical measurements it was concluded that the intercalation process of Li+ ions in Sb:SnO2 films is governed by the layer charging of the inner grain surfaces which overwhelms the underlaying redox changes involving the Sn4+ ions. The performance of the transmissive electrochromic device made of WO3/H3PO4-polyvinyl alcohol (PVA)/Sb:SnO2 was tested and the results presented and discussed.

Paper Details

Date Published: 9 September 1994
PDF: 12 pages
Proc. SPIE 2255, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XIII, (9 September 1994); doi: 10.1117/12.185424
Show Author Affiliations
Boris Orel, National Institute of Chemistry (Slovenia)
U. Lavrencic Stangar, National Institute of Chemistry (Slovenia)
F. Svegl, National Institute of Chemistry (Slovenia)

Published in SPIE Proceedings Vol. 2255:
Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XIII
Volker Wittwer; Claes G. Granqvist; Carl M. Lampert, Editor(s)

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