Electrochemical and structural properties of SnO2 and Sb:SnO2 transparent electrodes with mixed electronically conductive and ion-storage characteristics

Boris Orel; U. Lavrencic Stangar; F. Svegl

doi:10.1117/12.185424

9 September 1994 Electrochemical and structural properties of SnO₂ and Sb:SnO₂ transparent electrodes with mixed electronically conductive and ion-storage characteristics

Boris Orel, U. Lavrencic Stangar, F. Svegl

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Proceedings Volume 2255, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XIII; (1994) https://doi.org/10.1117/12.185424
Event: Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XIII, 1994, Freiburg, Germany

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.

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Boris Orel, U. Lavrencic Stangar, and F. Svegl "Electrochemical and structural properties of SnO₂ and Sb:SnO₂ transparent electrodes with mixed electronically conductive and ion-storage characteristics", Proc. SPIE 2255, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XIII, (9 September 1994); https://doi.org/10.1117/12.185424

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Electrodes

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