The electrochromic behavior of indium tin oxide in propylene carbonate solutions
- Philips Research, Eindhoven (Netherlands)
The authors report on a study of transparent conducting tin-doped indium oxide (ITO) electrodes in propylene carbonate solutions containing lithium ions. The system was studied using electrochemical methods in combination with in situ techniques: ultraviolet-visible spectroscopy, X-ray diffraction, and quartz crystal microbalance. The results show that the cathodic process at E {approx_gt} 1.0 V vs. Li/Li{sup +} mainly involves the reduction of the electrolyte solution, leading to the formation of a thin, lithium-rich surface film. At potentials {approx_lt}1.0 V vs. Li/Li{sup +}, degradation of ITO and the formation of metallic indium take place. No evidence was obtained that lithium-ion intercalation into ITO, which has been suggested by several workers, occurs to a significant extent. The authors conclude that ITO probably cannot be used as a combined ion-storage layer and transparent conductor for all-solid-state and laminated electrochromic switching devices in view of long-term stability.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 653372
- Journal Information:
- Journal of the Electrochemical Society, Vol. 145, Issue 7; Other Information: PBD: Jul 1998
- Country of Publication:
- United States
- Language:
- English
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