Influence of stoichiometry on the electrochromiccerium-titanium oxide compounds

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CeO<sub>2</sub>-TiO<sub>2</sub> finds use as passive counter-electrode in electrochromic devices. Thin films were produced by de-sputtering in a wide range of compositions. Influence of total pressure and oxygen partial pressure on the optical constants of TiO<sub>2</sub> was investigated. Slightly substoichiometric Ti0<sub>2</sub> films exhibit a red-shift of the bandgap. The Ti0<sub>2</sub> content in the compound essentially determines the degree of cathodical coloring upon Li<sup>+</sup> intercalation [1]. However, pure TiO<sub>2</sub> films with comparable visible transmittance in the clear state behave differently during electrochemical cycling depending on oxygen stoichiometry. Films that are deposited at higher total pressure are more oxygen rich and require initial ... continued below

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9 pages

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Kullman, L.; Richardson, T.; Rubin, M.; Slack, J. & von Rottkay, K. November 1, 1997.

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CeO<sub>2</sub>-TiO<sub>2</sub> finds use as passive counter-electrode in electrochromic devices. Thin films were produced by de-sputtering in a wide range of compositions. Influence of total pressure and oxygen partial pressure on the optical constants of TiO<sub>2</sub> was investigated. Slightly substoichiometric Ti0<sub>2</sub> films exhibit a red-shift of the bandgap. The Ti0<sub>2</sub> content in the compound essentially determines the degree of cathodical coloring upon Li<sup>+</sup> intercalation [1]. However, pure TiO<sub>2</sub> films with comparable visible transmittance in the clear state behave differently during electrochemical cycling depending on oxygen stoichiometry. Films that are deposited at higher total pressure are more oxygen rich and require initial formatting until current voltage cycles become stable. CeO<sub>2</sub>-Ti0<sub>2</sub> films of intermediate compositions have the relatively highest charge capacity. Comparison with atomic force microscopy indicates a correlation of small grain size with high charge capacity.

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9 pages

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  • 11th International Conference of Solid State Ionics, Honolulu, Hawaii, November 19, 1997

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  • Other: DE00006400
  • Report No.: LBNL--41550
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 6400
  • Archival Resource Key: ark:/67531/metadc689747

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  • November 1, 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • Aug. 30, 2016, 7:02 p.m.

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Kullman, L.; Richardson, T.; Rubin, M.; Slack, J. & von Rottkay, K. Influence of stoichiometry on the electrochromiccerium-titanium oxide compounds, article, November 1, 1997; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc689747/: accessed August 16, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.