Decreased electrochromism in Li-intercalated Ti oxide films containing La, Ce, and Pr

Journal Article · Sun Jun 01 04:00:00 EDT 1997 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.365404· OSTI ID:530023

Kullman, L; Azens, A; Granqvist, C G ^[1]

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1. Department of Materials Science, Uppsala University, Post Office Box 534, S-751 21 Uppsala (Sweden)

Films of Ti{endash}La oxide, Ti{endash}Ce oxide, and Ti{endash}Pr oxide were produced by reactive dc magnetron sputtering. Their composition was determined by Rutherford backscattering spectrometry. X-ray diffractometry and infrared absorption spectroscopy indicated that the microstructure was heavily disordered and in most cases Ti-oxidelike. Electrochemical Li intercalation/deintercalation was studied by cyclic voltammetry, and ensuing optical data were recorded by spectrophotometry. Ce addition diminished the electrochromism, and films with Ce/Ti atom ratios exceeding 0.3 were almost fully transparent irrespective of their lithiation, pointing at the potential applications of such films as counter electrodes in transparent electrochromic devices. The optical and electrochemical data were discussed in terms of a model based on electron insertion/extraction in 4f states located in the gap between the valence and conduction bands of CeO{sub 2}. {copyright} {ital 1997 American Institute of Physics.}

• OSTI ID: 530023
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 12 Vol. 81; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CERIUM COMPOUNDS
CERIUM OXIDES
CHEMICAL COMPOSITION
ELECTROCHEMISTRY
ELECTROCHROMISM
INFRARED SPECTRA
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
LITHIUM COMPOUNDS
MICROSTRUCTURE
PRASEODYMIUM COMPOUNDS
PRASEODYMIUM OXIDES
SPUTTERING
THIN FILMS
TITANIUM COMPOUNDS
TITANIUM OXIDES
X-RAY DIFFRACTION