Coloration behavior of hybrid electrochromic films

Matthew Denesuk, John P. Cronin, S. R. Kennedy, K. J. Law, G. F. Nielson, Donald R. Uhlmann

Research output: Chapter in Book/Report/Conference proceedingConference contribution

19 Scopus citations

Abstract

A novel synthesis of a sol-gel precursor for WO3 thin films is presented. Through addition of oxalic acid dihydrate to the precursor solution, films with different microstructures may be obtained; and these microstructures are characterized using TEM, FESEM, and SAXS. Without the additive, the films are relatively homogeneous and amorphous; with the additive, the films are multiphase, containing amorphous and crystalline regions. In addition, the latter films contain numerous small regions of apparently much higher electron density, which likely correspond to a dispersed W-rich phase. Optoelectrochemical analysis of the films under galvanostatic conditions demonstrates that the homogeneous, amorphous films display a pronounced cycling effect in both the response of the electrode potential and the optical efficiency. In contrast, the multiphase films show no significant cycling effect.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
PublisherSociety of Photo-Optical Instrumentation Engineers
Pages52-61
Number of pages10
ISBN (Print)0819415642
StatePublished - Dec 1 1994
EventOptical Materials Technology for Energy Efficiency and Solar Energy Conversion XIII - Freiburg, Ger
Duration: Apr 18 1994Apr 22 1994

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume2255
ISSN (Print)0277-786X

Other

OtherOptical Materials Technology for Energy Efficiency and Solar Energy Conversion XIII
CityFreiburg, Ger
Period4/18/944/22/94

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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