Accession Number:

ADP012635

Title:

Thin Films of Antimony-Tin Oxide as Counter-Electrodes for Proton Working Electrochromic Devices

Descriptive Note:

Symposium proceedings

Corporate Author:

PICARDIE JULES VERNE UNIV AMIENS (FRANCE)

Report Date:

2002-01-01

Pagination or Media Count:

6.0

Abstract:

We report here on thin films proton-working electrochromic devices based on the well-known tungsten oxide as the coloring electrode, and Antimony Tin Oxide ATO as the ion-storage counter-electrode. We show that films deposited by Pulsed Laser Deposition PLD technique have an apparent Sb solubility up to 70 at , and exhibit unusual electrochromic properties. Through potentiostatic tests well demonstrate that depending on the composition which influences film morphology, the Sn-Sb-O films could either present a faradic or a capacitive-like behavior, associated to a color or a neutral switching over a wide range of potentials, respectively. The structural properties of ATO films are characterized by X-ray diffraction and transmission electron microscopy TEM. Electrochromic behavior is studied by means of cyclic voltamperometry coupled with ex situ optical transmittance measurements in the visible range. The maximum proton-storage capacity is observed for ATO films containing 40 - 50 at Sb, while being quasi-neutral when switching over a wide range of potentials. These compositions are finally retained for the assembly of our WO3proton-electrolyteATO devices, whose performances are reported.

Subject Categories:

  • Solid State Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE