Electrochromic properties of Nb2O5 and Nb2O5:X sol-gel coatings (X=Sn, Zr, Li, Ti, Mo)

Mike Schmitt; Michel Andre Aegerter

doi:10.1117/12.366094

8 October 1999 Electrochromic properties of Nb2O5 and Nb2O5:X sol-gel coatings (X=Sn, Zr, Li, Ti, Mo)

Mike Schmitt, Michel Andre Aegerter

Proceedings Volume 3788, Switchable Materials and Flat Panel Displays; (1999) https://doi.org/10.1117/12.366094
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

Abstract

Two-layer coatings of Nb₂O₅ and niobia doped with tin (up to 15 at%), zirconium (up to 15 at%), lithium (up to 15 at%), titanium (up to 30 at%) and molybdenum (up to 30 at%) have been prepared by the sol-gel process and deposited by dip-coating on conductive ITO coated glass (R_{(open square}) equals 10 (Omega) _{(open square})). They have been sintered in air between 450 degree(s)C and 600 degree(s)C. Their structure, morphology, electrochemical and optical properties (measured in a liquid electrolyte (1 M LiClO₄ in PC)) are reported. All systems exhibit electrochromic properties. Those are essentially determined by the structure and the morphology of the layers which can be changed in a controlled manner by the amount of doping and the sintering temperature. After Li⁺-insertion all amorphous coatings present a brown color, a blue one when the structure is hexagonal and a gray one when the structure is orthorhombic (pure, titanium or molybdenum doped niobia) or monoclinic (Li-doped niobia). Samples with two different structures color either blue or gray.

Citation Download Citation

Mike Schmitt and Michel Andre Aegerter "Electrochromic properties of Nb2O5 and Nb2O5:X sol-gel coatings (X=Sn, Zr, Li, Ti, Mo)", Proc. SPIE 3788, Switchable Materials and Flat Panel Displays, (8 October 1999); https://doi.org/10.1117/12.366094

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