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Title: Sol-gel deposition of EC-WO3 films using a precursor with enhanced stability
Authors: Ramachandran, R
Agnihotry, S A
Issue Date: Apr-1999
Publisher: NISCAIR-CSIR, India
Abstract: Deposition of WO3 films using precursors based on non-alkoxide materials follow two different routes. One of them involves preparation of polytungstic acid 'sol' by ion-exchange route. Although the reaction here is carried out at room temperature, the sol thus obtained is unstable and transforms into a gel within a short time. The other route follows preparation of peroxotungstic acid (PTA) starting with tungsten metal and reacting it with excess hydrogen peroxide under controlled conditions of temperature, resulting in a precursor with enhanced stability. PTA was characterized by DSC, XRD, FTIR and UV-visible spectrophotometry. Films deposited by spin coating technique when tested for electrochromism were found suitable for such applications.
Page(s): 353-355
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Appears in Collections:IJPAP Vol.37(04) [April 1999]

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