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Effects of film structure on electrochromic properties of the multilayer films containing polyoxometalates

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Abstract.
Multilayer films of tungstophosphate anion (P2W18) and poly(allylamine hydrochloride) (PAH) were fabricated
on quartz and ITO substrates by layer-by-layer self-assembly method. These films were characterized
by UV–vis spectroscopy, cyclic voltammetry (CV), chronoamperometric (CA), chronocoulometry (CC)
and atomic force microscopy (AFM). The effects of film structure on multilayer electrochromic properties
were investigated. The electrochromic responses of the composite films were related to the surface coverage
of anion and multilayer thickness. It was found that higher concentration of polycation and anion, or
adding salt to the polycation solution used for multilayer film preparation led to thicker and denser film
structure which improved optical contrast and coloration efficiency whereas prolonged response time.

Keywords: Electrochromic properties, Layer-by-layer assembly, Polyoxometalates, Film structure

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Informasi Detail

Judul Seri

Journal of Colloid and Interface Science

No. Panggil

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Penerbit

London : Elsevier Inc.., 2009

Deskripsi Fisik

Journal of Colloid and Interface Science 330 (2009) 408–414

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

KIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

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