Red to blue high electrochromic contrast and rapid switching poly(3,4-ethylenedioxypyrrole)-Au/Ag nanocomposite devices for smart windows

Kharkwal, A and Melepurath, D and Joshi, A G and Srivastava, A K (2011) Red to blue high electrochromic contrast and rapid switching poly(3,4-ethylenedioxypyrrole)-Au/Ag nanocomposite devices for smart windows. ChemPhysChem, 12 (6). pp. 1176-1188. ISSN 1439-4235

Full text not available from this repository. (Request a copy)

Abstract

Poly(3,4-ethylenedioxypyrrole) (PEDOP)-Ag and PEDOP-Au nanocomposite films have been synthesized for the first time by electropolymerization of the conducting-polymer precursor in a waterproof ionic liquid, 1-butyl-1- methylpyrrolidinium bis(trifluoromethylsulfonyl)imide, followed by Ag/Au nanoparticle incorporation. That the Ag/Au nanoparticles are not adventitious entities in the film is confirmed by a) X-ray photoelectron spectroscopy, which provides evidence of Ag/Au-PEDOP interactions through chemical shifts of the Ag/Au core levels and new signals due to Ag-N(H) and Au-N(H) components, and b) electron microscopy, which reveals Au nanoparticles with a face-centered-cubic crystalline structure associated with the amorphous polymer. Spectroelectrochemistry of electrochromic devices based on PEDOP-Au show a large coloring efficiency (ηmax=270 cm2â C-1, Î=458 nm) in the visible region, for an orange/red to blue reversible transition, followed by a second, remarkably high ηmax of 490 cm2âC-1 (Î=1000 nm) in the near-infrared region as compared to the much lower values achieved for the neat PEDOP analogue. Electrochemical impedance spectroscopy studies reveal that the metal nanoparticles lower charge-transfer resistance and facilitate ion intercalation-deintercalation, which manifests in enhanced performance characteristics. In addition, significantly faster color-bleach kinetics (five times of that of neat PEDOP!) and a larger electrochemical ion insertion capacity unambiguously demonstrate the potential such conducting-polymer nanocomposites have for smart window applications. A noble cause: The role of gold and silver nanoparticles in endowing poly(3,4-ethylenedioxypyrrole) (PEDOP) with a significantly high electrochromic coloring efficiency over a wide spectral range is demonstrated. Fast color switching rates and modification of the color contrast of the polymer through direct PEDOP-metal nanoparticle interactions are achieved (see picture; PVP=polyvinylpyrrolidone).

[error in script]
IITH Creators:
IITH CreatorsORCiD
Melepurath, DUNSPECIFIED
Item Type: Article
Uncontrolled Keywords: conducting polymers; electrochemistry; electrooptical properties; nanoparticles; thin films
Subjects: Chemistry > Techniques, procedures, apparatus, equipment, materials
?? sub5.8 ??
Divisions: Department of Chemistry
Depositing User: Team Library
Date Deposited: 03 Nov 2014 08:27
Last Modified: 16 Apr 2015 06:50
URI: http://raiith.iith.ac.in/id/eprint/617
Publisher URL: http://dx.doi.org/10.1002/cphc.201000973
OA policy: http://www.sherpa.ac.uk/romeo/issn/1439-4235/
Related URLs:

Actions (login required)

View Item View Item
Statistics for RAIITH ePrint 617 Statistics for this ePrint Item