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Title: Enhanced electrochromism with rapid growth layer-by-layer assembly of polyelectrolyte complexes
Authors: Darmawan, Peter
Lee, Pooi See
Cui, Mengqi
Ng, Wee Siang
Wang, Xu
Keywords: DRNTU::Engineering::Materials::Functional materials
Issue Date: 2014
Source: Cui, M., Ng, W. S., Wang, X., Darmawan, P., & Lee, P. S. (2014). Enhanced electrochromism with rapid growth layer-by-layer assembly of polyelectrolyte complexes. Advanced functional materials, 25(3), 401–408.
Series/Report no.: Advanced functional materials
Abstract: In this work, a facile method to deposit fast growing electrochromic multilayer films with enhanced electrochemical properties using layer-by-layer (LbL) self-assembly of complex polyelectrolyte is demonstrated. Two linear polymers, poly(acrylic acid) (PAA) and polyethylenimine (PEI), are used to formulate stable complexes under specific pH to prepare polyaniline (PANI)/PAA-PEI multilayer films via LbL deposition. By introducing polymeric complexes as building blocks, [PANI/PAA-PEI]n films grow much faster compared with [PANI/PAA]n films, which are deposited under the same condition. Unlike the compact [PANI/PAA]n films, [PANI/PAA-PEI]n films exhibit porous structure that is beneficial to the electrochemical process and leads to improved electrochromic properties. An enhanced optical modulation of 30% is achieved with [PANI/PAA-PEI]30 films at 630 nm compared with the lower optical modulation of 11% measured from [PANI/PAA]30 films. The switching time of [PANI/PAA-PEI]30 films is only half of that of [PANI/PAA]30 films, which indicates a faster redox process. Utilizing polyelectrolyte complexes as building blocks is a promising approach to prepare fast growing LbL films for high performance electrochemical device applications.
ISSN: 1616-301X
DOI: 10.1002/adfm.201402100
Rights: © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:MSE Journal Articles

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