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|Title:||Enhanced electrochromism with rapid growth layer-by-layer assembly of polyelectrolyte complexes||Authors:||Darmawan, Peter
Lee, Pooi See
Ng, Wee Siang
|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.||URI:||https://hdl.handle.net/10356/103966
|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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