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Erschienen in: Journal of Polymer Research 3/2018

01.03.2018 | ORIGINAL PAPER

Control of morphology and performance of diketopyrrolopyrrole-based electrochromic polymers using solvent vapor annealing

verfasst von: Wei Teng Neo, Qun Ye, Zugui Shi, Soo-Jin Chua, Jianwei Xu

Erschienen in: Journal of Polymer Research | Ausgabe 3/2018

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Abstract

Post-deposition treatment including thermal and solvent annealing of polymer films in various organic electronics such as organic photovoltaics and organic thin film transistors plays a vital role in governing the film morphology and consequently their optical and electronic properties. However, such a post-treatment method has yet been used for electrochromics. This paper studied the influence of solvent vapor annealing of a diketopyrrolopyrrole-containing electrochromic conjugated polymer on its film morphology. Compared to an un-annealed film, the films exposed to acetone vapor and chloroform vapor are generally composed of polymer clusters with smaller domain sizes and more compact, aggregated structures. Subsequent evaluation of the electrochromic performances of the devices revealed the strong influence of the film morphologies on the optical contrasts, switching times and coloration efficiencies. In general, the electrochromic films treated with a poor solvent (acetone) exhibited faster switching speeds and improved coloration efficiencies. In contrast, treatment with a good solvent (chloroform) had destructive effects on the optical contrasts, switching speeds and coloration efficiency of the films. These findings showed that the electrochromic performance closely corresponded to changes in the film structure and morphology.

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Metadaten
Titel
Control of morphology and performance of diketopyrrolopyrrole-based electrochromic polymers using solvent vapor annealing
verfasst von
Wei Teng Neo
Qun Ye
Zugui Shi
Soo-Jin Chua
Jianwei Xu
Publikationsdatum
01.03.2018
Verlag
Springer Netherlands
Erschienen in
Journal of Polymer Research / Ausgabe 3/2018
Print ISSN: 1022-9760
Elektronische ISSN: 1572-8935
DOI
https://doi.org/10.1007/s10965-018-1458-x

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