Interdiffusion and Spinodal Decomposition in Electrically Conducting Polymer Blends

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en Takala, Antti Takala, Päivi Seppälä, Jukka Levon, Kalle 2017-05-03T12:24:20Z 2017-05-03T12:24:20Z 2015
dc.identifier.citation Takala , A , Takala , P , Seppälä , J & Levon , K 2015 , ' Interdiffusion and Spinodal Decomposition in Electrically Conducting Polymer Blends ' POLYMERS , vol 7 , no. 8 , pp. 1410-1426 . DOI: 10.3390/polym7081410 en
dc.identifier.issn 2073-4360
dc.identifier.other PURE UUID: 44cbcb00-8b09-4f4d-88a0-c59b731e15dc
dc.identifier.other PURE ITEMURL:
dc.identifier.other PURE FILEURL:
dc.description.abstract The impact of phase morphology in electrically conducting polymer composites has become essential for the efficiency of the various functional applications, in which the continuity of the electroactive paths in multicomponent systems is essential. For instance in bulk heterojunction organic solar cells, where the light-induced electron transfer through photon absorption creating excitons (electron-hole pairs), the control of diffusion of the spatially localized excitons and their dissociation at the interface and the effective collection of holes and electrons, all depend on the surface area, domain sizes, and connectivity in these organic semiconductor blends. We have used a model semiconductor polymer blend with defined miscibility to investigate the phase separation kinetics and the formation of connected pathways. Temperature jump experiments were applied from a miscible region of semiconducting poly(alkylthiophene) (PAT) blends with ethylenevinylacetate-elastomers (EVA) and the kinetics at the early stages of phase separation were evaluated in order to establish bicontinuous phase morphology via spinodal decomposition. The diffusion in the blend was followed by two methods: first during a miscible phase separating into two phases: from the measurement of the spinodal decomposition. Secondly the diffusion was measured by monitoring the interdiffusion of PAT film into the EVA film at elected temperatures and eventually compared the temperature dependent diffusion characteristics. With this first quantitative evaluation of the spinodal decomposition as well as the interdiffusion in conducting polymer blends, we show that a systematic control of the phase separation kinetics in a polymer blend with one of the components being electrically conducting polymer can be used to optimize the morphology. en
dc.format.extent 17
dc.format.extent 1410-1426
dc.format.mimetype application/pdf
dc.language.iso en en
dc.relation.ispartofseries POLYMERS en
dc.relation.ispartofseries Volume 7, issue 8 en
dc.rights openAccess en
dc.subject.other 215 Chemical engineering en
dc.subject.other 220 Industrial biotechnology en
dc.subject.other 216 Materials engineering en
dc.title Interdiffusion and Spinodal Decomposition in Electrically Conducting Polymer Blends en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department Department of Biotechnology and Chemical Technology
dc.contributor.department Department of Chemical and Metallurgical Engineering en
dc.subject.keyword electrically conducting polymers
dc.subject.keyword blends
dc.subject.keyword multiple percolation
dc.subject.keyword phase separation
dc.subject.keyword spinodal
dc.subject.keyword interdiffusion
dc.subject.keyword semiconducting polymers
dc.subject.keyword 215 Chemical engineering
dc.subject.keyword 220 Industrial biotechnology
dc.subject.keyword 216 Materials engineering
dc.identifier.urn URN:NBN:fi:aalto-201705033790
dc.identifier.doi 10.3390/polym7081410
dc.type.version publishedVersion

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