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Thickness dependent structural ordering, degradation and metastability in polysilane thin films: A photoluminescence study on representative σ-conjugated polymers

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dc.title Thickness dependent structural ordering, degradation and metastability in polysilane thin films: A photoluminescence study on representative σ-conjugated polymers en
dc.contributor.author Urbánek, Pavel
dc.contributor.author Kuřitka, Ivo
dc.relation.ispartof Journal of Luminescence
dc.identifier.issn 0022-2313 Scopus Sources, Sherpa/RoMEO, JCR
dc.date.issued 2015
utb.relation.volume 168
dc.citation.spage 261
dc.citation.epage 268
dc.type article
dc.language.iso en
dc.publisher Elsevier
dc.identifier.doi 10.1016/j.jlumin.2015.08.022
dc.relation.uri https://www.sciencedirect.com/science/article/pii/S0022231315004615
dc.subject Dangling bond en
dc.subject Mesoscale en
dc.subject Metastability en
dc.subject Photoluminescence en
dc.subject Polysilanes en
dc.subject Selfhealing en
dc.description.abstract We present a fundamental experimental study based on the fluorescence investigation of thin σ-conjugated polymer films, where the dependence of optoelectrical properties and UV degradation on film thickness ranging from nano- to microscale was studied. Such extensive and detailed study was performed for the first time and observed spectral shifts in emission and excitation spectra and UV degradation retardation point towards the conclusions that there exists a threshold thickness where the material degradation behavior, electron delocalization and structure suddenly change. The development of well aligned polymeric chain structure between the nano- and micrometer thickness (on the mesoscale) was shown responsible for the manifested phenomena. The material thicker than critical 500 nm has extremely small Stokes' shift, maximum extended σ-delocalization along the silicon polymer backbone and exhibits remarkable UV degradation slowdown and self-recovery ability. On the contrary, the electronic properties of thin films below 80 nm resemble those of random coils in solutions. The films of moderate thickness show relatively steep transition between these two modes of structural ordering and resulting properties. Altogether, we consider this complex phenomenon as a consequence of the mesoscale effect, which is an only recently introduced concept in polymer thin films. © 2015 Elsevier B.V. All rights reserved. en
utb.faculty University Institute
dc.identifier.uri http://hdl.handle.net/10563/1005640
utb.identifier.rivid RIV/70883521:28610/15:43873187!RIV16-MSM-28610___
utb.identifier.obdid 43873618
utb.identifier.scopus 2-s2.0-84940932218
utb.identifier.wok 000363353300040
utb.identifier.coden JLUMA
utb.source j-wok
dc.date.accessioned 2015-10-02T15:10:13Z
dc.date.available 2015-10-02T15:10:13Z
dc.description.sponsorship Operational Programme 'Research and Development for Innovations'; European Regional Development Fund (ERDF); National Budget of the Czech Republic within the project 'Centre of Polymer Systems' [CZ.1.05/2.1.00/03.0111]; Operational Programme 'Education for Competitiveness'; European Social Fund (ESF); National Budget of the Czech Republic, within the project 'Advanced Theoretical and Experimental Studies of Polymer Systems' [CZ.1.07/23.00/20.0104]; Ministry of Education, Youth and Sports of the Czech Republic - Program NPU I [LO1504]
dc.rights Attribution 4.0 International
dc.rights.uri http://creativecommons.org/licenses/by/4.0/
dc.rights.access openAccess
utb.ou Centre of Polymer Systems
utb.contributor.internalauthor Urbánek, Pavel
utb.contributor.internalauthor Kuřitka, Ivo
utb.fulltext.affiliation Pavel Urbánek 1, Ivo Kuřitka *1 1 Centre of Polymer Systems, University Institute, Tomas Bata University in Zlin, Tr. Tomase Bati 5678, 760 01 Zlín, Czech Republic * Corresponding author: kuritka@cps.utb.cz
utb.fulltext.dates Received date: 16 September 2014 Revised date: 8 July 2015 Accepted date: 7 August 2015
utb.fulltext.faculty University Institute
utb.fulltext.faculty University Institute
utb.fulltext.ou Centre of Polymer Systems
utb.fulltext.ou Centre of Polymer Systems
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Attribution 4.0 International Except where otherwise noted, this item's license is described as Attribution 4.0 International