An experimental and theoretical study of the structural ordering of the PTB7 polymer at a mesoscopic scale

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28110%2F19%3A63523466" target="_blank" >RIV/70883521:28110/19:63523466 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11320/19:10395783 RIV/70883521:28610/19:63523466
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0032386119301880" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0032386119301880</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.polymer.2019.02.048" target="_blank" >10.1016/j.polymer.2019.02.048</a>

Result language
angličtina
Original language name
An experimental and theoretical study of the structural ordering of the PTB7 polymer at a mesoscopic scale
Original language description
Our extensive study based on optoelectronic and electric measurements (which consisted of: UV–Vis absorption, photoluminescence, surface photovoltage measurement, charge extraction by linearly increasing voltage, and energy-resolved electrochemical impedance spectroscopy) revealed the fundamental role of the thickness of the formation of intra- and interchain interaction in poly({4,8-bis[(2-ethylhexyl)oxy]benzo[1,2-b:4,5-b′]dithiophene-2,6-diyl}{3-fluoro-2-[(2-ethylhexyl)carbonyl]thieno[3,4-b]thiophenediyl}) (PTB7) films. We have shown that the final optoelectronic and electronic properties of PTB7 films are governed by the structural ordering development of the transition from nano-to submicroscale. The ordering of polymer chains and competition between the formation of J- and H-aggregates results in a non-trivial dependence of luminescence, exciton diffusion length, transport band gap, and defect concentration. According to a theoretical analysis, the driving forces responsible for the observed phenomena are associated with the thickness threshold dependence of the thin film drying mode which can proceed with or without the polymer skin formation on the surface of forming film.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10404 - Polymer science

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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