Direct Observations of the Structural Properties of Semiconducting Polymer: Fullerene Blends under Tensile Stretching

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ID: 110227
2020
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Abstract
We describe the impact of tensile strains on the structural properties of thin films composed of PffBT4T-2OD π-conjugated polymer and PC71BM fullerenes coated on a stretchable substrate, based on a novel approach using in situ studies of flexible organic thin films. In situ grazing incidence X-ray diffraction (GIXD) measurements were carried out to probe the ordering of polymers and to measure the strain of the polymer chains under uniaxial tensile tests. A maximum 10% tensile stretching was applied (i.e., beyond the relaxation threshold). Interestingly we found different behaviors upon stretching the polymer: fullerene blends with the modified polymer; fullerene blends with the 1,8-Diiodooctane (DIO) additive. Overall, the strain in the system was almost twice as low in the presence of additive. The inclusion of additive was found to help in stabilizing the system and, in particular, the π–π packing of the donor polymer chains.
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Authors Mouaad Yassine Aliouat;Dmitriy Ksenzov;Stephanie Escoubas;Jörg Ackermann;Dominique Thiaudière;Cristian Mocuta;Mohamed Cherif Benoudia;David Duche;Olivier Thomas;Souren Grigorian;Aliouat, Mouaad Yassine;Ksenzov, Dmitriy;Escoubas, Stephanie;Ackermann, Jörg;Thiaudière, Dominique;Mocuta, Cristian;Benoudia, Mohamed Cherif;Duche, David;Thomas, Olivier;Grigorian, Souren;
Journal materials
Year 2020
DOI 10.3390/ma13143092
URL
https://www.mdpi.com/1996-1944/13/14/3092
Keywords
structure additive strain conjugated polymer and blends in situ gixd

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