Linking microstructure to transport at several length scales in conjugated polymers (Conference Presentation)

Alberto Salleo

doi:10.1117/12.2632892

3 October 2022 Linking microstructure to transport at several length scales in conjugated polymers (Conference Presentation)

Alberto Salleo

Author Affiliations +

Proceedings Volume PC12211, Organic and Hybrid Field-Effect Transistors XXI; PC122110J (2022) https://doi.org/10.1117/12.2632892
Event: SPIE Organic Photonics + Electronics, 2022, San Diego, California, United States

Abstract

Carrier mobility in conjugated polymers continues to increase with recent reports of field-effect mobilities exceeding 10 cm2/V.s. Charge transport is intrinsically dependent on processes occurring across multiple lengthscales. In order to access order parameters at the molecular scale we use charge modulation spectroscopy combined with theory.1 This technique allows us to further differentiate field-induced and doping-induced charges and study how their delocalization depends on local structure and disorder. Furthermore, we study the mesoscale organization of polymers using new techniques in the transmission electron microscope. By combining 4D STEM2 and HRTEM we are able to study the microstructure across a range of length-scales in real space and reciprocal space. These techniques are used on homopolymers and donor-acceptor copolymers and allow to extract information about the microstructure that is typically not visible by inspection. Such multiscale studies of microstructure are instrumental in guiding our understanding of charge transport in conjugated polymers.

Conference Presentation

Citation Download Citation

Alberto Salleo "Linking microstructure to transport at several length scales in conjugated polymers (Conference Presentation)", Proc. SPIE PC12211, Organic and Hybrid Field-Effect Transistors XXI, PC122110J (3 October 2022); https://doi.org/10.1117/12.2632892

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