Issue 38, 2022

Screening semiconducting polymers to discover design principles for tuning charge carrier mobility

Abstract

We employ a rapid method for computing the electronic structure and orbital localization characteristics for a sample of 36 different polymer backbone structures. This relatively large sample derived from recent literature is used to identify the features of the monomer sequence that lead to greater charge delocalization and, potentially, greater charge mobility. Two characteristics contributing in equal measure to large localization length are the reduced variation of the coupling between adjacent monomers due to conformational fluctuations and the presence of just two monomers in the structural repeating units. For such polymers a greater mismatch between the HOMO orbitals of the fragments and, surprisingly, a smaller coupling between them is shown to favour greater delocalization of the orbitals. The underlying physical reasons for such observations are discussed and explicit and constructive design rules are proposed.

Graphical abstract: Screening semiconducting polymers to discover design principles for tuning charge carrier mobility

Supplementary files

Article information

Article type
Paper
Submitted
16 iyn 2022
Accepted
01 sen 2022
First published
05 sen 2022
This article is Open Access
Creative Commons BY-NC license

J. Mater. Chem. C, 2022,10, 14319-14333

Screening semiconducting polymers to discover design principles for tuning charge carrier mobility

R. Manurung and A. Troisi, J. Mater. Chem. C, 2022, 10, 14319 DOI: 10.1039/D2TC02527B

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