Rational design of new conjugated polymers with main chain chirality for efficient optoelectronic devices: carbo[6]helicene and indacenodithiophene copolymers as model compounds
Author(s)
Type
Journal Article
Abstract
The unique properties of conjugated polymers (CPs) in various optoelectronic applications are mainly attributed to their different self-assembly processes and superstructures. Various methods are utilized to tune and control CP structure and properties with less attention paid to the use of chirality. CPs with main chain chirality are rare and their microscopic and macroscopic properties are still unknown. In this work, the first experimental results are provided along these lines by synthesizing a series of racemic and enantiopure CPs containing statistical and alternating carbo[6]helicene and indacenodithiophene moieties and evaluating their microscopic (optical, energy levels) and macroscopic properties (hole mobilities, photovoltaic performance). It is demonstrated that a small statistical insertion of either the racemic or enantiopure helicene into the polymer backbone finely tunes the microscopic and macroscopic properties as a function of the statistical content. The microscopic properties of the enantiopure versus the racemic polymers with the same helicene loading remain similar. On the contrary, the macroscopic properties, and more interestingly those between the two enantiomeric forms, are altered as a function of the statistical content. Once incorporated into a solar cell device, these chiral CPs display better performance in their enantiopure versus racemic forms.
Date Issued
2024-06
Date Acceptance
2024-02-01
Citation
Advanced Materials, 2024, 36 (25)
ISSN
0935-9648
Publisher
Wiley
Journal / Book Title
Advanced Materials
Volume
36
Issue
25
Copyright Statement
© 2024 The Authors. Advanced Materials published by Wiley-VCH GmbH
This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
License URL
Identifier
https://www.ncbi.nlm.nih.gov/pubmed/38406997
Subjects
chirality
helicene
organic solar cells
self‐assembly
π‐conjugated polymers
Publication Status
Published
Coverage Spatial
Germany
Article Number
2314337
Date Publish Online
2024-02-26