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Polaron Delocalization in Donor–Acceptor Polymers and its Impact on Organic Electrochemical Transistor Performance

Journal Article · · Angewandte Chemie (International Edition)
 [1];  [2];  [3];  [4];  [2];  [2];  [5];  [6];  [7];  [7];  [1];  [8];  [2];  [9]
  1. University of Oxford Department of Chemistry Oxford OX1 3TA UK
  2. King Abdullah University of Science and Technology (KAUST) Biological and Environmental Science and Engineering Division Thuwal 23955-6900 Saudi Arabia
  3. University of Kentucky Department of Chemistry Lexington KY 40506-0055 USA
  4. Northwestern University Department of Biomedical Engineering Chicago IL 60208 USA
  5. King Abdullah University of Science and Technology (KAUST) Physical Science and Engineering Division Thuwal 23955-6900 Saudi Arabia
  6. Stanford University TomKatCenter for Sustainable Energy Stanford CA 94305-4125 USA
  7. Imperial College London Department of Chemistry and Center for Plastic Electronics London W12 0BZ UK
  8. Northwestern University Department of Biomedical Engineering Chicago IL 60208 USA, Northwestern University Simpson Querrey Institute Chicago IL 60611 USA
  9. University of Oxford Department of Chemistry Oxford OX1 3TA UK, King Abdullah University of Science and Technology (KAUST) Physical Science and Engineering Division Thuwal 23955-6900 Saudi Arabia
Abstract

Donor–acceptor (D‐A) polymers are promising materials for organic electrochemical transistors (OECTs), as they minimize detrimental faradaic side‐reactions during OECT operation, yet their steady‐state OECT performance still lags far behind their all‐donor counterparts. We report three D‐A polymers based on the diketopyrrolopyrrole unit that afford OECT performances similar to those of all‐donor polymers, hence representing a significant improvement to the previously developed D‐A copolymers. In addition to improved OECT performance, DFT simulations of the polymers and their respective hole polarons also reveal a positive correlation between hole polaron delocalization and steady‐state OECT performance, providing new insights into the design of OECT materials. Importantly, we demonstrate how polaron delocalization can be tuned directly at the molecular level by selection of the building blocks comprising the polymers’ conjugated backbone, thus paving the way for the development of even higher performing OECT polymers.

Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1780240
Alternate ID(s):
OSTI ID: 1815024
Journal Information:
Angewandte Chemie (International Edition), Journal Name: Angewandte Chemie (International Edition) Journal Issue: 14 Vol. 60; ISSN 1433-7851
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

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