Polaron Delocalization in Donor-Acceptor Polymers and its Impact on Organic Electrochemical Transistor Performance
Paulsen, Bryan D.
Hidalgo, Tania Cecilia
Giovannitti , Alexander
KAUST DepartmentBiological and Environmental Sciences and Engineering (BESE) Division
KAUST Biological and Environmental Science and Engineering SAUDI ARABIA
KAUST Solar Center (KSC)
Physical Science and Engineering (PSE) Division
Embargo End Date2021-12-01
Permanent link to this recordhttp://hdl.handle.net/10754/666276
MetadataShow full item record
AbstractDonor-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. Here, 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 revealed a positive correlation between hole polaron delocalization and steady-state OECT performance, providing new insights into the design of OECT materials. More 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.
CitationMoser, M., Savva, A., Thorley, K., Paulsen, B. D., Hidalgo, T. C., Ohayon, D., … McCulloch, I. (2020). Polaron Delocalization in Donor-Acceptor Polymers and its Impact on Organic Electrochemical Transistor Performance. Angewandte Chemie. doi:10.1002/ange.202014078