Organic semiconductors and electrochemical transistors promise to enable new generations of low-cost, mechanically flexible, and wearable electronic devices. With this novel chemical doping process discovered by the Alexandra Paterson team and collaborators, this promise is one step closer to fulfillment.
A publication titled, “New Chemical Dopant and Counterion Mechanism for Organic Electrochemical Transistors and Organic Mixed Ionic–Electronic Conductors” appeared in Advanced Science, and several members of CAER’s Carbon Electronics researchers worked on this piece. Authors include Vianna N. Le, Joel H. Bombile, Gehan S. Rupasinghe, Kyle N. Baustert, Ruipeng Li, Iuliana P. Maria, Maryam Shahi, Paula Alarcon Espejo, Iain McCulloch, Kenneth R. Graham, Chad Risko, and Alexandra F. Paterson.
Organic mixed ionic–electronic conductors (OMIECs) have varied performance requirements across a diverse application space. Chemically doping the OMIEC can be a simple, low-cost approach for adapting performance metrics. However, complex challenges, such as identifying new dopant materials and elucidating design rules, inhibit its realization. Here, these challenges are approached by introducing a new n-dopant, tetrabutylammonium hydroxide (TBA-OH), and identifying a new design consideration underpinning its success. TBA-OH behaves as both a chemical n-dopant and morphology additive in donor acceptor co-polymer naphthodithiophene diimide-based polymer, which serves as an electron transporting material in organic electrochemical transistors (OECTs).
Read the full article: https://onlinelibrary.wiley.com/doi/10.1002/advs.202207694