Side Chain Redistribution as a Strategy to Boost Organic Electrochemical Transistor Performance and Stability.

Maximilian Moser,Johannes Gladisch,Rajendar Sheelamanthula,Iain Mcculloch,Alberto Salleo,Alexander Giovannitti,Quentin Thiburce,Magnus Berggren,Igor Zozoulenko,Andrew Wadsworth,Nicola Gasparini,Tania Cecilia Hidalgo,Sarbani Ghosh,Eleni Stavrinidou,Jokubas Surgailis,Sahika Inal

doi:10.1002/adma.202002748

Abstract

A series of glycolated polythiophenes for use in organic electrochemical transistors (OECTs) is designed and synthesized, differing in the distribution of their ethylene glycol chains that are tethered to the conjugated backbone. While side chain redistribution does not have a significant impact on the optoelectronic properties of the polymers, this molecular engineering strategy strongly impacts the water uptake achieved in the polymers. By careful optimization of the water uptake in the polymer films, OECTs with unprecedented steady-state performances in terms of [μC* ] and current retentions up to 98% over 700 electrochemical switching cycles are developed.

Highlights

A series of glycolated polythiophenes for use in organic electrochemical absence of any insulating polyelectrolyte component improving their volumetric transistors (OECTs) is designed and synthesized, differing in the distribution capacitance, and v) their excellent comof their ethylene glycol chains that are tethered to the conjugated backbone
While side chain redistribution does not have a significant impact on the optoelectronic properties of the polymers, this molecular engineering strategy strongly impacts the water uptake achieved in the polymers
OECT steady-state performance is obviously of crucial importance, an significant but often overlooked parameter, is device stability, with few studies focusing on the operational stability of the materials during operation.[16,22,24,25]

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Maximilian; Hidalgo, Tania Cecilia; Surgailis, Jokubas; Gladisch, Johannes; Ghosh, Sarbani; Sheelamanthula, Rajendar; Thiburce, Quentin; Giovannitti, Alexander; Salleo, Alberto; Gasparini, Nicola; Wadsworth, Andrew; Zozoulenko, Igor; Berggren, Magnus; Stavrinidou, Eleni; Inal, Sahika; McCulloch, Iain. C., Surgailis, J., Gladisch, J., Ghosh, S., Sheelamanthula, R.,. Side Chain Redistribution as a Strategy to Boost Organic Electrochemical Transistor Performance and Stability.

Advanced Materials

Findings

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