Development of Synthetically Accessible Glycolated Polythiophenes for High-Performance Organic Electrochemical Transistors

Ding, BowenMartín, JaimeHeeney, Martin2024-07-162024-07-162024-04Ding, B., Le, V., Yu, H., Wu, G., Marsh, A. V., Gutiérrez‐Fernández, E., et al. (2024). Development of Synthetically Accessible Glycolated Polythiophenes for High‐Performance Organic Electrochemical Transistors. Adv Elect Materials 10, 2300580. doi: 10.1002/aelm.2023005802199-160Xhttp://hdl.handle.net/2183/38079[Abstract]: Four glycolated polythiophene-based organic mixed ionic-electronic conductors(OMIECs), PE2gTT, PE2gT, PT2gTT, and PT2gT are prepared by atom-eﬃcientdirect arylation polymerization, avoiding the need for toxic organometallic pre-cursors. PE2gT, PT2gTT, and PT2gT are operable in p-type accumulation modeorganic electrochemical transistors (OECTs), with PT2gT displaying the bestdevice performance with a μC* product ﬁgure-of-merit of 290 F cm−1 V−1 s−1 .A record volumetric capacitance among p-type glycolated polythiopheneOMIECs of 313 F cm−3 is observed for PE2gT, ascribed to the high proportion-ality of polar components in its materials design. The good OECT performanceof PE2gT with μC* = 84.2 F cm−1 V−1 s−1 , comparable with state-of-the-artpoly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS)devices, coupled with its synthetic accessibility and favorable accumulationmode operation makes PE2gT an ideal glycolated alternative to PEDOT:PSS inbioelectronics. PE2gT with the least negative threshold voltage also displaysthe best OECT operational cycling stability, linked to better resistance ofits oxidized state against parasitic redox side reactions . Shelf life stability ofOECTs stored (without bias) is observed to be better for materials with a morenegative threshold voltage and higher average molecular weight (PT2gT),that are less susceptible to ambient auto-oxidation and ﬁlm delamination.engCC BY 4.0 https://creativecommons.org/licenses/by/4.0/http://creativecommons.org/licenses/by/3.0/es/BioelectronicsOrganic electrochemical transistorOrganic electronicsPolymersSemiconductorsDevelopment of Synthetically Accessible Glycolated Polythiophenes for High-Performance Organic Electrochemical Transistorsjournal articleopen accesshttps://doi.org/10.1002/AELM.202300580