Efficient N-Type Organic Electrochemical Transistors and Field-Effect Transistors Based on PNDI-Copolymers Bearing Fluorinated Selenophene-Vinylene-Selenophenes

Kim, J, Ren, X, Zhang, Y, Fazzi, D, Manikandan, S, Andreasen, JW, Sun, X, Ursel, S, Un, HI, Peralta, S, Xiao, M, Town, J, Marathianos, A, Roesner, S ORCID: 0000-0003-2143-4708, Bui, TT, Ludwigs, S, Sirringhaus, H and Wang, S ORCID: 0000-0002-6295-7639 (2023) Efficient N-Type Organic Electrochemical Transistors and Field-Effect Transistors Based on PNDI-Copolymers Bearing Fluorinated Selenophene-Vinylene-Selenophenes. Advanced Science, 10 (29). pp. 1-12. ISSN 2198-3844

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Abstract

n-Type organic electrochemical transistors (OECTs) and organic field-effect transistors (OFETs) are less developed than their p-type counterparts. Herein, polynaphthalenediimide (PNDI)-based copolymers bearing novel fluorinated selenophene-vinylene-selenophene (FSVS) units as efficient materials for both n-type OECTs and n-type OFETs are reported. The PNDI polymers with oligo(ethylene glycol) (EG7) side chains P(NDIEG7-FSVS), affords a high µC* of > 0.2 F cm−1 V−1 s−1, outperforming the benchmark n-type Pg4NDI-T2 and Pg4NDI-gT2 by two orders of magnitude. The deep-lying LUMO of −4.63 eV endows P(NDIEG7-FSVS) with an ultra-low threshold voltage of 0.16 V. Moreover, the conjugated polymer with octyldodecyl (OD) side chains P(NDIOD-FSVS) exhibits a surprisingly low energetic disorder with an Urbach energy of 36 meV and an ultra-low activation energy of 39 meV, resulting in high electron mobility of up to 0.32 cm2 V−1 s−1 in n-type OFETs. These results demonstrate the great potential for simultaneously achieving a lower LUMO and a tighter intermolecular packing for the next-generation efficient n-type organic electronics.

Item Type:	Article
Uncontrolled Keywords:	intermolecular packing; mixed ionic-electronic conductors; n-type conjugated polymers; organic electrochemical transistors; organic field-effect transistors
Subjects:	Q Science > Q Science (General) R Medicine > RS Pharmacy and materia medica
Divisions:	Pharmacy and Biomolecular Sciences
Publisher:	Wiley Open Access
Date of acceptance:	28 July 2023
Date of first compliant Open Access:	23 April 2024
Date Deposited:	23 Apr 2024 11:30
Last Modified:	04 Jul 2025 12:45
DOI or ID number:	10.1002/advs.202303837
URI:	https://researchonline.ljmu.ac.uk/id/eprint/23109

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