Achieving ideal transistor characteristics in conjugated polymer semiconductors.

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Article
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Abstract

Organic thin-film transistors (OTFTs) with ideal behavior are highly desired, because nonideal devices may overestimate the intrinsic property and yield inferior performance in applications. In reality, most polymer OTFTs reported in the literature do not exhibit ideal characteristics. Supported by a structure-property relationship study of several low-disorder conjugated polymers, here, we present an empirical selection rule for polymer candidates for textbook-like OTFTs with high reliability factors (100% for ideal transistors). The successful candidates should have low energetic disorder along their backbones and form thin films with spatially uniform energetic landscapes. We demonstrate that these requirements are satisfied in the semicrystalline polymer PffBT4T-2DT, which exhibits a reliability factor (~100%) that is exceptionally high for polymer devices, rendering it an ideal candidate for OTFT applications. Our findings broaden the selection of polymer semiconductors with textbook-like OTFT characteristics and would shed light upon the molecular design criteria for next-generation polymer semiconductors.

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Keywords
40 Engineering, 3403 Macromolecular and Materials Chemistry, 4016 Materials Engineering, 34 Chemical Sciences
Journal Title
Sci Adv
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Journal ISSN
2375-2548
2375-2548
Volume Title
Publisher
American Association for the Advancement of Science (AAAS)
Sponsorship
EPSRC (EP/W017091/1)
European Commission Horizon 2020 (H2020) ERC (101020872)
European Research Council (610115)
Engineering and Physical Sciences Research Council (EP/M005143/1)
EPSRC, ERC

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2023-06-23 10:36:13
Published version added
2023-05-19 00:30:34
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