Designing Contact Independent High-Performance Low-Cost Flexible Electronics.

Autor: Waldrip M; Department of Physics and Center for Functional Materials, Wake Forest University, Winston-Salem, NC, 27109, USA., Yu Y; Department of Physics and Center for Functional Materials, Wake Forest University, Winston-Salem, NC, 27109, USA., Dremann D; Department of Physics and Center for Functional Materials, Wake Forest University, Winston-Salem, NC, 27109, USA., Losi T; Center for Nano Science and Technology, Istituto Italiano di Tecnologia, Via Rubattino 81, Milano, 20134, Italy., Willner B; Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford, OX1 3TA, UK., Caironi M; Center for Nano Science and Technology, Istituto Italiano di Tecnologia, Via Rubattino 81, Milano, 20134, Italy., McCulloch I; Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford, OX1 3TA, UK.; Andlinger Center for Energy and the Environment, and Department of Electrical and Computer Engineering, Princeton University, Princeton, NJ, 08544, USA., Jurchescu OD; Department of Physics and Center for Functional Materials, Wake Forest University, Winston-Salem, NC, 27109, USA.
Jazyk: angličtina
Zdroj: Advanced materials (Deerfield Beach, Fla.) [Adv Mater] 2024 Nov; Vol. 36 (48), pp. e2410442. Date of Electronic Publication: 2024 Oct 09.
DOI: 10.1002/adma.202410442
Abstrakt: Organic semiconductors enable low-cost solution processing of optoelectronic devices on flexible substrates. Their use in contemporary applications, however, is sparse due to persistent challenges in achieving the requisite performance levels in a reliable and reproducible manner. A critical bottleneck is the inefficiency associated with charge injection. Here, large-scale simulations are employed to identify operational windows where key device parameters that are difficult to control experimentally, such as the contact resistance, become less consequential to overall device functionality. This design methodology overcomes injection barrier limitations in organic field-effect transistors (OFETs), leading to high charge carrier mobility and significantly expanding the range of suitable electrode materials. Leveraging this new understanding, all-organic, solution-deposited OFETs are successfully fabricated on flexible substrates. These devices incorporate printed contacts and showcase mobilities exceeding 5 cm 2  Vs -1 . These results provide a route for accessing the fundamental limits of material properties even in the absence of ideal contacts - a critical step in establishing reliable structure/property relationships and optimal material design paradigms. While reducing the injection barrier and contact resistance remains critical for achieving high OFET performance, this work demonstrates a path toward consistently achieving high charge carrier mobility through device geometry design, ultimately reducing processing complexity and cost.
(© 2024 The Author(s). Advanced Materials published by Wiley‐VCH GmbH.)
Databáze: MEDLINE
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