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Effects of Processing-Induced Contamination on Organic Electronic Devices
University of Cambridge, UK.
RISE Research Institutes of Sweden, Bioeconomy and Health, Material and Surface Design.ORCID iD: 0000-0001-6877-9282
University of Cambridge, UK.
Number of Authors: 242023 (English)In: Small Methods, E-ISSN 2366-9608, Vol. 7, no 11, article id 2300476Article in journal (Refereed) Published
Abstract [en]

Organic semiconductors are a family of pi-conjugated compounds used in many applications, such as displays, bioelectronics, and thermoelectrics. However, their susceptibility to processing-induced contamination is not well understood. Here, it is shown that many organic electronic devices reported so far may have been unintentionally contaminated, thus affecting their performance, water uptake, and thin film properties. Nuclear magnetic resonance spectroscopy is used to detect and quantify contaminants originating from the glovebox atmosphere and common laboratory consumables used during device fabrication. Importantly, this in-depth understanding of the sources of contamination allows the establishment of clean fabrication protocols, and the fabrication of organic field effect transistors (OFETs) with improved performance and stability. This study highlights the role of unintentional contaminants in organic electronic devices, and demonstrates that certain stringent processing conditions need to be met to avoid scientific misinterpretation, ensure device reproducibility, and facilitate performance stability. The experimental procedures and conditions used herein are typical of those used by many groups in the field of solution-processed organic semiconductors. Therefore, the insights gained into the effects of contamination are likely to be broadly applicable to studies, not just of OFETs, but also of other devices based on these materials. © 2023 The Authors. 

Place, publisher, year, edition, pages
John Wiley and Sons Inc , 2023. Vol. 7, no 11, article id 2300476
Keywords [en]
Contamination; Nuclear magnetic resonance spectroscopy; Organic field effect transistors; Thermoelectric equipment; Glovebox system; Gloveboxes; Organic electronic devices; Organic electronics; Organic field-effect transistors; Performance; Pipette; Thermoelectric; Thin-film properties; Water uptake; Silicones
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:ri:diva-66723DOI: 10.1002/smtd.202300476Scopus ID: 2-s2.0-85169419699OAI: oai:DiVA.org:ri-66723DiVA, id: diva2:1799188
Note

D.S. and I.E.J. contributed equally to this work. The authors acknowledge funding from the Engineering and Physical Sciences Research Council (EPSRC) (EP/R031894/1, EP/R032025/1, EP/W017091/1). D.S. acknowledges support from the EPSRC Centre for Doctoral Training (CDT) in Sensor Technologies and Applications (EP/L015889/1). I.E.J. acknowledges funding from a Royal Society Newton International Fellowship. A.S. and R.M.O. acknowledge funding from the European Union's Horizon 2020 research and innovation program under the Marie Skłodowska‐Curie grant, MultiStem (No. 895801). D.V. acknowledges the Royal Society for funding in the form of a Royal Society University Research Fellowship (Royal Society Reference No. URF\R1\201590). M.G. and H.S. acknowledge funding from the European Union's Horizon 2020 research and innovation program under the Marie Skłodowska‐Curie grant agreement, UHMob (No 811284). G.S. thanks the Belgian National Fund for Scientific Research (FNRS) for financial support through research project COHERENCE2 No. F.4536.23. G.S. is an FNRS Research Associate. G.S. acknowledges financial support from the Francqui Foundation (Francqui Start‐Up Grant). I.B.D. acknowledges support from the EPSRC Cambridge NanoDTC (EP/L015978/1). H.S. acknowledges funding from a Royal Society Research Professorship (RP\R1\201082). The authors acknowledge support from the Henry Royce Institute facilities grant (EP/P024947/1), as well as the Sir Henry Royce Institute recurrent grant (EP/R00661X/1) for the use of the ambient cluster tool and the EQCM.

Available from: 2023-09-21 Created: 2023-09-21 Last updated: 2024-05-27Bibliographically approved

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