High-Frequency Operation of Vertical Organic Field-Effect Transistors

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The high-frequency and low-voltage operation of organic thin-film transistors (OTFTs) is a key requirement for the commercial success of flexible electronics. Significant progress has been achieved in this regard by several research groups highlighting the potential of OTFTs to operate at several tens or even above 100 MHz. However, technology maturity, including scalability, integrability, and device reliability, is another crucial point for the semiconductor industry to bring OTFT-based flexible electronics into mass production. These requirements are often not met by high-frequency OTFTs reported in the literature as unconventional processes, such as shadow-mask patterning or alignment with unrealistic tolerances for production, are used. Here, ultra-short channel vertical organic field-effect transistors (VOFETs) with a unity current gain cut-off frequency (fT) up to 43.2 MHz (or 4.4 MHz V−1) operating below 10 V are shown. Using state-of-the-art manufacturing techniques such as photolithography with reliable fabrication procedures, the integration of such devices down to the size of only 12 × 6 µm2 is shown, which is important for the adaption of this technology in high-density circuits (e.g., display driving). The intrinsic channel transconductance is analyzed and demonstrates that the frequencies up to 430 MHz can be reached if the parasitic electrode overlap is minimized.


Original languageEnglish
Article number2201660
Number of pages7
JournalAdvanced Science
Issue number24
Publication statusPublished - 25 Aug 2022

External IDs

PubMed 35754312
WOS 000815754700001
ORCID /0000-0002-9773-6676/work/142247055
ORCID /0000-0002-4230-8228/work/142251406


Research priority areas of TU Dresden

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  • high-frequency organic electronics, organic field-effect transistors, organic thin-film transistors, vertical transistor, Vertical transistor, Organic field-effect transistors, High-frequency organic electronics, Organic thin-film transistors