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Depletion-type organic thin-film transistors based on solution-processed iron phthalocyanines fabricated on plastic substrates

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Abstract

In this study, iron phthalocyanine (FePc) thin films were obtained by spin-coating at 80°C and used as the active layer in organic thin-film transistors (OTFTs). The OTFTs have an inverted coplanar structure and were fabricated on plastic substrates made of polyethylene terephthalate. Silicon oxide spin-on glass was used as gate dielectric. The FePc thin films were characterized by UV-Vis spectroscopy, Raman spectroscopy and current–voltage measurements. Interestingly, the electrical characteristics of the FePc OTFTs exhibited a depletion-type behaviour. The threshold voltage extracted was −1.18 V, the subthreshold slope was 0.1 V per decade and the field-effect mobility was 0.002 cm2 Vs−1. As far as we know, this is the first report of FePc-based OTFTs on plastic substrates.

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Acknowledgment

This work was supported by Fondo Sectorial de Investigación para la Educación CONACyT-SEP Ciencia Basica [grant numbers A1-S-7888 and 255062]. A Luna and O Obregon would like to thank CONACyT-Mexico for the scholarships awarded. We would like to thank the IFUAP-BUAP Central Physics Laboratory for the optical characterization and J Luna-López for the assistance in the electrical characterization. M Dominguez thanks Filmtronics Inc. PA, USA, for the supplies provided.

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Authors and Affiliations

  1. Centro de Investigaciones en Dispositivos Semiconductores, Instituto de Ciencias, Benemérita Universidad Autónoma de Puebla (BUAP), 72570, Puebla, Mexico

    Anayantzi Luna, Ovier Obregon, Jose L Sosa-Sanchez & Miguel A Dominguez

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  1. Anayantzi Luna
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  2. Ovier Obregon
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  3. Jose L Sosa-Sanchez
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  4. Miguel A Dominguez
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Correspondence to Miguel A Dominguez.

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Luna, A., Obregon, O., Sosa-Sanchez, J.L. et al. Depletion-type organic thin-film transistors based on solution-processed iron phthalocyanines fabricated on plastic substrates. Bull Mater Sci 45, 20 (2022). https://doi.org/10.1007/s12034-021-02607-y

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  • DOI: https://doi.org/10.1007/s12034-021-02607-y

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