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Schottky barrier height tuning by Hybrid organic-inorganic multilayers

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Abstract

Semiconducting and insulating polymers and copolymers/Au nanograins based hybrid multilayers (HyMLs) were fabricated on p-Si single-crystal substrate by an iterative method that involves, respectively, Langmuir-Blodgett and spin-coating techniques (for the deposition of organic film) and sputtering technique (for the deposition of metal nanograins) to prepare Au/HyMLs/p-Si Schottky device. The electrical properties of the Au/HyMLs/p-Si Schottky device were investigated by current-voltage (I-V) measurements in the thickness range of 1–5 bilayers (BL).

At different number of layers, current-voltage (I-V) measurements were performed. Results showed a rectifying behavior. Junction parameters, such as barrier height (BH), from the I-V measurements for example for the PMMA-b-PS based Au/HyMLs/p-Si structure were obtained as 0.72±0.02 eV at 1BL and 0.64±0.02eV at 5BL. It was observed that the BH value of 0.61 eV obtained for the 5 BL PS based Au/HyMLs/p-Si structure was lower than the value of 0.68 eV of conventional Au/p-Si Schottky diodes. Thus, modification of the interfacial potential barrier for Au/p-Si diodes has been achieved using a thin MLs of different polymers based HyMls semiconductor.

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Acknowledgments

This work was supported by the Italian project PON02_00355_3391233 “ENERGETIC”.

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Authors and Affiliations

  1. Laboratory for Molecular Surface and Nanotechnology (LAMSUN), Department of Chemical Sciences, University of Catania and CSGI, Viale A. Doria 6, 95125, Catania, Italy

    V. Torrisi, M. A. Squillaci & G. Marietta

  2. Dipartimento di Fisica ed Astronomia, Università di Catania, and MATIS IMM-CNR, via S. Sofia 64, 95128, Catania, Italy

    F. Ruffino, I. Crupi & M. G. Grimaldi

Authors
  1. V. Torrisi
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  2. M. A. Squillaci
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  3. F. Ruffino
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  4. I. Crupi
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  5. M. G. Grimaldi
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  6. G. Marietta
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Torrisi, V., Squillaci, M.A., Ruffino, F. et al. Schottky barrier height tuning by Hybrid organic-inorganic multilayers. MRS Online Proceedings Library 1660, 19–24 (2014). https://doi.org/10.1557/opl.2014.396

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  • DOI: https://doi.org/10.1557/opl.2014.396

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