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Analysis of ITO surface modified with aromatic-based self-assembled molecules

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Abstract

This study focuses on characterization and enhancement of indium tin oxide (ITO) surface by using a self-assembled monolayer (SAM) technique. It is generally used to establish a compatible interface and a good charge injection from ITO surface. New generation organic semiconductor molecules such as dibenzo[a,c]phenazine-11-carboxylic acid, 4-(9H-carbazol-9-yl) benzoic acid, 4-(2,5-di-2-thienyl-1H-pyrrol-1-yl) benzoic acid, 5-[(diphenyl) amino]isophthalic acid and 5-[(3-methylphenyl)(phenyl)amino]isophthalic acid were coated on ITO. The surface of ITO was characterized by scanning spreading resistance microscopy, Kelvin probe force microscopy, scanning tunnelling microscopy, X-ray photoelectron spectroscopy and cyclic voltammetry techniques to ensure the chemical bonding of SAM materials on it.

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Notes

  1. Spectral analysis included a background subtraction (Shirley background) and peak separation using mixed Gaussian–Lorentzian functions, in a least squares curve-fitting program (WinSpec) developed at the LISE Laboratory of the Facultés Universitaires Notre-Dame de la Paix, Namur, Belgium.

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Acknowledgements

This study was supported by TUBITAK under Grant No. TBAG-108T718. The author thanks Dr S Sivananthan from UIC (USA) for XPS facilities at Microphysics Lab. The author also gratefully thanks S Demic and M Can at Ege University for the synthesis of SAM molecules. The author greatly appreciates S Okur for providing AFM and STM facilities at IZTECH Lab. All data used in this study were taken from the author’s PhD thesis.

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Correspondence to Ali Kemal Havare.

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Havare, A.K. Analysis of ITO surface modified with aromatic-based self-assembled molecules. Bull Mater Sci 43, 266 (2020). https://doi.org/10.1007/s12034-020-02178-4

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