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Electrical characterization of electrodeposited indium sulfide thin films by electrochemical impedance spectroscopy and electrical force microscopy

In this work, we present the use of impedance spectroscopy and electrostatic force microscopy for the electrical characterization of ~100 nm indium sulfide thin films. We demonstrated the usefulness of impedance spectroscopy, as it was possible to characterize films with thicknesses so thin that the...

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Published in:Materials science in semiconductor processing 2020-12, Vol.120, p.105248, Article 105248
Main Authors: Sanchez-Tizapa, M., Sosa-Muñiz, M.C., Flores-Martínez, M., Tostado-Plascencia, M.M., Carreón-Álvarez, M.A., Morán-Lázaro, J.P., Castañeda-Valderrama, R.
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container_start_page 105248
container_title Materials science in semiconductor processing
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creator Sanchez-Tizapa, M.
Sosa-Muñiz, M.C.
Flores-Martínez, M.
Tostado-Plascencia, M.M.
Carreón-Álvarez, M.A.
Morán-Lázaro, J.P.
Castañeda-Valderrama, R.
description In this work, we present the use of impedance spectroscopy and electrostatic force microscopy for the electrical characterization of ~100 nm indium sulfide thin films. We demonstrated the usefulness of impedance spectroscopy, as it was possible to characterize films with thicknesses so thin that they were impossible to detect by X-ray diffraction or ultraviolet spectroscopy. Impedance spectroscopy was used also to characterize grain boundaries, as well as for determining the n-type conductivity of the material. On the other hand, using spreading resistance microscopy, we mapped the surface, and we located the points with higher current flow. Using electrostatic force microscopy we measured the phase angle, which in turn was correlated with voltage drops at the interphase substrate/film in order to calculate the work function of indium sulfide, we have proposed also a scheme for conduction band locations at the interphase between the fluorine tin oxide substrate and the indium sulfide film.
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subjects Atomic force microscopy
Electrostatic force microscopy
Impedance spectroscopy
Indium sulfide
Spreading resistance
Thin film
title Electrical characterization of electrodeposited indium sulfide thin films by electrochemical impedance spectroscopy and electrical force microscopy
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