Hafnium oxide and Nb doped HfO2 were grown by anodizing sputtering-deposited Hf and Hf-4at.%Nb. Photoelectrochemical characterization was carried out in order to estimate solid state properties such as band gap, flat band potential and electrons internal photoemission threshold energy as a function of thickness and composition of anodic oxides. Impedance measurements were performed in a wide range of electrode potentials in order to study the response of the anodic oxides under anodic and cathodic polarization and to estimate their dielectric constants.
Santamaria, M., Zaffora, A., Di Franco, F., Tranchida, G., Habazaki, H., Di Quarto, F. (2017). Synergistic Use of Electrochemical Impedance Spectroscopy and Photoelectrochemical Measurements for Studying Solid State Properties of Anodic HfO2. ECS TRANSACTIONS, 75(38), 1-15 [10.1149/07538.0001ecst].
Synergistic Use of Electrochemical Impedance Spectroscopy and Photoelectrochemical Measurements for Studying Solid State Properties of Anodic HfO2
SANTAMARIA, Monica;Zaffora, Andrea;DI FRANCO, Francesco;TRANCHIDA, Giada;DI QUARTO, Francesco
2017-01-01
Abstract
Hafnium oxide and Nb doped HfO2 were grown by anodizing sputtering-deposited Hf and Hf-4at.%Nb. Photoelectrochemical characterization was carried out in order to estimate solid state properties such as band gap, flat band potential and electrons internal photoemission threshold energy as a function of thickness and composition of anodic oxides. Impedance measurements were performed in a wide range of electrode potentials in order to study the response of the anodic oxides under anodic and cathodic polarization and to estimate their dielectric constants.
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