Journal
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
Volume 9, Issue 12, Pages 845-849Publisher
SPRINGER
DOI: 10.1007/s10008-005-0025-7
Keywords
potentiodynamic electrochemical impedance spectroscopy; multivariate electrochemical response analysis; semiconductor-electrolyte interface; Mott-Schottky plots
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Potentiodynamic electrochemical impedance spectroscopy provides extraction of potential-dependent space charge layer capacitance from potentiodynamic impedance spectra of non-stationary semiconductor-electrolyte interface. The new technique has been applied for acquisition of Mott-Schottky plots of cathodically treated TiO2 anodic films. Cathodic treatment in 1 M H2SO4 increases donor density and flat band potential of TiO2. Freshly doped films show hysteresis in the space charge layer capacitance in cyclic potential scans. The subsequent cycling eliminates the hysteresis but preserves the greater part of the doping effect.
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