A review of recent results on electrochemical determination of the density of electronic states of nanostructured metal-oxide semiconductors and organic hole conductors

The paper reviews recent results on electrochemical methods applied to the determination of the density of electronic states in several components of advanced nanostructured devices such as the dye solar cell (Gratzel cell), switchable displays, and sensors. We discuss the application of cyclic voltammetry and impedance spectroscopy to determine the chemical capacitance of mesoporous metal-oxide semiconductors (mainly TiO2), organic hole transport materials, and molecular functionalizing elements. (c) 2007 Elsevier B.V. All rights reserved.