Characterization of Semiconductors from Photoconductivity Techniques: Uniform and Polychromatic Illumination

C. LONGEAUD; J. A. SCHMIDT; J. P. KLEIDER

Photoconductivity and Photoconductive Materials: Fundamentals, Techniques and Applications

John Wiley & Sons Ltd

Lugar: Chichester, West Sussex; Año: 2022; p. 1 - 26

In a first part we shall concentrate on the CPM that was successfully applied to many thin film materials such as hydrogenated amorphous silicon (a-Si:H), nano and micro crystalline silicon, etc. We shall present the basic principle of this technique which consists in maintaining the photocurrent constant while changing the photon energy. Then, after presenting the experimental set-up we shall show some experimental results and the different procedures that were suggested to extract information on the DOS of the studied material, as well as the limits of this technique. We present in a second part the bases of this Fourier transform analysis and, after presenting an experimental set-up, we show that it can be applied to solar devices and various materials, such as perovskites, to investigate their optoelectronic properties.