Abstract
Electron transport in macroporous GaP networks permeated with electrolyte solutions has been studied under steady-state conditions, by analysis of the photocurrent response upon a small-amplitude modulation of the light intensity. It is found that electron transport is nondispersive, characterized by a single transit time that depends on the thickness of the porous layer and the background light intensity. The transit time is determined by multiple trapping in interfacial states close to the electron Fermi level. The density-of-states function in a considerable region of the band gap can be determined from the transit time, when the energy of the electron Fermi level is changed by the background light intensity.
- Received 24 July 2000
DOI:https://doi.org/10.1103/PhysRevB.62.16926
©2000 American Physical Society