Transient photostimulated charge transfer from a photoconductor to an insulating fluid

摘要

An investigation was made of photostimulated transfer of charge from a photoconductor into an insulating fluid. A theoretical description of the dynamics of charge−carrier generation and transport in the photoconductor, carrier accumulation at the photoconductor−fluid interface, and charge exchange into the fluid was developed in which the various physical processes are characterized by rate constants. Measurements of the dependence on electric field, light intensity, sample thickness, and carrier mobility in the fluid were carried out to determine which current−limiting mechanisms are dominant. The results illustrate a method of separately determining the interfacial charge−transfer efficiency and the efficiency of supplying photogenerated carriers to the interface.