Numeric modeling of the photogeneration of free charge carriers

We have numerically studied the dependence of the photogeneration efficienc y of free charge carriers on different radii distribution functions in the framework of the Onsager theory. The distribution function of the thermaliz ation distance greatly influences the form of the theoretical curve. Disord er in the system considered could be beneficial for the photogeneration of charge carriers. Further, the dielectric constant was found to have a great effect on the photogeneration process, especially at low fields. We propos e that one possible way of improving the quantum yield of the photogenerati on of charge carriers is using a material of high dielectric constant. (C) 2000 Elsevier Science B.V. All rights reserved.