Therefore, similarities and differences of various distributions under photoconductivity conditions were left unexplored. A better understanding of MT can be obtained when both free and trapped electron densities can be observed and analyzed.
Photoconductivity is related to free electrons.
The time dependence of free and trapped electron densities based on MT rate equations were obtained and analyzed for exponential, rectangular, linear, Gaussian distributions. Power law behavior occurs only under very limited conditions. Furthermore when it does occur, it is only over a limited time range, and unlike experimental observation it does not exhibit a transition to a second steeper power law at longer times. Although the exponential region remains at longer times, the time constant is a composite of several time constants.