Modulated photocurrent to characterize the density of states of thin film semiconductors in the recombination regimeM. E. Gueunier, C. Longeaud and J. P. KleiderEur. Phys. J. Appl. Phys., 26 2 (2004) 75-85DOI: https://doi.org/10.1051/epjap:2004025