Photoconductivity measurements in a-Si:H by frequency-resolved spectroscopy

Abstract
The first experimental results of photoconductivity measurements in a-Si:H using in-phase and quadrature frequency-resolved spectroscopy (FRS) are reported. The main feature of the response curves of quadrature FRS is a double peak structure. The relative intensities of the peaks are strongly dependent on external parameters such as temperature and generation rate and on the Staebler-Wronski state, indicating the existence of two recombination mechanisms with different characteristic times.