Response time distribution. A way to describe the photocurrent transient

The authors studied the secondary photocurrent decay in thin layers of intrinsic amorphous silicon solar cells. The decay of the secondary photocurrent in the coplanar arrangement was measured and simulated in the temperature range from 140 K to room temperature. Data were analysed to obtain response times using different definitions. Instead of observing the measured and modelled transients in the time domain, they introduce an additional processing of the data leading to response time distributions. Different types of response time spectra are compared and the physical origin for the distribution of response times is discussed for Si solar cells.