Abstract
In this paper, the measurement of quantum efficiency of double layered organic photoreceptor by the transient surface potential drop method is reported.
The quantum efficiency is dependent on light intensity and charge carrier transport layer thickness. The surface voltage drop should be measured at the low level of light intensity and for the sample with layer thickness from 5 μm to 10 μm.
The total quantum efficiency is a product of carrier generation and injection efficiencies from the charge carrier generation layer to the charge carrier transport layer. The quantum efficiencies under the high and low electric fields reflect the carrier generation and injection behaviors, respectively. The thermalization length r0 and the initial dissociation probability φ0 are calculated as 45 Å and 5.3 × 10-2 using the value of quantum efficiency, respectively.
