Evaluation of anisotropic charge carrier mobility of perylene single crystals by time-of-flight method

Abstract

The charge carrier mobilities along the vertical and lateral directions of perylene platelet single crystals were measured by the time-of-flight (TOF) method. In the lateral directional measurement, the entire region between electrodes was irradiated to obtain measurable signals. The transient photocurrent was different from the conventional TOF measurements; hence, we developed an analytic method for lateral directional measurement. The electron mobilities along the thickness and lateral directions were 0.33 and 2.0 cm2·V−1·s−1 and the hole mobilities were 0.12 and 0.6 cm2·V−1·s−1, respectively.