An aggregate organic photoconductor. II. Photoconduction properties

The photoconductive properties of an organic aggregate photoconductor are reported. This material shows both electron and hole conduction. The photogeneration efficiency is field dependent and about 0.5 at 106 V/cm. The field and temperature dependences for hole generation are qualitatively consistent with the Onsager theory of geminate recombination. The corresponding dependences of the electron-generation process are obscured by a field-dependent trapping. Drift mobilities, while not directly measured, appear to be in the range of 10−8 cm2/V s. At fields of 6×104 V/cm, the electron and hole ranges are at least 10−8 cm2/V.