過渡電流波形解析による積層有機感光体の評価（第2報）

—積層感光体における過渡電流波形—

抄録

D. C. transient currents of orgnic layered photoreceptors were measured under various conditions to obtain the information about charge carrier injection at the substrate-CGL (Charge Generation Layer) and CGL-CTL (Charge Transport Layer) interfaces. In the small voltage addition, the D. C. transient currents strongly depended on whether the energy barrier exists or not between CGL and CTL. Similar behavior was observed in transient currents under light irradiation, well corresponding to the residual potential in photo-induced decays of the photoreceptors. It was shown that the variety of corona charge acceptance of photoreceptors due to the purity of CG material, metal-free phthalocyanine in this study, was found to depend on the degree of Schottky-barrier formation between Al substrate and CGL. The concentration of CT compounds in CTL was well reflected on the Fourier transform spectra of transient currents. Space charge polarization process within the photoreceptor occurred more slowly by decreasing the concentration of CT compounds and the value of 15 Å was obtained as the critical intermolecular distance for the charge carrier hopping.