DRIFT MOBILITY OF MONOLAYER PHOTORECEPTOR WITH H-2-PHTHALOCYANINE

The carrier transport mechanism of a positively charged monolayer phot oreceptor consisting of x-type metal-free phthalocyanine (x-H(2)Pc) an d a binder resin was studied. This monolayer photoreceptor is characte rized by high photosensitivity, low residual potential, and flat spect ral response between 600 and 800 nm caused by a new specific interacti on between x-H(2)Pc and the binder resin. In this study, we measured t he drift mobility (mu) of the photoreceptor, using the time-of-light t echnique. The drift mobility of holes for this monolayer photoreceptor varied from 1.5 X 10(-6) to 8.0 X 10(-6) cm(2) . V-1. sec(-1) as the field strength increased from 1.0 x 10(5) V . cm(-1) to 7.0 X 10(5) V . cm(-1):105 V/cm. The temperature dependence of the mobility was fitt ed to an equation, mu = mu(0) exp(-E(a)/kT), which indicated that the transport of holes was dominated by a thermally activated hopping proc ess. Furthermore, we examined the effects of binders of the photorecep tor on the transport properties, with results suggesting that the char acteristic induction period on the photoinduced decay curve was relate d to the photocurrent curve.