Three-layer photoreceptor (Se-SeTe-Se) with high sensitivity in the long-wavelength region

A Se-SeTe-Se three-layered photoreceptor which is highly sensitive, as well as electrically stable, in the red and near-infrared region has been developed. To improve the electrical stability without reducing the sensitivity, the SeTe layer thickness was investigated. Sensitivity for the Se(0.5 µm)-Se0.65Te0.35(0.2 µm)-Se(50 µm) layered photoreceptor is 2300 V/µJ/cm²at 660 nm, and 360 V/µJ/cm²at 800 nm. A photoreceptor drum of this layered configuration, whose sensitivity was designed for an LED light source, was very stable and exhibited high-quality printing characteristics in an LED printer.