Optimization of p/n multilayer structure for organic photoreceptor device

Organic photoreceptor devices fabricated with titanyl phthalocyanine as a p-type semiconductor and perylene dye as a n-type semiconductor were fabricated with various p/n multilayer structures. Fabrication of the device including p/n junction gave one-order increase in on/off ratio as compared with that without the junction. When the device has multiple p/n junctions, the decrease of driving voltage was also observed. The multilayer p/n structure shows the improvement of the device performance.