Abstract: An organic conductive system was made by using densely TNF-doped polymer matrix in its charge transport layer(CTL) and ε CuPc dispersion in its charge generation layer(CGL). Polymer films with various TNF concentrations(10～50%)remained completely transparent even after 8 h drying at 80℃ followed by nearly half year adaptation. This implies that the traditional difficulties of TNF, such as poor compatibility with traditional polymer matrix and consequently the unreality of doping at high concentration, were resolved in a good fashion. It was experimentally found that the photoreceptor has a good charge acceptance as manifested by its saturated surface potentials of ever lower than +950 V for all investigated TNF concentrations and that the dark decay can be restrained down to 3.3 V/s by adjusting the type of polymer used in CGL. The photoreceptor showed good photosensitivities in the whole visible spectrum with pronounced peaks occurring at 550, 650, and 750 nm. The half decay exposures at 750 and 820 nm were 1.93 μJ/cm² and 2.81 μJ/cm²,respectively.

Key words: organic photoconduction, positive charge, TNF doping at high concentration