Charge Carrier Photogeneration and Transport in Organic Photoconducting Polymer Nanocomposites Based on Polyimides

ABSTRACT On the base of photo- and thermostable polyimides (PI) and carbazolyl-containing polymers (CzCP) possessing predominantly p-photoconductivity and doped with perylenediimide derivative (PDID) as an acceptor with n-conductivity, the efficient bipolar polymer nanocomposites are developed. The efficient bipolar transport is obtained for microsegregated triple composites (PI-CzCP-PDID and others) in which there are p- and n-microregions with efficient charge photogeneration (quantum yield up to 0.6) at the extended microphase interface and high photoelectrical sensitivity (up to 400 m2/J) in the UV and visible ranges. The photovoltaic effect is investigated for sandwich cells with (Al, ITO) electrodes. The best parameters are found for triple composite films (0.7–1 μm thickness).