Effective control over the photoelectric properties of triphenylamine-containing polyimides

Photoconductivity, the quantum yield of photogeneration, and carrier drift mobility have been studied in electric fields F = (0.1-10) x 10(5) V/cm in thin films of polyimide organic semiconductors, both unsensitized and sensitized with a dye. The introduction of dye leads to a substantial increase in photoconductivity (by 2-3 orders of magnitude) and in the drift mobilities of holes and electrons. The electron mobility grows to its maximum extent, becoming as high as similar to 10(-3) cm(2)/(V s) at room temperature and at F approximate to 10(4) V/cm. (C) 2001 MAIK "Nauka/Interperiodica".