RESEARCH DIRECTED TOWARD THE STUDY OF PHOTOVOLTAIC EFFECTS IN ORGANIC AND INORGANIC CRYSTALS AND THIS FILMS

摘要

The conditions necessary for the production of various types of photo voltages are described. These are: photovoltages due to homogeneous or in-homogeneous excitat5.on and subsequent production of free carriers in the photoconductor;photovoltages due to collisions of excitons with the elec¬trode whereby the excitons are produced in the photoconductor but do not produce free carriers in this material;photovoltages due to chemical pro¬cesses produced in the photoconductor or in the electrode material;photo¬voltages much larger than the band gap of the photoconductor. The theory of these photovoltages is given for various conditions. Finally the relation¬ship between photovoltages and rectification is given.nThe following special photovoltaic effects have been investigated: photovoltaic effects in organic crystals with liquid and metal electrodes when the photoconductive material is excited and photovoltages in organic crystals produced with special iodine electrodes when these iodine elec-trodes are excited by light.