PHOTOCONDUCTIVITY OF LANGMUIR-BLODGETT-FILMS OF CORBATHIENE

Conductivity and photoconductivity properties of multilayer Langmuir-B lodgett (LB) films of corbathiene (similar to 100 nm thick) have been investigated. The conductivity exhibits anisotropic behaviour, i.e. it is different for lateral and transverse directions. Measurements of l ateral photoconductivity and its dependence on wavelength and intensit y of exciting light have been performed. The time-resolved decay of th e photoinduced conductivity is indicative of more than one recombinati on mechanism. The results are related to the optical absorption featur es and discussed in terms of semiconducting concepts. Lateral photocon ductivity has been found to be essentially a bulk property of the film s. All data obtained are well reproducible which means that the LB cor bathiene films are stable at room temperature in the current density r ange investigated (10(-7) to 10(-6) A cm(-2)) when subjected to illumi nation in the wavelength range 300-900 nm (10(16)-10(17) photons cm(-2 ) s(-1)).