In organic material engineering and device development carrier transport properties are of primary importance. The main goals of the thesis are advanced characterization by complementary optical and electrical methods of organic semiconductors and the complexes of DNA designed with purposefully controllable properties for opto-, photo- and electrical applications. It was demonstrated that the polymeric materials having an active layer with donor/transmitter/acceptor structure bearing polar molecules exhibits the improvement of the external quantum efficiency associated with the growth of the mobility. The impact of the trapping states and their energetical and spatial distribution on the charge transport properties of organic semiconductors was revealed by several different complementary methods. It was demonstrated that carrier trapping is effectively involved in the charge transport phenomena, depending on the exciting light spectral range and applied electrical field. The influence of the hybrid DNA, dyes and silica material complexes on the optical properties of bio-organic materials was proven. Later the new cationic surfactant with a high efficiency third order nonlinear optical properties was demonstrated, which extended the range of available solvents for DNA complex for optoelectronic applications.
Study of carrier transport, trapping and optical nonlinearities in promising polymers for optoelectronic applications