| Abstract [eng] |
Much research has been done on single, separate carbon nanotubes (CNTs). Theoretical analysis of ongoing processes and explanation of experimentally measured data in such molecular systems are simpler and easier to implement. However, many practical applications require a bigger amount of material in one place. Analysis of physical processes, taking place in such layers of entangled CNTs, becomes more complicated, and thus the results are often controversial across different publications. Photovoltaic applications require a clear understanding of the photovoltaic processes in the materials, including exciton formation and charge carrier generation, as well as their subsequent dynamics. This dissertation aims to reveal photoelectric processes in CNT layers, formed from PFO Bpy copolymer-wrapped semiconducting (6,5) chirality single-wall carbon nanotubes (SWCNTs) and their blends with [6,6]-phenyl-C61-butyric acid methyl ester (PCBM), in the broad timescale. This includes fast and ultrafast processes, starting with optical excitation induced exciton formation, free charge carrier separation, and following their migration and recombination. The time interval, examined in the dissertation, also includes particularly slow processes, such as the formation and decay of long-lasting built-in electric field, induced by an external electric field. |
