| Abstract [eng] |
The increasing greenhouse gas emissions and pollution are the main issues caused by the growing consumption of fossil fuels. Therefore, it is of utmost importance to find a new and environmentally friendly way to produce energy. One of the renewable and clean sources is solar radiation which is can be converted into electricity via solar cells. Due to their simple manufacturing and good performance perovskite solar cells (PSC) are one of the most promising photovoltaic devices. In PSC hole transporting layer plays an important role in increasing power conversion efficiency (PCE). Most of the hole transporting materials (HTMs) are characterized by low conductivity and for this reason require oxidative additives which help to improve PSC efficiency. However, using aforementioned additives generate many problems, in particular lower device stability. Many researchers are investigating new dopant-free organic HTMs which could be used in PSC without additives and maintain high PCE. In the literature triphenylamine derivatives with amide moiety is mentioned as new HTMs which could boost their conductivity of carriers. The chemical structure of these molecules allows for the molecule to self-assemble into ordered supramolecular architectures under the light irradiation. Weak interactions in these structures are sufficient to hold the structure together in solution but break when films are manufactured by spin-coating. In this work four new triphenylamine-based compounds with amide functional group have been synthesized and their optical, thermal and photophysical properties investigated. Compounds 16 and 18, containing reactive vinylbenzyloxy moieties, have been studied for their ability to form covalent bonds under the visible light or UV irradiation. Studies has revealed that materials 5, 10 and 16 have appropriate solid state ionization potential and demonstrate the promising self-assembly related UV/Vis/NIR absorption dynamics under irradiation by UV and visible light. |
