| Abstract [eng] |
Even before the industrial evolution the quality of human life was strongly influenced by the availability of energy. The escalated consumption of traditional energy sources is forecasting energy and environmental crisis. Solar energy is considered the most promising alternative to fossil fuels and coal because the Earth receives an incredible amount of solar energy. Solar cells – are devices which with the help of electron donors and acceptors can convert solar rays into electricity. The main goal of this project was to synthesize efficient and cheap hole transporting semiconductors from aniline and fluorene derivatives, containing vinyl groups, which could be in situ cross-linked and used for perovskite solar cells. New enamines from aniline and fluorene derivatives have been synthesized in this work. Ionization potential was measured, and determined values are in 5,11–5,26 eV range, which shows that these compounds can be used as hole transporting materials in perovskite solar cells. Measurements of hole drift mobility were performed and showed that fluorene derivative with the largest conjugated π electron system demonstrates the best drift mobility value. Other synthesized semiconductors have lower drift mobilities, but they are also suitable for the application in these devices. Thermal analysis of new enamines revealed that they were able to polymerize between 190 and 239 °C. Optimal duration of polymerization at these temperatures is 60 min. In order to lower cross-linking temperatures an aliphatic cross-linker containing four thiol groups was used in thiol-ene thermal cross-linking reactions. In this case cross-linking smoothly proceeded at 140–180 °C. |
