| Abstract [eng] |
Perovskite solar cells currently is the fastest developing technology for the solar energy harvesting. Their progress is strongly dependent on the used organic materials, in particular hole-transporting materials (HTMs). In the scope of this dissertation, several issues related to HTMs are addressed, i.e., efficient synthesis, doping-induced degradation, and the alternative layer formation method. First, a simple synthetical pathway which leads to HTMs with a stable amorphous phase was developed. It was further adapted to the synthesis of carbazole-based HTMs, which shoved good performance in perovskite solar cells. Next, another parameter, long-term stability, which is important for successful commercial application, was addressed. Due to their low conductivity in the pristine state, HTMs are used in a combination with several dopants. It was shown that oxidized HTM species undergo a chemical reaction with 4-tert-butylpyridine (tBP), and novel species are formed. Finally, seeking for a way to exclude dopants from the HTM composition, a novel layer formation procedure was proposed, utilizing self-assembly on indium tin oxide substrate. The devices made with such layers have shown a very promising efficiency of 17.8% thus making this alternative approach attractive for further development. In conclusion, this work presents a significant improvement in the field of HTMs for perovskite solar cells by setting a new pathway for the development of functional materials. |
