Abstract

Nowadays, a great progress in the areas of molecular and hybrid photovoltaics is observed. The devices based on organic and perovskite materials are getting attention mostly due to their low cost production process. However, their efficiency and stability are still lower than for inorganic materials which make them less popular. Therefore, a detailed understanding of the device physics is fundamental for organic and perovskite solar cells. The goal of this thesis is to understand which processes influence the electrical properties of both types of solar cells. Here, numerical and experimental techniques are used to accurately determine and understand electrical phenomena taking place in both photovoltaic cells. The special attention is paid to different effects, including excitonic processes, interface phenomena or recombination mechanisms which affect the photovoltaic parameters. The results of the thesis should help in further development of aforementioned solar cells.

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