Modelling and optimization of perovskite-silicon tandem solar cells under realistic operating conditionsTOMŠIČ, ŠPELA (Avtor) Lipovšek, Benjamin (Mentor) Perovskite-silicon tandem solar cellsenergy yieldopto-electro-thermal modelingoutdoor monitoringbandgap optimizationlight-soaking effectrealistic operating conditionsAdvanced modeling techniques are an important part of any solar cell design process. In the photovoltaic (PV) research field, there has been a pronounced tendency lately to move numerical analysis and optimization of PV devices from standard test conditions to realistic constantly changing outdoor operating conditions. In this respect, long-term energy yield is rapidly becoming an indispensable tool for determining the capabilities of PV devices in realistic operation and thus minimizing the payback time of any solar cell technology emerging on the PV market. The focus of the doctoral dissertation was given to the development of a comprehensive experimentally-calibrated framework embracing a coupled optical-electrical-thermal model for the purpose of evaluating and optimizing the long-term energy yield of perovskite-silicon tandem PV devices in arbitrary operating conditions. The developed energy yield modeling algorithm was first employed to analyze and optimize the two-terminal perovskite-silicon tandem devices in terms of long-term electrical energy production at different geographical locations (selected from distinct Köppen-Geiger-Photovoltaic climate zones) and different plane-of-array orientations. We determined the optimal bandgap of the perovskite sub-cell for each tandem device operation case and thoroughly analyzed the extent of relative energy yield losses attributed to deviations from the optimal bandgap value. Additionally, we illustrated how various environmental aspects impact the operation of the device. Most importantly, we established a strong correlation between the optimal bandgap, and the spectral distribution of incident irradiance, which can serve us as a powerful tool for rapid optimization of the perovskite-silicon tandem devices intended to operate under arbitrary realistic conditions. Finally, we employed our energy yield model to extract and quantify the energy losses attributed to the light-soaking effect (LSE) from the outdoor measurements of the single-junction and tandem perovskite-based devices. Additionally, based on coupled outdoor testing and energy yield modeling we proposed a correlation between the LSE dynamics and the realistic operating conditions of the device. The proposed empirical formalism was used to analyze the energy harvesting losses associated with the LSE for different types of devices operating in different geographical locations. With the presented methodology for accurate extraction and quantification of the energy harvesting losses associated with the light-soaking effect, we provided important insight into the peculiar diurnal behavior of perovskite-based devices in realistic outdoor operation, which may lead to faster development of perovskite solar cells on their road towards commercialization.20242024-07-05 07:20:00Doktorsko delo/naloga159273sl