Graduate theses
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Title |
Εναπόθεση διαφανών αγώγιμων οξειδίων πάνω σε περοβσκιτικά ηλιακά κελιά |
Author
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Σοφία Αντωνοπούλου
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Thesis advisor
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Πελεκάνος, Νικόλαος
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Abstract |
In recent years, the scientific community has focused on perovskite photovoltaics (PV), considering that they can be made cheaper than silicon ones and that they have seen a spectacular increase in their efficiency within the last few years. Thus, in this work, in an attempt to increase the efficiency of perovskite PVs through their use in tandem devices, we focused on the deposition of transparent conducting oxides such as ITO on Spiro-OMeTAD. The latter is the typical hole transport layer in a perovskite device, which is often destroyed by the ITO forcible deposition. In the first experiments, ITO was directly deposited on perovskite PV devices using different conditions, in order to find the optimal conditions that are the least harmful to Spiro-OMeTAD. A significant decrease in PV efficiency was found in all cases, which prompted us to search for candidate materials as a protective layer of Spiro-OMeTAD during ITO deposition. For this reason, thin films of molybdenum oxide were tested with different deposition techniques such as sputtering and e-beam sublimation. Between the two techniques, e-beam deposition gave better results, showing a significant increase in the photocurrent, with a parallel reduction however in the open circuit voltage. Overall, a small increase in the PV efficiency was observed and the results of this work are encouraging for future research.
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Language |
Greek |
Issue date |
2023 |
Collection
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School/Department--School of Sciences and Engineering--Department of Materials Science and Technology--Graduate theses
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Type of Work--Graduate theses
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Permanent Link |
https://elocus.lib.uoc.gr//dlib/c/0/f/metadata-dlib-user1700057649-24783.tkl
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Views |
419 |