Generation, recombination and extraction of charges in polymer fullerene bulk heterojunction solar cells
Dissertation, Universität Potsdam, 2014
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| Sprache: | eng |
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Potsdam
2014
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Tag hinzufügen | Zusammenfassung: | Dissertation, Universität Potsdam, 2014 A dramatic efficiency improvement of bulk heterojunction solar cells based on electron-donating conjugated polymers in combination with soluble fullerene derivatives has been achieved over the past years. Certified and reported power conversion efficiencies now reach over 9% for single junctions and exceed the 10% benchmark for tandem solar cells. This trend brightens the vision of organic photovoltaics becoming competitive with inorganic solar cells including the realization of low-cost and large-area organic photovoltaics. For the best performing organic materials systems, the yield of charge generation can be very efficient. However, a detailed understanding of the free charge carrier generation mechanisms at the donor acceptor interface and the energy loss associated with it needs to be established. Moreover, organic solar cells are limited by the competition between charge extraction and free charge recombination, accounting for further efficiency losses. A conclusive picture and the development of precise methodologies for inves… |
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| Beschreibung: | Enthält 13 Publikationen mit DOI-Angabe |
| Beschreibung: | IV, 140 Seiten Illustrationen, Diagramme |