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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    Title :

    Generation, recombination and extraction of charges in polymer : fullerene bulk heterojunction solar cells ; cumulative dissertation


    Additional title:

    Generierung, Rekombination und Extraktion von Ladungen in Polymer : Fulleren Mischsolazellen


    Contributors:

    Publication date :

    2015


    Size :

    Online-Ressource (PDF-Datei: IV, 140 S., 11593 KB)


    Remarks:

    graph. Darst.


    Type of media :

    Theses


    Type of material :

    Electronic Resource


    Language :

    English



    Classification :

    DDC:    621.31244
    BKL:    53.36 Energiedirektumwandler, elektrische Energiespeicher