Organic solar cells (OSCs), in recent years, have shown high efficiencies through the development of novel non-fullerene acceptors (NFAs). Fullerene derivatives have been the centerpiece of the accepting materials used throughout organic photovoltaic (OPV) research. However, since 2015 novel NFAs have been a game-changer and have overtaken fullerenes. However, the current understanding of the properties of NFAs for OPV is still relatively limited and critical mechanisms defining the performance of OPVs are still topics of debate. In this thesis, attention is paid to understanding reduced-Langevin recombination with respect to the device physics properties of fullerene and non-fullerene systems. The work is comprised of four closely linked studies. The first is a detailed exploration of the fill factor (FF) expressed in terms of transport and recombination properties in a comparison of fullerene and non-fullerene acceptors. We investigated the key reason behind the reduced FF in the NFA (ITIC-based) devices which is faster non-geminate recombination relative to the fullerene (PCBM[70]-based) devices. [...]


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    Titel :

    Non-langevin recombination in fullerene and non-fullerene acceptor solar cells


    Weitere Titelangaben:

    Nicht-Langevin-Rekombination in Fulleren- und Nicht-Fulleren-Akzeptor-Solarzellen


    Beteiligte:
    Hosseini, Seyed Mehrdad (Autor:in) / Shoaee, Safa (Akademische:r Betreuer:in) / Neher, Dieter (Akademische:r Betreuer:in) / Durrant, James Robert / Universität Potsdam (Grad-verleihende Institution)

    Erscheinungsdatum :

    2022


    Format / Umfang :

    XII, 103 Seiten


    Anmerkungen:

    Illustrationen, Diagramme


    Medientyp :

    Hochschulschrift


    Format :

    Print


    Sprache :

    Englisch


    Klassifikation :

    BKL:    33.68 Oberflächen, Dünne Schichten, Grenzflächen / 53.36 Energiedirektumwandler, elektrische Energiespeicher