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

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

Hosseini, Seyed Mehrdad / Universität Potsdam

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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Title :

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

Additional title:

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

Contributors:

Hosseini, Seyed Mehrdad (author) / Shoaee, Safa (tutor) / Neher, Dieter (tutor) / Durrant, James Robert / Universität Potsdam (degree granting institution)

Publication date :

2022

Size :

XII, 103 Seiten

Remarks:

Illustrationen, Diagramme

Type of media :

Theses

Type of material :

Language :

English

Classification :