Investigation of stability of highly efficient polymer solar cells as a function of device structure and interfacial layers
Elena Barulina a b, Sadok Ben Dkhil b, Pavlo Perkhun a, Jean-Jacques Simon c, Olivier Margeat a, Jörg Ackermann a, Christine Videlot-Ackermann a
a Aix-Marseille University, Centre Interdisciplinaire de Nanosciences de Marseille CINaM, UMR CNRS 7325, Marseille, France, CINaM Campus de Luminy, Marseille, 13288, France
b Dracula Technologies, Valence, France
c Aix Marseille University, University Toulon, CNRS, IM2NP, Marseille, France, France
International Conference on Hybrid and Organic Photovoltaics
Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV18)
Benidorm, Spain, 2018 May 28th - 31st
Organizers: Emilio Palomares and Rene Janssen
Poster, Elena Barulina, 307
Publication date: 21st February 2018

Polymer solar cells (PSCs) nowadays reached maturity in terms of performance and processing what made them promising candidates for niche markets. Thanks to extensive research in organic materials including recently developed non-fullerene acceptors (NFAs), device structure and interfacial layers they have reached power conversion efficiencies (PCEs) over 14% at lab scale level [1]. It is important therefore now to investigate the stability of those high-efficiency solar cells in order to evaluate their real potential for applications.  Recently we have studied the thermal stability of PSCs using fullerene in combination PTB7 and could demonstrate the importance of interfacial layers to reduce performance losses. [2,3]

 Here we study in detail the impact of the device structure, interfacial layers and an acceptor on the stability of PSC using PTB7-Th as a donor that gives high performance with both PC70BM as fullerene and ITIC as non-fullerene acceptor, while metal oxide based interfacial layers such as NiO and WO3, are compared to PEDOT:PSS. The influence of these modifications on solar cell performance and most importantly device will be presented under continuous illumination (AM 1.5 G) ISOS-L-1 Laboratory weathering, ISOS-D-1 Shelf, and ISOS-D-2 high-temperature storage.

1. Shaoqing, Zhang et al. "Over 14% Efficiency in Polymer Solar Cells Enabled by a Chlorinated Polymer Donor.“ Adv. Mater. (2018).

2. Ben Dkhil, Sadok, et al. “Toward High‐Temperature Stability of PTB7‐Based Bulk Heterojunction Solar Cells: Impact of Fullerene Size and Solvent Additive.”Adv. Energy Mater. (2017).

3. Ben Dkhil, Sadok, et al. "Interplay of interfacial layers and blend composition to reduce thermal degradation of polymer solar cells at high temperature." ACS applied materials & interfaces (2018).

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