DataVXAdvanced Functional MaterialsPaper
journal article·2020-11Open access

Suppressing Co‐Crystallization of Halogenated Non‐Fullerene Acceptors for Thermally Stable Ternary Solar Cells

Sandra Hultmark, Sri Harish Kumar Paleti, Albert Harillo, Sara Marina, Ferry Anggoro Ardy Nugroho, Yanfeng Liu, Leif K. E. Ericsson, Ruipeng Li, Jaime Martín, Jonas Bergqvist, Christoph Langhammer, Fengling Zhang, Liyang Yu, Mariano Campoy‐Quiles, Ellen Moons, Derya Baran, Christian Müller

Advanced Functional Materials· Volume 30· Issue 48
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Source abstract

Abstract

Abstract While photovoltaic blends based on non‐fullerene acceptors are touted for their thermal stability, this type of acceptor tends to crystallize, which can result in a gradual decrease in photovoltaic performance and affects the reproducibility of the devices. Two halogenated indacenodithienothiophene‐based acceptors that readily co‐crystallize upon mixing are studied, which indicates that the use of an acceptor mixture alone does not guarantee the formation of a disordered mixture. The addition of the donor polymer to the acceptor mixture readily suppresses the crystallization, which results in a fine‐grained ternary blend with nanometer‐sized domains that do not coarsen due to a high Tg ≈ 200 °C. As a result, annealing at temperatures of up to 170 °C does not markedly affect the photovoltaic performance of ternary devices, in contrast to binary devices that suffer from acceptor crystallization in the active layer. The results indicate that the ternary approach enables the use of high‐temperature processing protocols, which are needed for upscaling and high‐throughput fabrication of organic solar cells. Further, ternary devices display a stable photovoltaic performance at 130 °C for at least 205 h, which indicates that the use of acceptor mixtures allows to fabricate devices with excellent thermal stability.
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Research context

PolymersNanomaterialsElectronic materialsMaterials processing

OpenAlex topics: Organic Electronics and Photovoltaics · Conducting polymers and applications · Perovskite Materials and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Chemistry and Chemical Engineering Chalmers University of Technology Göteborg 41296 Sweden

King Abdullah University of Science and Technology (KAUST) Division of Physical Sciences and Engineering and KAUST Solar Center (KSC) Thuwal 23955‐6900 Saudi Arabia

Institut de Ciència de Materials de Barcelona (ICMAB‐CSIC) Campus de la UAB Bellaterra 08193 Spain

POLYMAT and Polymer Science and Technology Department Faculty of Chemistry University of the Basque Country UPV/EHU Paseo Manuel de Lardizabal 3 Donostia‐San Sebastián 20018 Spain

Ikerbasque Basque Foundation for Science Bilbao 48013 Spain

Department of Physics Chalmers University of Technology Göteborg 41296 Sweden

Department of Physics Chemistry and Biology (IFM) Linköping University Linköping 58183 Sweden

Department of Engineering and Physics Karlstad University Karlstad 65188 Sweden

National Synchrotron Light Source II Brookhaven National Laboratory New York NY 11973 USA

Key Laboratory of Green Chemistry and Technology of Ministry of Education College of Chemistry Sichuan University Chengdu 610064 China

Funding

King Abdullah University of Science and Technology · Knut och Alice Wallenbergs Stiftelse · European Research Council · National Natural Science Foundation of China

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