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30 September 2024 Intermolecular interactions and their relevance for self-assembly and phase behavior in solution processed organic electronics
Harald W. Ade
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Proceedings Volume 13123, Organic, Hybrid, and Perovskite Photovoltaics XXV; 131230T (2024) https://doi.org/10.1117/12.3028819
Event: Organic Photonics + Electronics, 2024, San Diego, California, United States
Abstract
The OSC field has been revolutionized through the development of numerous novel non-fullerene acceptors (NFA). The device stability and mechanical durability of these non-fullerene OSCs is critical and developing devices with high performance, long-term morphological stability, and mechanical robustness remains challenging. We will discuss: 1) our current understanding of the phase behavior of OSC donor:acceptor mixtures and the relation of phase behavior and the underlying hetero- and homo-molecule interactions to performance, processing needs (e.g., kinetic quenches), and morphological and mechanical stability; 2) molecular hetero-interactions between the donor and NFA that are not always the geometric mean of the homo-interactions; molecular interactions that are relevant in understanding in rubber-toughening of OSCs with a SEBS additive; and 3) that ~50% of semi-conducting blends investigated so far exhibit re-entrant phase behavior. The results presented and its ongoing evolution are intended to uncover fundamental molecular structure-function relationships that will allow predictive guidance on how desired properties can be targeted by specific chemical design.
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Harald W. Ade "Intermolecular interactions and their relevance for self-assembly and phase behavior in solution processed organic electronics", Proc. SPIE 13123, Organic, Hybrid, and Perovskite Photovoltaics XXV, 131230T (30 September 2024); https://doi.org/10.1117/12.3028819
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KEYWORDS
Molecular interactions
Organic electronics
Organic photovoltaics
Polymers
Solar cells
Field effect transistors
Organic semiconductors
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