Regensburg 2022 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 1: Organic Electronics and Photovoltaics 1

CPP 1.1: Hauptvortrag

Montag, 5. September 2022, 09:30–10:00, H38

Ternary blend approach for boosting performance and stability of organic solar cells — •Tayebeh Ameri — University of Edinburgh, School of Engineering, Edinburgh, UK

Organic solar cells (OSCs) have now reached power conversion efficiencies over 18% on laboratory-scale devices, an important milestone towards their commercialization. The evolution in organic photovoltaic technology along with introducing non-fullerene acceptor materials and ternary blend approach caused this significant boost in the performance of solar cells.

However, for longer than a decade, when researchers were focused on boosting the power conversion efficiency of solar cells, the importance of lifetime and stability issues was overlooked by the organic photovoltaic community. Recently, more studies have been conducted and reported on the lifetime and stability of OSCs, employing different strategies to either understand the degradation mechanisms or enhance the lifetime of solar cells.

In this presentation, we overview how the ternary blend approach was developed to boost the power conversion efficiency. Moreover, we discuss how this approach can also address the stability issues related to the mostly used electron transport layer of zinc oxide and significantly increase the photostability of organic solar cells. And finally, we explain how zinc oxide must be manufactured and pretreated to avoid UV light activation, and in parallel, increase the thermal stability of the devices.