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16.55% efficiency ternary organic solar cells enabled by incorporating a small molecular donor

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Abstract

The introduction of a third component into the binary system to construct a ternary architecture is widely applied to improve the power conversion efficiency (PCE) of organic solar cells (OSCs). Herein, a small molecule donor, SM1, was introduced into the PM6:Y6 binary system where a high PCE of up to 16.55% was achieved after the addition of 15 wt% of SM1 in the donors with an open-circuit voltage (Voc) of 0.831 V, a short-circuit current density (Jsc) of 25.7 mA cm−2, and a fill factor (FF) of 77.5%, which was much higher than that of the PM6:Y6 binary systems (15.75%), presenting a Voc of 0.845 V, a Jsc of 25.3 mA cm−2, and a FF of 73.7%. The introduction of SM1 improved the charge extraction, exciton dissociation, and blend of the morphology while effectively reducing bimolecular recombination. As a result, the Jsc and FF of the ternary devices greatly improved. This study presents an effective method to improve the PCE by adopting a ternary strategy, while at the same time, promoting a simple fabrication technology.

Graphical abstract: 16.55% efficiency ternary organic solar cells enabled by incorporating a small molecular donor

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Publication details

The article was received on 14 Sep 2019, accepted on 15 Oct 2019 and first published on 15 Oct 2019


Article type: Paper
DOI: 10.1039/C9TA10145D
J. Mater. Chem. A, 2019, Advance Article

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    16.55% efficiency ternary organic solar cells enabled by incorporating a small molecular donor

    T. Yan, J. Ge, T. Lei, W. Zhang, W. Song, B. Fanady, D. Zhang, S. Chen, R. Peng and Z. Ge, J. Mater. Chem. A, 2019, Advance Article , DOI: 10.1039/C9TA10145D

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