Using Two Compatible Donor Polymers Boosts the Efficiency of Ternary Organic Solar Cells to 17.7%
Artikel i vetenskaplig tidskrift, 2021

The use of ternary organic semiconducting blends is recognized as an effective strategy to boost the performance of polymer solar cells (PSCs) by increasing the photocurrent while minimizing voltage losses. Yet, the scarcity of suitable donors with a deep highest occupied molecular orbital (HOMO) level poses a challenge in extending this strategy to ternary systems based on two polymers. Here, we address this challenge by the synthesis of a new donor polymer (PM7-Si), which is akin to the well-known PM6 but has a deeper HOMO level. PM7-Si is utilized as the third component to enhance the performance of the best-in-class binary system of PM6:BTP-eC9, leading to simultaneous improvements in the efficiency (17.7%), open-circuit voltage (0.864 V), and fill factor (77.6%). These decisively enhanced features are attributed to the efficient carrier transport, improved stacking order, and morphology. Our results highlight the use of two polymer donors as a promising strategy toward high-performance ternary PSCs.

Författare

Wenhong Peng

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Ergang Wang Group

Changzhou University

Hunan Institute of Engineering

Y. B. Lin

King Abdullah University of Science and Technology (KAUST)

Sang Young Jeong

Korea University

Yuliar Firdaus

Research Center for Population - Indonesian Institute of Sciences

King Abdullah University of Science and Technology (KAUST)

Zewdneh Genene

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Ergang Wang Group

Aggelos Nikitaras

National Technical University of Athens (NTUA)

Leonidas Tsetseris

National Technical University of Athens (NTUA)

Han Young Woo

Korea University

W. G. Zhu

Changzhou University

Thomas D. Anthopoulos

King Abdullah University of Science and Technology (KAUST)

Ergang Wang

Zhengzhou University

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Ergang Wang Group

Chemistry of Materials

0897-4756 (ISSN) 1520-5002 (eISSN)

Vol. In Press

Ämneskategorier

Datorteknik

Polymerkemi

Inbäddad systemteknik

Styrkeområden

Materialvetenskap

DOI

10.1021/acs.chemmater.1c01433

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Senast uppdaterat

2021-10-04