journal article·2021-09-28Open access

Using Two Compatible Donor Polymers Boosts the Efficiency of Ternary Organic Solar Cells to 17.7%

Wenhong Peng, Yuanbao Lin, Sang Young Jeong, Yuliar Firdaus, Zewdneh Genene, Aggelos Nikitaras, Leonidas Tsetseris, Han Young Woo, Weiguo Zhu, Thomas D. Anthopoulos, Ergang Wang

Chemistry of Materials· Volume 33· Issue 18

Abstract

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.
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Research context

OpenAlex topics: Organic Electronics and Photovoltaics · Conducting polymers and applications · Semiconductor materials and interfaces

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

Affiliations

School of Materials Science and Engineering, Jiangsu Engineering Laboratory of Light-Electricity-Heat Energy-Converting Materials and Applications, Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou 213164, China

Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Göteborg SE-412 96, Sweden

Hunan Provincial Key Laboratory of Environmental Catalysis & Waste Re-cycling, School of Materials and Chemical Engineering, Hunan Institute of Engineering, Xiangtan 411104, China

King Abdullah University of Science and Technology (KAUST), KAUST Solar Center (KSC), Thuwal 23955, Saudi Arabia

Department of Chemistry, Korea University, Anam-ro 145, Seoul 02841, Republic of Korea

Research Center for Electronics and Telecommunication, Indonesian Institute of Science, Jalan Sangkuriang Komplek LIPI Building 20 level 4, Bandung 40135, Indonesia

Department of Physics, National Technical University of Athens, Athens GR-15780, Greece

School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China

Funding

Svenska Forskningsr??det Formas · Vetenskapsr??det · State Key Laboratory of Polymer Materials Engineering · National Research Foundation of Korea · King Abdullah University of Science and Technology · Knut och Alice Wallenbergs Stiftelse · Government of Jiangsu Province · China Scholarship Council · National Natural Science Foundation of China · Priority Academic Program Development of Jiangsu Higher Education Institutions · Top-notch Academic Programs Project for Polymeric Materials Science and Engineering · Natural Science Research of Jiangsu Higher Education Institutions

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