DataVXACS Energy LettersPaper
journal article·2022-07-08

Non-Fullerene Acceptor Doped Block Copolymer for Efficient and Stable Organic Solar Cells

Yue Wu, Qunping Fan, Baobing Fan, Feng Qi, Ziang Wu, Francis R. Lin, Yang Li, Chun-Sing Lee, Han Young Woo, Hin-Lap Yip, Alex K.-Y. Jen

ACS Energy Letters· Volume 7· Issue 7
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Source abstract

Abstract

Bulk-heterojunction organic solar cells (OSCs) often suffer from morphological instability due to thermo- or photoinduced molecular diffusion. To circumvent such instability, OSCs incorporating a single-component block copolymer with covalently bonded blocks can restrain molecular diffusion. However, the device efficiencies of such block copolymers are lagging behind those based on a blended active layer due to a nonideal morphological problem. Herein, we successfully alleviate this problem by introducing a small-molecule additive, Y6, having a structure similar to that of the acceptor block. The addition of Y6 improves the packing of acceptor blocks in the block copolymer, PM6-b-PYIT. This helps improve electron transport and enhances the device efficiency to 15.55%, representing the highest value reported for block-copolymer-based OSCs. Moreover, the device stability is significantly improved due to the padding of Y6 into the nanovoids of the copolymer matrix to restrict the molecular motion. This work presents an effective strategy to address the efficiency–stability tradeoff in OSCs.
Source: openalex_inverted_index · Quality: baseline

Research context

Nanomaterials

OpenAlex topics: Organic Electronics and Photovoltaics · Conducting polymers and applications · Perovskite Materials and Applications

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

Affiliations

Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong 999077, People’s Republic of China

Hong Kong Institute for Clean Energy, City University of Hong Kong, Hong Kong 999077, People’s Republic of China

Department of Chemistry, City University of Hong Kong, Hong Kong 999077, People’s Republic of China

Department of Chemistry, Korea University, Seoul 136-713, Korea

Center of Super-Diamond and Advanced Films, City University of Hong Kong, Hong Kong 999077, People’s Republic of China

School of Energy and Environment, City University of Hong Kong, Hong Kong 999077, People’s Republic of China

Department of Materials Science and Engineering, University of Washington, Seattle, Washington 98195-2120, United States

Funding

Research Grants Council, University Grants Committee · Office of Naval Research · Innovation and Technology Commission · City University of Hong Kong · Guangdong-Hong Kong-Macao Joint Laboratory of Optoelectronic and Magnetic Functional Materials · Guangdong Major Project of Basic and Applied Basic Research

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