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Vol. 15 (2023)

Green-Solvent Processed Blade-Coating Organic Solar Cells with an Efficiency Approaching 19% Enabled by Alkyl-Tailored Acceptors

https://doi.org/10.1007/s40820-023-01208-0
Hairui Bai
State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, People’s Republic of China
Ruijie Ma
Department of Electronic and Information Engineering, Research Institute for Smart Energy (RISE), The Hong Kong Polytechnic University, Kowloon 999077, Hong Kong, People’s Republic of China
Wenyan Su
School of Materials Science and Engineering, Xi’an University of Science and Technology, Xi’an 710054, People’s Republic of China
Top Archie Dela Peña
Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon 999077, Hong Kong, People’s Republic of China
Tengfei Li
State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, People’s Republic of China
Lingxiao Tang
State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, People’s Republic of China
Jie Yang
School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, People’s Republic of China
Bin Hu
Frontier Institute of Science and Technology, Xi’an Jiaotong University, Xi’an 710054, People’s Republic of China
Yilin Wang
State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, People’s Republic of China
Zhaozhao Bi
State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, People’s Republic of China
Yueling Su
Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an 710119, People’s Republic of China
Qi Wei
Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon 999077, Hong Kong, People’s Republic of China
Qiang Wu
State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, People’s Republic of China
Yuwei Duan
Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an 710119, People’s Republic of China
Yuxiang Li
School of Materials Science and Engineering, Xi’an University of Science and Technology, Xi’an 710054, People’s Republic of China
Jiaying Wu
Advanced Materials Thrust, Function Hub, The Hong Kong University of Science and Technology, Nansha, Guangzhou, People’s Republic of China
Zicheng Ding
Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an 710119, People’s Republic of China
Xunfan Liao
Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education/National Engineering Research Center for Carbohydrate Synthesis, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang 330022, People’s Republic of China
Yinjuan Huang
State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, People’s Republic of China
Chao Gao
Xi’an Key Laboratory of Liquid Crystal and Organic Photovoltaic Materials, State Key Laboratory of Fluorine & Nitrogen Chemicals, Xi’an Modern Chemistry Research Institute, Xi’an 710065, People’s Republic of China
Guanghao Lu
Frontier Institute of Science and Technology, Xi’an Jiaotong University, Xi’an 710054, People’s Republic of China
Mingjie Li
Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon 999077, Hong Kong, People’s Republic of China
Weiguo Zhu
Jiangsu Engineering Research Center of Light‑Electricity‑Heat Energy‑Converting Materials and Applications, School of Materials Science and Engineering, Changzhou University, Changzhou 213164, People’s Republic of China
Gang Li
Department of Electronic and Information Engineering, Research Institute for Smart Energy (RISE), The Hong Kong Polytechnic University, Kowloon 999077, Hong Kong, People’s Republic of China
Qunping Fan
State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, People’s Republic of China
Wei Ma
State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, People’s Republic of China

Corresponding Author: Wei Ma

msewma@xjtu.edu.cn

Nano-Micro Letters, Vol. 15 (2023), Article Number: 241

Abstract

Power-conversion-efficiencies (PCEs) of organic solar cells (OSCs) in laboratory, normally processed by spin-coating technology with toxic halogenated solvents, have reached over 19%. However, there is usually a marked PCE drop when the blade-coating and/or green-solvents toward large-scale printing are used instead, which hampers the practical development of OSCs. Here, a new series of N-alkyl-tailored small molecule acceptors named YR-SeNF with a same molecular main backbone are developed by combining selenium-fused central-core and naphthalene-fused end-group. Thanks to the N-alkyl engineering, NIR-absorbing YR-SeNF series show different crystallinity, packing patterns, and miscibility with polymeric donor. The studies exhibit that the molecular packing, crystallinity, and vertical distribution of active layer morphologies are well optimized by introducing newly designed guest acceptor associated with tailored N-alkyl chains, providing the improved charge transfer dynamics and stability for the PM6:L8-BO:YR-SeNF-based OSCs. As a result, a record-high PCE approaching 19% is achieved in the blade-coating OSCs fabricated from a green-solvent o-xylene with high-boiling point. Notably, ternary OSCs offer robust operating stability under maximum-power-point tracking and well-keep > 80% of the initial PCEs for even over 400 h. Our alkyl-tailored guest acceptor strategy provides a unique approach to develop green-solvent and blade-coating processed high-efficiency and operating stable OSCs, which paves a way for industrial development.


Highlights:
1 Alkyl-tailored Y-SMAs named YR-SeNF series with near-infrared absorption, different molecular crystallinity and self-assembly abilities are developed.
2 The related organic solar cells (OSCs) with an active layer processed from halogen-free solvents and spin-coating-free technologies achieve a ~ 19% efficiency.
3 Ternary OSCs offer a robust operating stability under MPP tracking and well-keep > 80% of the initial efficiency for even over 400 h.

Keywords

Alkyl-tailored guest acceptors Blade-coating Green solvent processing Stability Organic solar cells
Bai, Hairui, Ruijie Ma, Wenyan Su, Top Archie Dela Peña, Tengfei Li, Lingxiao Tang, Jie Yang, Bin Hu, Yilin Wang, Zhaozhao Bi, Yueling Su, Qi Wei, Qiang Wu, Yuwei Duan, Yuxiang Li, Jiaying Wu, Zicheng Ding, Xunfan Liao, Yinjuan Huang, Chao Gao, Guanghao Lu, Mingjie Li, Weiguo Zhu, Gang Li, Qunping Fan, and Wei Ma. 2023. “Green-Solvent Processed Blade-Coating Organic Solar Cells With an Efficiency Approaching 19% Enabled by Alkyl-Tailored Acceptors”. Nano-Micro Letters 15 (November):241. https://doi.org/10.1007/s40820-023-01208-0.
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