Статья

Self‐Assembled Molecules with Asymmetric Backbone for Highly Stable Binary Organic Solar Cells with 19.7 % Efficiency

Xueliang YuCollege of Electronic Information and Optical Engineering, Ministry of Education Key Laboratory of Interface Science and Engineering in Advanced Materials Taiyuan University of Technology Taiyuan 030024 ChinaPengfei DingCenter of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing 100049 ChinaDaobin YangCenter of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing 100049 ChinaPengyu YanZhejiang Engineering Research Center for Energy Optoelectronic Materials and Devices, Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201 ChinaHongqiang WangZhejiang Engineering Research Center for Energy Optoelectronic Materials and Devices, Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201 ChinaShuncheng YangZhejiang Engineering Research Center for Energy Optoelectronic Materials and Devices, Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201 ChinaJie WuZhejiang Engineering Research Center for Energy Optoelectronic Materials and Devices, Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201 ChinaZhongqiang WangCollege of Electronic Information and Optical Engineering, Ministry of Education Key Laboratory of Interface Science and Engineering in Advanced Materials Taiyuan University of Technology Taiyuan 030024 ChinaHe SunInnovation Center for Organic Electronics (INOEL) Yamagata University Yonezawa 992-0119 JapanZhenyu ChenCenter of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing 100049 ChinaLin XieZhejiang Engineering Research Center for Energy Optoelectronic Materials and Devices, Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201 ChinaZiyi GeCenter of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing 100049 China

2024en

ABI

Аннотация

Abstract The hole‐transporting material (HTM), poly (3,4‐ethylene dioxythiophene) poly(styrene sulfonate) (PEDOT : PSS), is the most widely used material in the realization of high‐efficiency organic solar cells (OSCs). However, the stability of PEDOT : PSS‐based OSCs is quite poor, arising from its strong acidity and hygroscopicity. In addition, PEDOT : PSS has an absorption in the infrared region and high highest occupied molecular orbital (HOMO) energy level, thus limiting the enhancement of short‐circuit current density ( J sc ) and open‐circuit voltage ( V oc ), respectively. Herein, two asymmetric self‐assembled molecules (SAMs), namely BrCz and BrBACz, were designed and synthesized as HTM in binary OSCs based on the well‐known system of PM6 : Y6, PM6 : eC9, PM6 : L8‐BO, and D18 : eC9. Compared with BrCz, BrBACz shows larger dipole moment, deeper work function and lower surface energy. Moreover, BrBACz not only enhances photon harvesting in the active layer, but also minimizes voltage losses as well as improves interface charge extraction/ transport. Consequently, the PM6 : eC9‐based binary OSC using BrBACz as HTM exhibits a champion efficiency of 19.70 % with a remarkable J sc of 29.20 mA cm −2 and a V oc of 0.856 V, which is a record efficiency for binary OSCs so far. In addition, the unencapsulated device maintains 95.0 % of its original efficiency after 1,000 hours of storage at air ambient, indicating excellent long‐term stability.

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Идентификаторы

DOI: 10.1002/anie.202401518

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Показатели — AkademScholar