journal article·2024-04-03

Unveiling the Impact of Light-Induced Acceptor-Generated ROS on Device Stability in Organic Photovoltaics

Chao Yang, Sheng-Yu Shi, Jie Zhang, Lianke Wang, Zhi-Peng Yu, Hongping Zhou

ACS Applied Materials & Interfaces· Volume 16· Issue 13
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Abstract

The intrinsic stability of the acceptor is a crucial component of the photovoltaic device stability. In this study, we investigated the efficiency and stability of the nonfused-ring acceptors LC8 and BC8 under indoor light conditions. Interestingly, we found that devices based on BC8 with terminal side chains exhibited a higher indoor efficiency and stability. Through accelerated aging experiments, we discovered that the acceptors generate singlet oxygen under light exposure with BC8 demonstrating lower levels of ROS compared to LC8. We attribute this difference to the modulation of the acceptor aggregation orientation. Furthermore, the generated reactive oxygen species (ROS) further deteriorate the acceptor structure, and this phenomenon is also observed in high-efficiency acceptor structures, such as Y6. Our research reveals important mechanisms of acceptor photo-oxidation processes, providing a theoretical basis for enhancing the intrinsic stability of acceptors.
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Research context

OpenAlex topics: Organic Electronics and Photovoltaics · Conducting polymers and applications · Organic Light-Emitting Diodes Research

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

Affiliations

Institute of Material Science and Information Technology, College of Chemistry and Chemical Engineering Anhui University and Key Laboratory of Functional Inorganic Mate-rials Chemistry of Anhui Province, Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, Key Laboratory of Structure and Functional Regulation of Hybrid Materials, (Anhui University) Ministry of Education, Hefei 230601, P. R. China

School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu 241000, P. R. China

Funding

Anhui University · Program for Changjiang Scholars and Innovative Research Team in University · National Natural Science Foundation of China · Key Laboratory of Photovoltaic and Energy Conservation Materials, Chinese Academy of Sciences · Academician Workstation of Anhui University · Center of Free Electron Laser & High Magnetic Field, Anhui University

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