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A 3D-printed Chamber for Organic Optoelectronic Device Degradation Testing
Published on: August 10, 2018
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Unveiling the Impact of Light-Induced Acceptor-Generated ROS on Device Stability in Organic Photovoltaics
Chao Yang1, Sheng-Yu Shi2, Jie Zhang1
1Institute 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.
ACS Applied Materials & Interfaces
|March 21, 2024
Summary
Nonfused-ring acceptors like BC8 show improved stability and efficiency in indoor photovoltaic devices. This is due to reduced reactive oxygen species (ROS) generation, enhancing acceptor longevity.
Area of Science:
- Materials Science
- Photovoltaics
- Organic Electronics
Background:
- The stability of photovoltaic devices is critically dependent on the intrinsic stability of the acceptor material.
- Nonfused-ring acceptors are essential components in modern photovoltaic technologies.
Purpose of the Study:
- To investigate the efficiency and stability of nonfused-ring acceptors (LC8 and BC8) under indoor light conditions.
- To understand the mechanisms behind acceptor degradation and identify strategies for improving stability.
Main Methods:
- Fabrication and testing of photovoltaic devices utilizing LC8 and BC8 acceptors.
- Accelerated aging experiments to assess device stability under light exposure.
- Analysis of reactive oxygen species (ROS) generation and its correlation with acceptor structure and aggregation.
Main Results:
- Devices based on BC8 acceptors demonstrated superior indoor efficiency and stability compared to LC8.
- Accelerated aging revealed that acceptors generate singlet oxygen under light, with BC8 exhibiting lower ROS levels.
- Reactive oxygen species (ROS) were found to degrade acceptor structures, a phenomenon also observed in high-efficiency acceptors like Y6.
Conclusions:
- The terminal side chains in BC8 modulate acceptor aggregation, leading to reduced ROS generation and enhanced intrinsic stability.
- Understanding photo-oxidation mechanisms is crucial for designing more stable and efficient organic photovoltaic acceptors.
- This research provides a theoretical foundation for improving the long-term performance of photovoltaic devices.
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