Related Experiment Video
Updated: Sep 14, 2025
In situ Grazing Incidence Small Angle X-ray Scattering on Roll-To-Roll Coating of Organic Solar Cells with Laboratory X-ray Instrumentation
Published on: March 2, 2021
Organic solar cells with 21% efficiency enabled by a hybrid interfacial layer with dual-component synergy
Congqi Li1, Yunhao Cai2, Pengfei Hu3,4
1College of Materials Science and Opto-Electronic Technology Center of Materials Science and Optoelectronics Engineering CAS Center for Excellence in Topological Quantum Computation CAS Key Laboratory of Vacuum Physics, University of Chinese Academy of Sciences, Beijing, China.
A novel hybrid cathode interfacial layer (AZnO-F3N) enhances organic solar cell performance by improving conductivity and film uniformity. This breakthrough boosts power conversion efficiencies to over 21% and shows promise for flexible devices.
Area of Science:
- Materials Science
- Organic Electronics
- Photovoltaics
Background:
- The cathode interfacial layer (CIL) is crucial for electron extraction and recombination in organic solar cells (OSCs).
- Current CILs face limitations in conductivity, recombination, and morphology, hindering OSC efficiency and stability.
Purpose of the Study:
- To develop a novel inorganic-organic hybrid CIL (AZnO-F3N) to overcome the limitations of existing CILs.
- To investigate the synergistic effects of a dual-component strategy integrating amorphous zinc oxide and PNDIT-F3N.
Main Methods:
- Fabrication of an inorganic-organic hybrid CIL (AZnO-F3N) using a dual-component synergy strategy.
- Integration of the AZnO-F3N CIL into organic solar cell devices with D18:L8-BO and ternary active layers.
- Characterization of device performance, including power conversion efficiency, charge extraction, and recombination dynamics.
Main Results:
- The AZnO-F3N CIL demonstrated reduced interfacial defects, enhanced conductivity, and improved film uniformity.
- OSCs with the AZnO-F3N CIL exhibited more efficient charge extraction and transport, with reduced recombination.
- A binary OSC achieved a power conversion efficiency of 20.6%, and a ternary device reached 21.0% (certified 20.8%).
Conclusions:
- The AZnO-F3N CIL significantly enhances OSC performance by optimizing interfacial properties.
- The hybrid CIL shows versatility across different active layers, thick-film configurations, and flexible devices.
- This advanced CIL holds great potential for the future development of high-efficiency and stable organic solar cells.
