Achieving High-Performance Ternary Organic Solar Cells through Tuning Acceptor Alloy

Area of Science:

• Organic photovoltaics
• Materials science
• Semiconductor devices

Background:

• Ternary organic solar cells offer potential for enhanced performance.
• Small molecule and fullerene derivatives are common n-type acceptors.

Purpose of the Study:

• To fabricate and optimize ternary solar cells using specific n-type small molecular and fullerene acceptors.
• To evaluate the performance of these ternary devices against binary references.

Main Methods:

• Fabrication of ternary solar cells with one donor and two acceptors.
• Optimization of device architecture and materials.
• Performance characterization including Jsc, VOC, and FF measurements.

Main Results:

• Achieved a highest power conversion efficiency of 10.4% for the optimized ternary device.
• This efficiency represents a record for one donor/two acceptors-based ternary systems.
• Key parameters like short-circuit current density (Jsc), open-circuit voltage (VOC), and fill factor (FF) were improved compared to binary devices.

Conclusions:

• The developed ternary solar cells demonstrate superior performance compared to conventional binary systems.
• The use of specific small molecular and fullerene acceptors in a ternary configuration is a promising strategy for high-efficiency organic photovoltaics.