Efficient Semitransparent Organic Solar Cells Enabled by Ag Grid Electrodes and Optical Coupling Layers.

Area of Science:

• Materials Science
• Renewable Energy Technologies
• Organic Electronics

Background:

• Semitransparent organic solar cells (ST-OSCs) are crucial for building-integrated photovoltaics.
• Achieving a balance between high power conversion efficiency (PCE) and average visible transmittance (AVT) is a key challenge for ST-OSCs.
• Optimized device architecture is essential for enhancing the performance of ST-OSCs.

Purpose of the Study:

• To develop novel ST-OSCs with high PCE and AVT for building-integrated renewable energy applications.
• To investigate the impact of optimized active and optical coupling layers on ST-OSC performance.
• To enhance the light utilization efficiency (LUE) of ST-OSCs.

Main Methods:

• Fabrication of Ag grid bottom electrodes using photolithography.
• Optimization of the active layer using PM6 and Y6 blend.
• Integration of alternating optical coupling layers (CBP and LiF).

Main Results:

• Achieved a PCE of 10.65% and AVT of 22.78% with optimized PM6:Y6 active layer.
• Increased AVT to 27.61% and PCE to 10.87% by incorporating alternating CBP and LiF optical coupling layers.
• Demonstrated that integrated optimization of active and optical coupling layers significantly improves LUE.

Conclusions:

• The developed ST-OSCs exhibit a promising balance between PCE and AVT.
• Integrated optimization of active and optical coupling layers is an effective strategy to enhance ST-OSC performance and LUE.
• These findings hold significant importance for the practical application of ST-OSCs in building-integrated photovoltaics.