Efficient Integrated Perovskite/Organic Solar Cells via Interdigitated Interfacial Charge Transfer

Area of Science:

• Materials Science
• Renewable Energy
• Photovoltaics

Background:

• Integrated perovskite/organic solar cells (IPOSCs) offer enhanced power conversion efficiency (PCE) by broadening spectral response.
• Optimizing perovskite crystallinity and organic bulk heterojunction (BHJ) morphology is key for IPOSC performance.
• Efficient charge transfer at the perovskite/BHJ interface is critical for successful IPOSC operation.

Purpose of the Study:

• To develop efficient IPOSCs with enhanced PCE.
• To investigate the impact of interdigitated interfaces on charge transfer.
• To optimize BHJ nanomorphology for improved device performance.

Main Methods:

• Fabrication of P-I-N-type IPOSCs with interdigitated perovskite and BHJ layers.
• Utilizing large microscale perovskite grains to facilitate BHJ infiltration into grain boundaries.
• Characterization of device performance, including PCE, short-circuit current (Jsc), open-circuit voltage (Voc), and fill factor (FF).

Main Results:

• Achieved an excellent PCE of 18.43% in the developed P-I-N-type IPOSC.
• Reported a Jsc of 24.44 mA/cm², a Voc of 0.95 V, and a FF of 79.49%.
• Demonstrated that interdigitated interfaces and optimized BHJ nanomorphology synergistically enhance device performance.

Conclusions:

• Interdigitated interfaces between perovskite and BHJ layers significantly promote efficient charge transfer.
• Large perovskite grains enhance BHJ infiltration, increasing interfacial area and charge transfer efficiency.
• The developed IPOSCs represent highly efficient hybrid perovskite-polymer solar cells.