Critical Progress in Quasi-Planar Heterojunction Organic Solar Cells with Efficiency Over 18

Area of Science:

• Materials Science
• Renewable Energy
• Organic Electronics

Background:

• Organic solar cells (OSCs) are a promising renewable energy technology.
• Quasi-planar heterojunction (QPHJ) architecture offers unique advantages for OSCs.
• Device engineering is crucial for optimizing OSC performance.

Purpose of the Study:

• To review recent advancements in QPHJ-OSCs from a device engineering perspective.
• To elucidate the theoretical underpinnings of high-efficiency QPHJ-OSCs.
• To discuss strategies for overcoming key challenges in QPHJ-OSC development.

Main Methods:

• Summarizing recent progress in QPHJ-OSC device engineering.
• Introducing foundational theory for QPHJ-OSC efficiency factors.
• Detailing innovative approaches for material and device optimization.
• Reviewing advancements in semitransparent QPHJ-OSCs.

Main Results:

• QPHJ-OSCs demonstrate high efficiency due to optimized device engineering.
• Strategies for regulating intermolecular penetration, exciton utilization, and charge transport are effective.
• Semitransparent QPHJ-OSCs achieve high power conversion efficiency (PCE) and average visible transmittance (AVT).

Conclusions:

• The QPHJ architecture presents significant potential for future OSC advancements.
• Continued materials innovation and device engineering are key to higher PCE and stability in QPHJ-OSCs.
• QPHJ-OSCs are a viable and promising alternative in the field of solar energy conversion.