Recent Advances in Interface Engineering for Planar Heterojunction Perovskite Solar Cells

Area of Science:

• Materials Science
• Renewable Energy
• Photovoltaics

Background:

• Organic-inorganic hybrid perovskite solar cells are promising next-generation photovoltaics.
• High power conversion efficiencies (PCEs) exceeding 20% have been achieved.
• Perovskites' ambipolar semiconducting properties enable planar heterojunction (PHJ) solar cells.

Purpose of the Study:

• To review recent advancements in interfacial engineering for PHJ perovskite solar cells.
• To focus on molecular interfacial materials and supporting layers.
• To discuss challenges and future directions in perovskite solar cell research.

Main Methods:

• Review of recent scientific literature on interfacial engineering in PHJ perovskite solar cells.
• Systematic review of supporting interfacial layers for perovskite film optimization.
• Analysis of molecular interfacial materials impacting device performance and stability.

Main Results:

• Interfacial layers enhance exciton separation, charge transport, and collection.
• Supporting layers influence energy-level alignment and perovskite film morphology.
• Interfacial engineering significantly impacts device performance and stability.

Conclusions:

• Interfacial engineering is critical for advancing PHJ perovskite solar cell technology.
• Molecular interfacial materials and optimized supporting layers are key to improving PCE and stability.
• Further research is needed to address remaining challenges in perovskite solar cell development.