Zinc Oxide Nanostructures in Photovoltaics: Recent Progress, Technical Challenges and Perspectives

Area of Science:

• Materials Science
• Nanotechnology
• Renewable Energy

Background:

• Zinc oxide (ZnO) is an n-type semiconductor with remarkable electronic and optoelectronic properties.
• ZnO nanostructures exhibit size-dependent characteristics like enhanced surface area and tunable properties.
• ZnO is widely used in photocatalysis, LEDs, sensing, and notably, solar cells.

Purpose of the Study:

• To review the potential applications of ZnO nanostructures in diverse solar cell types.
• To highlight progress, challenges, and applications in emerging solar cell technologies.
• To explore ZnO's role in enhancing photovoltaic performance.

Main Methods:

• Review of existing literature on ZnO nanostructures in solar cells.
• Analysis of ZnO's properties relevant to photovoltaic applications.
• Discussion of hybrid organic-inorganic heterojunctions and emerging solar cell designs.

Main Results:

• ZnO nanostructures serve as effective electron transport and photoactive absorber layers.
• ZnO enhances photovoltaic performance in perovskite, heterojunction, quantum dot, and dye-sensitized solar cells.
• Facile blending of ZnO with organic semiconductors enables hybrid solar cell fabrication.

Conclusions:

• ZnO nanostructures are versatile materials for advancing solar cell technology.
• Their properties facilitate improved charge transport and compatibility in various solar cell architectures.
• Continued research into ZnO nanostructures promises significant progress in emerging solar energy applications.