Performance of Perovskite Solar Cell Using Compact Layer by Sputter Deposition

Area of Science:

• Materials Science
• Photovoltaics
• Nanotechnology

Background:

• High-efficiency perovskite solar cells (PSCs) require a uniform compact layer to block direct contact between the FTO substrate and the perovskite layer.
• This layer is crucial for suppressing electron recombination and facilitating electron collection.
• Defects at the FTO/perovskite interface can significantly hinder device performance.

Purpose of the Study:

• To investigate the impact of sputtered titanium dioxide (TiO₂) compact layers on the performance of PSCs.
• To compare the properties of sputtered TiO₂ layers with those prepared via spin coating.
• To optimize the deposition time of sputtered TiO₂ for enhanced device efficiency.

Main Methods:

• Fabrication of PSCs using sputtered TiO₂ compact layers with varying deposition times.
• Characterization of the structure, morphology, and electrical properties of TiO₂ layers.
• Comparison of sputtered TiO₂ films against spin-coated TiO₂ films.

Main Results:

• Sputtered TiO₂ compact layers exhibited a very smooth surface morphology.
• The sputtered TiO₂ layer effectively inhibited electron recombination at the FTO interface.
• Devices utilizing sputtered TiO₂ showed higher open-circuit voltage and short-circuit current density.
• A maximum photoelectric conversion efficiency of 13.37% was achieved with a 30-minute TiO₂ deposition time.

Conclusions:

• Sputtering is a viable method for creating smooth TiO₂ compact layers for PSCs.
• Optimized sputtered TiO₂ layers significantly enhance PSC performance by reducing recombination.
• The 30-minute sputtered TiO₂ compact layer represents a promising advancement for high-efficiency PSCs.