Preparation and Characterization of Thin-Film Solar Cells with Ag/C₆₀/MAPbI₃/CZTSe/Mo/FTO Multilayered Structures

Area of Science:

• Materials Science
• Renewable Energy
• Solid-State Physics

Background:

• Advancements in thin-film solar cells are crucial for renewable energy.
• Perovskite solar cells offer high potential due to their tunable properties.
• Developing efficient charge transport layers is key to enhancing solar cell performance.

Purpose of the Study:

• To fabricate and investigate novel solar cells with Ag/C60/MAPbI3/Cu2ZnSnSe4 (CZTSe)/Mo/FTO multilayered structures.
• To optimize the performance of CZTSe hole-transport layers through varying annealing temperatures and thicknesses.
• To analyze the impact of these optimizations on the overall power-conversion efficiency of the solar cells.

Main Methods:

• Fabrication of multilayered solar cells on glass substrates using magnetic sputtering and spin-coating techniques.
• Deposition of CZTSe hole-transport layers with varied annealing temperatures (300-500 °C) and thicknesses (50-300 nm).
• Characterization of CH3NH3PbI3 (MAPbI3) perovskite films and evaluation of solar cell current density-voltage characteristics.

Main Results:

• Optimized CZTSe annealing at 500 °C and a thickness of 200 nm led to improved MAPbI3 crystalline structure and domain size.
• The optimized solar cell achieved a photo-electronic power-conversion efficiency of 14.2%.
• Key parameters included an open-circuit voltage of 1.07 V, short-circuit current density of 19.69 mA/cm², and fill factor of 67.39%.

Conclusions:

• The Ag/C60/MAPbI3/CZTSe/Mo/FTO multilayered structure demonstrates promising photovoltaic properties.
• Annealing temperature and film thickness are critical parameters for optimizing CZTSe layer performance.
• This study highlights a viable approach for enhancing perovskite solar cell efficiency through careful material engineering.