High-Efficiency Crystalline Silicon-Based Solar Cells Using Textured TiO₂ Layer and Plasmonic Nanoparticles

Area of Science:

• Materials Science
• Renewable Energy
• Nanotechnology

Background:

• Crystalline silicon solar cells are dominant but face efficiency limitations.
• Enhancing light absorption and charge carrier collection is crucial for higher performance.
• Textured surfaces and plasmonic structures offer pathways to improve solar cell efficiency.

Purpose of the Study:

• To design and simulate a high-efficiency crystalline silicon solar cell.
• To optimize structural parameters for enhanced light absorption and performance.
• To investigate the impact of textured TiO2, grating back reflectors, and plasmonic nanoparticles on solar cell efficiency.

Main Methods:

• Finite Difference Time Domain (FDTD) method for optical and electrical simulations.
• Optimization of crystalline silicon layer thickness and back reflector grating dimensions.
• Simulation of textured TiO2 layer height and plasmonic nanoparticle integration (Au, Ag, Al, Cu).

Main Results:

• Achieved a short circuit current density of 61.9 mA/cm², open-circuit voltage of 0.6 V, fill factor of 0.83, and power conversion efficiency of 30.6%.
• Significant improvements in short circuit current density (89%) and power conversion efficiency (34%) compared to baseline.
• Optimized grating period, height, width, and TiO2 layer height were determined for maximum efficiency.

Conclusions:

• The proposed crystalline silicon solar cell design demonstrates significantly enhanced performance.
• Integration of textured TiO2, graphene-coated gratings, and plasmonic nanoparticles is effective for boosting efficiency.
• The study provides a pathway for developing next-generation high-efficiency solar cells.