Broadband absorption enhancement achieved by optical layer mediated plasmonic solar cell

Area of Science:

• Materials Science
• Renewable Energy
• Optoelectronics

Background:

• Organic solar cells offer a low-cost alternative for renewable energy.
• Improving the efficiency of thin-film organic solar cells remains a key challenge.
• Plasmonic nanostructures can enhance light absorption in solar cells.

Purpose of the Study:

• To propose and investigate a novel thin solar cell design for enhanced performance.
• To integrate plasmonic components with an optical layer in organic solar cells.
• To understand the mechanisms behind performance improvements.

Main Methods:

• Finite-difference time-domain (FDTD) calculations were used for theoretical investigation.
• Systematic analysis of plasmonic nanoparticles (NPs) array and optical layer effects.
• Evaluation of spectral performance and short-circuit current density (Jsc) enhancement.

Main Results:

• Achieved a significant short-circuit current density (Jsc) enhancement up to 67%.
• Demonstrated a broad geometric parametric range for over 50% Jsc enhancement.
• Identified synergistic effects between localized surface plasmon resonance (LSPR) and optical interference.

Conclusions:

• The proposed design offers a versatile approach to enhance organic thin-film solar cell performance.
• The integration of plasmonic NPs and an optical layer is effective for broadband absorption enhancement.
• This design concept can be extended to other thin-film solar cell systems.