Luminescent solar concentrator efficiency versus edge solar cell coverage.

Area of Science:

• Materials Science
• Renewable Energy
• Optics

Background:

• Large-area luminescent solar concentrators (LSCs) offer potential for efficient solar energy capture.
• Accurate modeling of waveguiding efficiency is crucial for optimizing LSC performance.
• Existing models may not fully capture the behavior of large-area devices with varied configurations.

Purpose of the Study:

• To introduce a novel analytical approach for estimating the waveguiding efficiency of large-area LSCs.
• To provide a physically relevant model applicable across a wide range of optical and geometrical parameters.
• To validate the model through experimental fabrication and measurement.

Main Methods:

• Development of an analytical model for waveguiding efficiency in rectangular LSCs.
• Inclusion of parameters such as absorption, scattering, size, and edge configurations (mirrors, solar cells).
• Fabrication and experimental verification of a silicon quantum dot-based LSC (19 × 19 cm²).

Main Results:

• The analytical model accurately predicts the waveguiding efficiency of LSCs within experimental error.
• A critical LSC size (N/α) was determined, beyond which device inactivity occurs.
• The model demonstrates applicability to LSCs with varying numbers of attached solar cells and material absorption coefficients.

Conclusions:

• The developed model serves as a straightforward tool for analyzing the waveguiding efficiency of large-area LSCs.
• The findings are relevant for designing LSCs with high concentration ratios and for glazing applications.
• The study validates the theoretical predictions with experimental data, confirming the model's reliability.