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Light trapping transparent electrodes with a wide-angle response.

Mengdi Sun, Pieter G Kik

|October 7, 2021

Summary

This summary is machine-generated.

Transparent electrodes with triangular metallic wire arrays significantly reduce shadowing losses in solar cells. This light trapping technology maintains high efficiency over a wide angular range, improving solar energy capture.

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Area of Science:

Optoelectronics
Materials Science
Renewable Energy

Background:

Transparent electrodes are crucial for solar cells.
Shadowing losses reduce the efficiency of solar energy conversion.
Light trapping techniques aim to minimize these losses.

Purpose of the Study:

To investigate angle-dependent light trapping in transparent electrodes.
To analyze the impact of incident angle on light trapping efficiency (ηLT).
To quantify shadowing loss reduction in silicon solar cells.

Main Methods:

Fabrication of transparent electrodes with triangular metallic wire arrays in a dielectric layer.
Analysis of light trapping via total internal reflection at normal incidence.
Evaluation of angle-dependent transmission and shadowing losses.

Main Results:

Normal incidence illumination achieves light trapping with minimal shadowing losses.
Varying the angle of incidence affects light trapping efficiency due to reduced internal reflection.
Shadowing losses reduced by over 85% for angles up to 120°.
Angle-averaged shadowing losses reduced by over 50% for incident angles between -60° and +60°.

Conclusions:

Judicious selection of geometry and materials enhances light trapping performance.
The developed transparent electrodes significantly reduce shadowing losses across a broad angular range.
This technology offers a substantial improvement for silicon solar cell efficiency under varying illumination conditions.