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Published on: July 18, 2015
Antireflective coatings for multijunction solar cells under wide-angle ray bundles
Marta Victoria1, César Domínguez, Ignacio Antón
1Instituto de Energía Solar -Universidad Politécnica de Madrid, Ciudad Universitaria, 28040 Madrid, Spain. marta.victoria@ies-def.upm.es
Optimizing antireflection coatings (ARCs) for concentrator solar cells requires considering light angles and spectral bandwidth. Numerical optimization shows potential efficiency gains, though real-world ARCs slightly underperform predictions.
Area of Science:
- Materials Science
- Photovoltaics
- Optical Engineering
Background:
- Optimizing antireflection coatings (ARCs) is crucial for multijunction solar cells in concentrator photovoltaic (CPV) systems.
- Performance is influenced by angular light distribution from concentrators and the broad spectral sensitivity of solar cells.
Purpose of the Study:
- To present a numerical optimization procedure for ARCs in CPV systems.
- To calculate potential efficiency enhancements for various concentrating PV systems.
- To introduce and evaluate methods for direct ARC characterization.
Main Methods:
- Numerical optimization of ARC designs.
- Calculation of efficiency enhancement for different CPV configurations.
- Development and application of two direct ARC characterization techniques.
Main Results:
- The study presents a numerical optimization procedure and its outcomes for ARCs.
- Potential efficiency enhancements were calculated for several concentrating PV systems.
- Direct characterization revealed that actual ARCs exhibit slightly lower performance than theoretically predicted.
Conclusions:
- ARC optimization for CPV systems must account for angular light distribution and spectral bandwidth.
- Numerical optimization offers a pathway to enhance solar cell efficiency.
- Real-world ARC performance may deviate from theoretical models, necessitating accurate characterization.
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