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Developing High Performance GaP/Si Heterojunction Solar Cells
Published on: November 16, 2018
High-efficiency GaAs and GaInP solar cells grown by all solid-state molecular-beam-epitaxy.
1Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou Industrial Park, Ruoshui Road 398, Suzhou, China. sllu2008@sinano.ac.cn.
Nanoscale Research Letters
|November 2, 2011
Summary
High-efficiency Gallium Arsenide (GaAs) and Gallium Indium Phosphide (GaInP) solar cells were grown using the solid-state molecular-beam-epitaxy (MBE) technique. These results show MBE-grown III-V compound semiconductor solar cells rival traditional methods.
Area of Science:
- Materials Science
- Solid-State Physics
- Renewable Energy
Background:
- III-V compound semiconductors are crucial for high-performance solar cells.
- Molecular-beam-epitaxy (MBE) is a sophisticated crystal growth technique.
- Optimizing III-V solar cell efficiency requires advanced material engineering.
Purpose of the Study:
- To investigate the performance of GaAs and GaInP solar cells grown via solid-state MBE.
- To compare MBE-grown III-V solar cells with those produced by metal-organic-chemical-vapor-deposition (MOCVD).
- To demonstrate the viability of MBE for fabricating high-efficiency phosphide-contained III-V solar cells.
Main Methods:
- Utilizing the all-solid-state molecular-beam-epitaxy (MBE) technique for crystal growth.
- Fabricating single-junction GaAs solar cells with AlInP window layers and GaInP back surface field layers.
- Characterizing the photovoltaic performance of the grown solar cells under standard test conditions (AM1.5G).
Main Results:
- Achieved a photovoltaic conversion efficiency of 26% for a single-junction GaAs solar cell under one sun concentration (AM1.5G).
- Obtained an efficiency of 16.4% for a GaInP solar cell.
- Demonstrated comparable performance of MBE-grown phosphide-contained III-V solar cells to MOCVD-grown counterparts.
Conclusions:
- Solid-state MBE is a viable technique for producing high-efficiency III-V solar cells.
- MBE-grown GaAs and GaInP solar cells show competitive performance against MOCVD-grown devices.
- This research validates MBE as a promising method for advanced solar cell fabrication.
