A new approach to high-efficiency multi-band-gap solar cells

Journal Article · Sun Apr 01 00:00:00 EST 1990 · Journal of Applied Physics; (USA)

DOI:https://doi.org/10.1063/1.345339· OSTI ID:6987837

Barnham, K W.J. ^[1]; Duggan, G ^[2]

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1. Blackett Laboratory, Imperial College of Science, Technology Medicine, London SW7 2BZ, United Kingdom (GB)
2. Philips Research Laboratories, Redhill RH1 5HA, United Kingdom (GB)

The advantages of using multi-quantum-well or superlattice systems as the absorbers in concentrator solar cells are discussed. By adjusting the quantum-well width, an effective band-gap variation that covers the high-efficiency region of the solar spectrum can be obtained. Higher efficiencies should result from the ability to optimize separately current and voltage generating factors. Suitable structures to ensure good carrier separation and collection and to obtain higher open-circuit voltages are presented using the (AlGa)As/GaAs/(InGa)As system. Efficiencies above existing single-band-gap limits should be achievable, with upper limits in excess of 40%.

• OSTI ID: 6987837
• Journal Information: Journal of Applied Physics; (USA), Vol. 67:7; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
ALUMINIUM ARSENIDE SOLAR CELLS
EFFICIENCY
GALLIUM ARSENIDE SOLAR CELLS
DESIGN
ENERGY GAP
INDIUM ARSENIDES
OPTICAL PROPERTIES
SUPERLATTICES
ARSENIC COMPOUNDS
ARSENIDES
DIRECT ENERGY CONVERTERS
EQUIPMENT
INDIUM COMPOUNDS
PHOTOELECTRIC CELLS
PHOTOVOLTAIC CELLS
PHYSICAL PROPERTIES
PNICTIDES
SOLAR CELLS
SOLAR EQUIPMENT
140501* - Solar Energy Conversion- Photovoltaic Conversion