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Seminario: III-V PV R&D at the National Renewable Energy Laboratory (NREL)



Lugar:
Instituto de Energía Solar sala 114
Fecha y Hora:
Fecha de Inicio: 20 abril 2018
Hora de Inicio: 11:30
Hora de Finalización: 13:30

Organizador:
Instituto de Energía Solar
Descripción:

III-V PV R&D at the National Renewable Energy Laboratory (NREL)
Presented by John F. Geisz and Myles Steiner
Instituto de Energía Solar – Sala 114  11:30 a.m., April 20, 2018

NREL is targeting R&D strategies to make III-V PV economically relevant to the terrestrial PV market at large scale. We have developed six-junction inverted metamorphic (6J IMM) concentrator solar cells with a clear path to achieving 50% efficiency for high concentration photovoltaic (HCPV) systems.  We are growing high-efficiency III-V solar cells at rates over 180 microns/hour by Hydride Vapor Phase Epitaxy (HVPE) to reduce flat-plate costs. Using HVPE, we have demonstrated over 25% efficient GaAs solar cells as well as the world’s first two-junction tandem devices. We have mechanically stacked transparent, high efficiency GaInP and GaAs junctions, as well as GaInP/GaAs tandems, onto silicon solar cells to achieve over 32% and 35% efficient silicon-based multijunction solar cells. We are also investigating direct growth of III-V onto patterned silicon substrates to develop silicon tandems that maintain the high performance of the silicon junction.




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