@misc{ff9242b818a74f3fb495ce2c62d7a7aa,
title = "High Efficiency Multijunction Devices: Solar Cells, Thermophotovoltaics, LEDs",
abstract = "High-efficiency III-V multijunction solar cells require multiple alloys with optimal bandgaps and excellent material quality. However, many useful alloys are lattice-mismatched to available substrates, and require strain-engineering tricks to enable efficient use. To this extent, we have developed low-dislocation density metamorphic material and optically-thick stress-balanced superlattices, enabling access to a wide variety of III-V alloys. Combined with transparent tunnel junctions, these components allow optimizing multijunction devices for a variety of applications. We have designed multijunction cells for the G173G-terrestrial and AM0-space spectra with record 39.5% and 34.2% efficiency, respectively, and also thermophotovoltaic cells for blackbody spectra that reach over 40% TPV-efficiency. Finally, using these PV components, we demonstrate a multijunction LED with high quantum efficiency.",
keywords = "high-efficiency, III-V, multijunction, multijunction LED, optically-thick stress-balanced superlattices, photovoltaic, PV, solar cell, space, thermophotovoltaic, TPV",
author = "Ryan France",
year = "2023",
language = "American English",
series = "Presented at the SPIE Photonics West Conference, 28 January - 2 February 2023, San Francisco, California",
type = "Other",
}
