High efficiency multijunction devices: solar cells, thermophotovoltaic cells, and LEDs (Conference Presentation)

Ryan M. France

doi:10.1117/12.2655225

10 March 2023 High efficiency multijunction devices: solar cells, thermophotovoltaic cells, and LEDs (Conference Presentation)

Ryan M. France

Author Affiliations +

Proceedings Volume PC12416, Physics, Simulation, and Photonic Engineering of Photovoltaic Devices XII; PC1241607 (2023) https://doi.org/10.1117/12.2655225
Event: SPIE OPTO, 2023, San Francisco, California, United States

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.

Conference Presentation

Citation Download Citation

Ryan M. France "High efficiency multijunction devices: solar cells, thermophotovoltaic cells, and LEDs (Conference Presentation)", Proc. SPIE PC12416, Physics, Simulation, and Photonic Engineering of Photovoltaic Devices XII, PC1241607 (10 March 2023); https://doi.org/10.1117/12.2655225

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