Multijunction solar cells with graded buffer Bragg reflectors

France, Ryan Matthew; Geisz, John Franz; Espinet-Gonzalez, Pilar

Multijunction solar cells with graded buffer Bragg reflectors

Patent · Mon Dec 20 23:00:00 EST 2021

OSTI ID:1860187

France, Ryan Matthew; Geisz, John Franz; Espinet-Gonzalez, Pilar

Distributed Bragg reflectors are incorporated into the compositionally graded buffers of metamorphic solar cells, adding functionality to the buffer without adding cost. The reflection aids in collection in subcells that are optically thin due to low diffusion length, high bulk recombination, radiation hardness, partially-absorbing quantum structures, or simply for cost savings. Performance enhancements are demonstrated in GaAs subcells with QWs, which is beneficial when GaAs is not the ideal bandgap.

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Research Organization:: National Renewable Energy Laboratory (NREL), Golden, CO (United States); California Institute of Technology, Pasadena, CA (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: AC36-08GO28308

Assignee:: Alliance for Sustainable Energy, LLC (Golden, CO); California Institute of Technology (Pasadena, CA)

Patent Number(s):: 11,205,734

Application Number:: 16/283,375

OSTI ID:: 1860187

Country of Publication:: United States

Language:: English

References (18)

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