Multijunction Solar Cells with Graded Buffer Bragg Reflectors

Ryan France; John Geisz; Pilar Espinet-Gonzalez

Multijunction Solar Cells with Graded Buffer Bragg Reflectors

Ryan France (Inventor), John Geisz (Inventor), Pilar Espinet-Gonzalez (Inventor)

Chemistry and Nanoscience

California Institute of Technology

Research output: Patent

Abstract

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.

Original language	American English
Patent number	11,205,734 B2
Filing date	21/12/21
State	Published - 2021

NREL Publication Number

NREL/PT-5900-81761

Keywords

alternating Al4n layers
distributed Bragg reflector (DBR)
inverted metamorphic multijunction (IMM) device
metamorphic layer

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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Cite this

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title = "Multijunction Solar Cells with Graded Buffer Bragg Reflectors",

abstract = "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.",

keywords = "alternating Al4n layers, distributed Bragg reflector (DBR), inverted metamorphic multijunction (IMM) device, metamorphic layer",

author = "Ryan France and John Geisz and Pilar Espinet-Gonzalez",

year = "2021",

language = "American English",

type = "Patent",

note = "11,205,734 B2",

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TY - PAT

T1 - Multijunction Solar Cells with Graded Buffer Bragg Reflectors

AU - France, Ryan

AU - Geisz, John

AU - Espinet-Gonzalez, Pilar

PY - 2021

Y1 - 2021

N2 - 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.

AB - 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.

KW - alternating Al4n layers

KW - distributed Bragg reflector (DBR)

KW - inverted metamorphic multijunction (IMM) device

KW - metamorphic layer

M3 - Patent

M1 - 11,205,734 B2

Y2 - 2021/12/21

ER -

Multijunction Solar Cells with Graded Buffer Bragg Reflectors

Abstract

NREL Publication Number

Keywords

UN SDGs

Access to Document

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Cite this