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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.

Inventors:
; ;
Issue Date:
Research Org.:
National Renewable Energy Laboratory (NREL), Golden, CO (United States); California Institute of Technology (CalTech), Pasadena, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1860187
Patent Number(s):
11205734
Application Number:
16/283,375
Assignee:
Alliance for Sustainable Energy, LLC (Golden, CO); California Institute of Technology (Pasadena, CA)
Patent Classifications (CPCs):
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01L - SEMICONDUCTOR DEVICES
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01S - DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT
DOE Contract Number:  
AC36-08GO28308
Resource Type:
Patent
Resource Relation:
Patent File Date: 02/22/2019
Country of Publication:
United States
Language:
English

Citation Formats

France, Ryan Matthew, Geisz, John Franz, and Espinet-Gonzalez, Pilar. Multijunction solar cells with graded buffer Bragg reflectors. United States: N. p., 2021. Web.
France, Ryan Matthew, Geisz, John Franz, & Espinet-Gonzalez, Pilar. Multijunction solar cells with graded buffer Bragg reflectors. United States.
France, Ryan Matthew, Geisz, John Franz, and Espinet-Gonzalez, Pilar. Tue . "Multijunction solar cells with graded buffer Bragg reflectors". United States. https://www.osti.gov/servlets/purl/1860187.
@article{osti_1860187,
title = {Multijunction solar cells with graded buffer Bragg reflectors},
author = {France, Ryan Matthew and Geisz, John Franz and Espinet-Gonzalez, Pilar},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2021},
month = {12}
}

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