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Title: Building a Six-Junction Inverted Metamorphic Concentrator Solar Cell

Abstract

We propose practical six-junction (6J) inverted metamorphic multijunction (IMM) concentrator solar cell designs with the potential to exceed 50% efficiency using moderately high quality junction materials. We demonstrate the top three junctions and their monolithic integration lattice matched to GaAs using 2.1-eV AlGaInP, 1.7-eV AlGaAs or GaInAsP, and 1.4-eV GaAs with external radiative efficiencies >0.1%. We demonstrate tunnel junctions with peak tunneling current >400 A/cm2 that are transparent to <2.1-eV light. We compare the bottom three GaInAs(p) junctions with bandgaps of 1.2, 1.0, and 0.7 eV grown on InP and transparent metamorphic grades with low dislocation densities. The solution to an integration challenge resulting from Zn diffusion in the GaAs junction is illustrated in a five-junction IMM. Excellent 1-sun performance is demonstrated in a complete 6J IMM device with VOC = 5.15 V, and a promising pathway toward >50% efficiency at high concentrations is presented.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1];  [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]
  1. National Renewable Energy Lab. (NREL), Golden, CO (United States)
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office
OSTI Identifier:
1417798
Report Number(s):
NREL/JA-5J00-68675
Journal ID: ISSN 2156-3381
Grant/Contract Number:  
AC36-08GO28308
Resource Type:
Accepted Manuscript
Journal Name:
IEEE Journal of Photovoltaics
Additional Journal Information:
Journal Volume: 8; Journal Issue: 2; Journal ID: ISSN 2156-3381
Publisher:
IEEE
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; inverted metamorphic multijunction photovoltaics; concentrator solar cells; III-V semiconductor alloys

Citation Formats

Geisz, John F., Steiner, Myles A., Jain, Nikhil, Schulte, Kevin L., France, Ryan M., McMahon, William E., Perl, Emmett E., and Friedman, Daniel J.. Building a Six-Junction Inverted Metamorphic Concentrator Solar Cell. United States: N. p., 2017. Web. https://doi.org/10.1109/JPHOTOV.2017.2778567.
Geisz, John F., Steiner, Myles A., Jain, Nikhil, Schulte, Kevin L., France, Ryan M., McMahon, William E., Perl, Emmett E., & Friedman, Daniel J.. Building a Six-Junction Inverted Metamorphic Concentrator Solar Cell. United States. https://doi.org/10.1109/JPHOTOV.2017.2778567
Geisz, John F., Steiner, Myles A., Jain, Nikhil, Schulte, Kevin L., France, Ryan M., McMahon, William E., Perl, Emmett E., and Friedman, Daniel J.. Wed . "Building a Six-Junction Inverted Metamorphic Concentrator Solar Cell". United States. https://doi.org/10.1109/JPHOTOV.2017.2778567. https://www.osti.gov/servlets/purl/1417798.
@article{osti_1417798,
title = {Building a Six-Junction Inverted Metamorphic Concentrator Solar Cell},
author = {Geisz, John F. and Steiner, Myles A. and Jain, Nikhil and Schulte, Kevin L. and France, Ryan M. and McMahon, William E. and Perl, Emmett E. and Friedman, Daniel J.},
abstractNote = {We propose practical six-junction (6J) inverted metamorphic multijunction (IMM) concentrator solar cell designs with the potential to exceed 50% efficiency using moderately high quality junction materials. We demonstrate the top three junctions and their monolithic integration lattice matched to GaAs using 2.1-eV AlGaInP, 1.7-eV AlGaAs or GaInAsP, and 1.4-eV GaAs with external radiative efficiencies >0.1%. We demonstrate tunnel junctions with peak tunneling current >400 A/cm2 that are transparent to <2.1-eV light. We compare the bottom three GaInAs(p) junctions with bandgaps of 1.2, 1.0, and 0.7 eV grown on InP and transparent metamorphic grades with low dislocation densities. The solution to an integration challenge resulting from Zn diffusion in the GaAs junction is illustrated in a five-junction IMM. Excellent 1-sun performance is demonstrated in a complete 6J IMM device with VOC = 5.15 V, and a promising pathway toward >50% efficiency at high concentrations is presented.},
doi = {10.1109/JPHOTOV.2017.2778567},
journal = {IEEE Journal of Photovoltaics},
number = 2,
volume = 8,
place = {United States},
year = {2017},
month = {12}
}

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Cited by: 33 works
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Figures / Tables:

Fig. 1 Fig. 1: Schematic for 6J design strategies. The second junction in any of these designs could also be composed of the 1.7eV quaternary Ga.7In.3As.3P.7

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Works referencing / citing this record:

Printed assemblies of microscale triple‐junction inverted metamorphic GaInP/GaAs/InGaAs solar cells
journal, March 2019

  • Gai, Boju; Geisz, John F.; Friedman, Daniel J.
  • Progress in Photovoltaics: Research and Applications, Vol. 27, Issue 6
  • DOI: 10.1002/pip.3127

Solar cell efficiency tables (version 54)
journal, June 2019

  • Green, Martin A.; Dunlop, Ewan D.; Levi, Dean H.
  • Progress in Photovoltaics: Research and Applications, Vol. 27, Issue 7
  • DOI: 10.1002/pip.3171

Solar cell efficiency tables (Version 55)
journal, December 2019

  • Green, Martin A.; Dunlop, Ewan D.; Hohl‐Ebinger, Jochen
  • Progress in Photovoltaics: Research and Applications, Vol. 28, Issue 1
  • DOI: 10.1002/pip.3228

Growth of InGaAs Solar Cells on InP(001) Miscut Substrates Using Solid‐Source Molecular Beam Epitaxy
journal, September 2019

  • Oshima, Ryuji; Ishitsuka, Yuki; Okano, Yoshinobu
  • physica status solidi (a), Vol. 217, Issue 3
  • DOI: 10.1002/pssa.201900512

Six-junction concentrator solar cells
conference, January 2018

  • Geisz, John F.; Steiner, Myles A.; Schulte, Kevin L.
  • 14TH INTERNATIONAL CONFERENCE ON CONCENTRATOR PHOTOVOLTAIC SYSTEMS (CPV-14), AIP Conference Proceedings
  • DOI: 10.1063/1.5053512

Simulating the Performance of Al 0.3 Ga 0.7 As/InP/Ge Multijunction Solar Cells under Variation of Spectral Irradiance and Temperature
journal, February 2019

  • Sumaryada, Tony; Rohaeni, Siti; Damayanti, Nurlia Eka
  • Modelling and Simulation in Engineering, Vol. 2019
  • DOI: 10.1155/2019/5090981

Non-Curing Thermal Interface Materials with Graphene Fillers for Thermal Management of Concentrated Photovoltaic Solar Cells
journal, December 2019

  • Mahadevan, Barath Kanna; Naghibi, Sahar; Kargar, Fariborz
  • C — Journal of Carbon Research, Vol. 6, Issue 1
  • DOI: 10.3390/c6010002

    Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.