Six-Junction Concentrator Solar Cells

Geisz, John F; Steiner, Myles A; Schulte, Kevin L; Young, Matthew R; France, Ryan M; Friedman, Daniel J

doi:10.1063/1.5053512

Six-Junction Concentrator Solar Cells

Conference · Thu Sep 13 04:00:00 EDT 2018

DOI:https://doi.org/10.1063/1.5053512· OSTI ID:1475512

Geisz, John F ^[1]; ^[1]; Schulte, Kevin L ^[1]; Young, Matthew R ^[1]; ^[1]; ^[1]

National Renewable Energy Laboratory (NREL), Golden, CO (United States)

We report on six-junction inverted metamorphic (6J IMM) solar cells developed for concentrator applications. Monolithic III-V structures are grown by metal organic vapor phase epitaxy with junction bandgaps of 2.06, 1.70, 1.40, 1.16, 0.94, and 0.70 eV. The top three junctions are lattice-matched to the GaAs substrate, but the bottom three junctions use three consecutive metamorphic compositionally graded buffers to transition the lattice constant to GaxIn1-xAs compositions with the previously listed bandgaps. Performance of 6J IMM devices at one-sun AM1.5 Direct conditions gives VOC = 5.301 V, JSC = 8.05 mA/cm2, fill factor=83.9%, and efficiency=35.8%. Promising operation at high concentration is achieved but the spectrum was not controlled to AM1.5D. Tunnel junctions do not limit until at least several hundred suns. High concentration performance appears to be limited by internal heterojunction barriers created by zinc diffusion that decreases the fill factor. The properties of each junction within the 6J IMM have been separately characterized through electroluminescence and luminescent coupling measurements.

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Research Organization:: National Renewable Energy Laboratory (NREL), Golden, CO (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Solar Energy Technologies Office (EE-4S)

DOE Contract Number:: AC36-08GO28308

OSTI ID:: 1475512

Report Number(s):: NREL/CP-5900-71300

Country of Publication:: United States

Language:: English

References (14)

Quadruple-Junction Inverted Metamorphic Concentrator Devices France, Ryan M.; Geisz, John F.; Garcia, Ivan IEEE Journal of Photovoltaics, Vol. 5, Issue 1 https://doi.org/10.1109/JPHOTOV.2014.2364132	journal	January 2015
Pathway to 50% efficient inverted metamorphic concentrator solar cells Geisz, John F.; Steiner, Myles A.; Jain, Nikhil 13TH INTERNATIONAL CONFERENCE ON CONCENTRATOR PHOTOVOLTAIC SYSTEMS (CPV-13), AIP Conference Proceedings https://doi.org/10.1063/1.5001425	conference	January 2017
Design Flexibility of Ultrahigh Efficiency Four-Junction Inverted Metamorphic Solar Cells France, Ryan M.; Geisz, John F.; Garcia, Ivan IEEE Journal of Photovoltaics, Vol. 6, Issue 2 https://doi.org/10.1109/JPHOTOV.2015.2505182	journal	March 2016
Wafer bonded four-junction GaInP/GaAs//GaInAsP/GaInAs concentrator solar cells with 44.7% efficiency: Wafer bonded four-junction concentrator solar cells with 44.7% efficiency Dimroth, Frank; Grave, Matthias; Beutel, Paul Progress in Photovoltaics: Research and Applications, Vol. 22, Issue 3 https://doi.org/10.1002/pip.2475	journal	January 2014
Building a Six-Junction Inverted Metamorphic Concentrator Solar Cell Geisz, John F.; Steiner, Myles A.; Jain, Nikhil IEEE Journal of Photovoltaics, Vol. 8, Issue 2 https://doi.org/10.1109/JPHOTOV.2017.2778567	journal	March 2018
Measuring IV Curves and Subcell Photocurrents in the Presence of Luminescent Coupling Steiner, Myles A.; Geisz, John F.; Moriarty, Tom E. IEEE Journal of Photovoltaics, Vol. 3, Issue 2 https://doi.org/10.1109/JPHOTOV.2012.2228298	journal	April 2013
High-efficiency GaInP∕GaAs∕InGaAs triple-junction solar cells grown inverted with a metamorphic bottom junction Geisz, J. F.; Kurtz, Sarah; Wanlass, M. W. Applied Physics Letters, Vol. 91, Issue 2, Article No. 023502 https://doi.org/10.1063/1.2753729	journal	July 2007
40.8% efficient inverted triple-junction solar cell with two independently metamorphic junctions Geisz, J. F.; Friedman, D. J.; Ward, J. S. Applied Physics Letters, Vol. 93, Issue 12, Article No. 123505 https://doi.org/10.1063/1.2988497	journal	September 2008
Highly Transparent Compositionally Graded Buffers for New Metamorphic Multijunction Solar Cell Designs Schulte, Kevin L.; France, Ryan M.; Geisz, John F. IEEE Journal of Photovoltaics, Vol. 7, Issue 1 https://doi.org/10.1109/JPHOTOV.2016.2619183	journal	January 2017
A comparative study of BSF layers for GaAs-based single-junction or multijunction concentrator solar cells Galiana, Beatriz; Rey-Stolle, Ignacio; Baudrit, Mathieu Semiconductor Science and Technology, Vol. 21, Issue 10 https://doi.org/10.1088/0268-1242/21/10/003	journal	August 2006
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Ordering-enhanced dislocation glide in III-V alloys McMahon, William E.; Kang, Joongoo; France, Ryan M. Journal of Applied Physics, Vol. 114, Issue 20 https://doi.org/10.1063/1.4833244	journal	November 2013
Component integration strategies in metamorphic 4-junction III-V concentrator solar cells García, Iván; Geisz, John F.; France, Ryan M. 3RD INTERNATIONAL CONFERENCE ON THEORETICAL AND APPLIED PHYSICS 2013 (ICTAP 2013), AIP Conference Proceedings https://doi.org/10.1063/1.4897024	conference	January 2014

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