Design Flexibility of Ultra-High Efficiency 4-Junction Inverted Metamorphic Solar Cells

Ryan M. France; John F. Geisz; Ivan Garcia; Myles A. Steiner; William E. McMahon; Daniel J. Friedman; Tom E. Moriarty; Carl Osterwald; J. Scott Ward; Anna Duda; Michelle Young; Waldo J. Olavarria

doi:10.1109/PVSC.2015.7356439

Design Flexibility of Ultra-High Efficiency 4-Junction Inverted Metamorphic Solar Cells

Ryan M. France
, John F. Geisz
, Ivan Garcia
, Myles A. Steiner
, William E. McMahon
, Daniel J. Friedman
, Tom E. Moriarty
, Carl Osterwald
, J. Scott Ward
, Anna Duda
, Michelle Young
, Waldo J. Olavarria

Chemistry and Nanoscience

National Renewable Energy Laboratory
Technical University of Madrid

Research output: Contribution to conference › Paper › peer-review

21 Scopus Citations

Abstract

We present recent improvements to the 4-junction inverted metamorphic solar cell. The device now includes a (Ga)InAsP buffer that transitions to lattice constants greater than InP, which allows access to GaInAs subcells with bandgaps < 0.74 eV and an additional 2 mA/cm2 of bottom junction photocurrent at AM1.5D. However, the optimal design depends on the spectrum and operating temperature. We show how the device flexibility can be used to fine-tune the design for various spectra in order to maximize energy yield for a given operating condition. 1-sun devices achieve 35.3% efficiency under the AM0 spectrum and 37.8% efficiency under the global spectrum at 25°C. Concentrator devices achieve 45.7% peak efficiency under 234x the direct spectrum and maintain over 45% efficiency at 700x at 25°C. Other device improvements include a 4-layer anti-reflection coating with low power loss, and reduced series resistance.

Original language	American English
Number of pages	3
DOIs	https://doi.org/10.1109/PVSC.2015.7356439 https://doi.org/10.1109/PVSC.2015.7356439
State	Published - 14 Dec 2015
Event	42nd IEEE Photovoltaic Specialist Conference, PVSC 2015 - New Orleans, United States Duration: 14 Jun 2015 → 19 Jun 2015

Conference

Conference	42nd IEEE Photovoltaic Specialist Conference, PVSC 2015
Country/Territory	United States
City	New Orleans
Period	14/06/15 → 19/06/15

Bibliographical note

Extended version published in the IEEE Journal of Photovoltaics: see NREL/JA-5J00-66093

NLR Publication Number

NREL/CP-5J00-63574

Keywords

4-junction solar cells
inverted metamorphic multijunction

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France, R. M., Geisz, J. F., Garcia, I., Steiner, M. A., McMahon, W. E., Friedman, D. J., Moriarty, T. E., Osterwald, C., Ward, J. S., Duda, A., Young, M., & Olavarria, W. J. (2015). Design Flexibility of Ultra-High Efficiency 4-Junction Inverted Metamorphic Solar Cells. Paper presented at 42nd IEEE Photovoltaic Specialist Conference, PVSC 2015, New Orleans, United States. https://doi.org/10.1109/PVSC.2015.7356439, https://doi.org/10.1109/PVSC.2015.7356439

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title = "Design Flexibility of Ultra-High Efficiency 4-Junction Inverted Metamorphic Solar Cells",

abstract = "We present recent improvements to the 4-junction inverted metamorphic solar cell. The device now includes a (Ga)InAsP buffer that transitions to lattice constants greater than InP, which allows access to GaInAs subcells with bandgaps < 0.74 eV and an additional 2 mA/cm2 of bottom junction photocurrent at AM1.5D. However, the optimal design depends on the spectrum and operating temperature. We show how the device flexibility can be used to fine-tune the design for various spectra in order to maximize energy yield for a given operating condition. 1-sun devices achieve 35.3\% efficiency under the AM0 spectrum and 37.8\% efficiency under the global spectrum at 25°C. Concentrator devices achieve 45.7\% peak efficiency under 234x the direct spectrum and maintain over 45\% efficiency at 700x at 25°C. Other device improvements include a 4-layer anti-reflection coating with low power loss, and reduced series resistance.",

keywords = "4-junction solar cells, inverted metamorphic multijunction",

author = "France, \{Ryan M.\} and Geisz, \{John F.\} and Ivan Garcia and Steiner, \{Myles A.\} and McMahon, \{William E.\} and Friedman, \{Daniel J.\} and Moriarty, \{Tom E.\} and Carl Osterwald and Ward, \{J. Scott\} and Anna Duda and Michelle Young and Olavarria, \{Waldo J.\}",

note = "Extended version published in the IEEE Journal of Photovoltaics: see NREL/JA-5J00-66093; 42nd IEEE Photovoltaic Specialist Conference, PVSC 2015 ; Conference date: 14-06-2015 Through 19-06-2015",

year = "2015",

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day = "14",

doi = "10.1109/PVSC.2015.7356439",

language = "American English",

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France, RM , Geisz, JF, Garcia, I, Steiner, MA, McMahon, WE, Friedman, DJ, Moriarty, TE, Osterwald, C, Ward, JS, Duda, A, Young, M & Olavarria, WJ 2015, 'Design Flexibility of Ultra-High Efficiency 4-Junction Inverted Metamorphic Solar Cells', Paper presented at 42nd IEEE Photovoltaic Specialist Conference, PVSC 2015, New Orleans, United States, 14/06/15 - 19/06/15. https://doi.org/10.1109/PVSC.2015.7356439, https://doi.org/10.1109/PVSC.2015.7356439

TY - CONF

T1 - Design Flexibility of Ultra-High Efficiency 4-Junction Inverted Metamorphic Solar Cells

AU - France, Ryan M.

AU - Geisz, John F.

AU - Garcia, Ivan

AU - Steiner, Myles A.

AU - McMahon, William E.

AU - Friedman, Daniel J.

AU - Moriarty, Tom E.

AU - Osterwald, Carl

AU - Ward, J. Scott

AU - Duda, Anna

AU - Young, Michelle

AU - Olavarria, Waldo J.

N1 - Extended version published in the IEEE Journal of Photovoltaics: see NREL/JA-5J00-66093

PY - 2015/12/14

Y1 - 2015/12/14

N2 - We present recent improvements to the 4-junction inverted metamorphic solar cell. The device now includes a (Ga)InAsP buffer that transitions to lattice constants greater than InP, which allows access to GaInAs subcells with bandgaps < 0.74 eV and an additional 2 mA/cm2 of bottom junction photocurrent at AM1.5D. However, the optimal design depends on the spectrum and operating temperature. We show how the device flexibility can be used to fine-tune the design for various spectra in order to maximize energy yield for a given operating condition. 1-sun devices achieve 35.3% efficiency under the AM0 spectrum and 37.8% efficiency under the global spectrum at 25°C. Concentrator devices achieve 45.7% peak efficiency under 234x the direct spectrum and maintain over 45% efficiency at 700x at 25°C. Other device improvements include a 4-layer anti-reflection coating with low power loss, and reduced series resistance.

AB - We present recent improvements to the 4-junction inverted metamorphic solar cell. The device now includes a (Ga)InAsP buffer that transitions to lattice constants greater than InP, which allows access to GaInAs subcells with bandgaps < 0.74 eV and an additional 2 mA/cm2 of bottom junction photocurrent at AM1.5D. However, the optimal design depends on the spectrum and operating temperature. We show how the device flexibility can be used to fine-tune the design for various spectra in order to maximize energy yield for a given operating condition. 1-sun devices achieve 35.3% efficiency under the AM0 spectrum and 37.8% efficiency under the global spectrum at 25°C. Concentrator devices achieve 45.7% peak efficiency under 234x the direct spectrum and maintain over 45% efficiency at 700x at 25°C. Other device improvements include a 4-layer anti-reflection coating with low power loss, and reduced series resistance.

KW - 4-junction solar cells

KW - inverted metamorphic multijunction

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DO - 10.1109/PVSC.2015.7356439

M3 - Paper

AN - SCOPUS:84961644234

T2 - 42nd IEEE Photovoltaic Specialist Conference, PVSC 2015

Y2 - 14 June 2015 through 19 June 2015

ER -

Design Flexibility of Ultra-High Efficiency 4-Junction Inverted Metamorphic Solar Cells

Abstract

Conference

Bibliographical note

NLR Publication Number

Keywords

Access to Document

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