Measurements of Six-Junction Concentrator Solar Cells

John Geisz; Ryan France; Myles Steiner; Thomas Moriarty; Tao Song

doi:10.1109/PVSC40753.2019.9198953

Measurements of Six-Junction Concentrator Solar Cells

John Geisz, Ryan France, Myles Steiner, Thomas Moriarty, Tao Song

Chemistry and Nanoscience

National Renewable Energy Laboratory

Research output: Contribution to conference › Paper

1 Scopus Citations

Abstract

Accurate measurements of six-junction inverted metamorphic concentrator solar cells under AM1.5 direct spectrum are obtained by adjusting the spectrum of a tunable high-intensity solar simulator with custom mirrors. Isotype reference cells and broadband InGaAs QE calibration cells were developed for accurate measurements. Modeling and varying the illumination show that an unavoidable 15% - 17% overillumination on the sixth junction does not result in significant error of these 6J IMM devices. Spectrally adjusted flash measurements are independently confirmed by NREL's Cell and Module Performance team. Concentration measurements of a 6J IMM solar cell resulted in 47.1 ± 3.2% (absolute) efficiency at 143 suns.

Original language	American English
Number of pages	8
DOIs	https://doi.org/10.1109/PVSC40753.2019.9198953
State	Published - 2020
Event	2019 IEEE 46th Photovoltaic Specialists Conference (PVSC) - Chicago, Illinois Duration: 16 Jun 2019 → 21 Jun 2019

Conference

Conference	2019 IEEE 46th Photovoltaic Specialists Conference (PVSC)
City	Chicago, Illinois
Period	16/06/19 → 21/06/19

NREL Publication Number

NREL/CP-5900-74038

Keywords

inverted metamorphic
six junction
solar cell measurements

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10.1109/PVSC40753.2019.9198953

Cite this

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title = "Measurements of Six-Junction Concentrator Solar Cells",

abstract = "Accurate measurements of six-junction inverted metamorphic concentrator solar cells under AM1.5 direct spectrum are obtained by adjusting the spectrum of a tunable high-intensity solar simulator with custom mirrors. Isotype reference cells and broadband InGaAs QE calibration cells were developed for accurate measurements. Modeling and varying the illumination show that an unavoidable 15% - 17% overillumination on the sixth junction does not result in significant error of these 6J IMM devices. Spectrally adjusted flash measurements are independently confirmed by NREL's Cell and Module Performance team. Concentration measurements of a 6J IMM solar cell resulted in 47.1 ± 3.2% (absolute) efficiency at 143 suns.",

keywords = "inverted metamorphic, six junction, solar cell measurements",

author = "John Geisz and Ryan France and Myles Steiner and Thomas Moriarty and Tao Song",

year = "2020",

doi = "10.1109/PVSC40753.2019.9198953",

language = "American English",

note = "2019 IEEE 46th Photovoltaic Specialists Conference (PVSC) ; Conference date: 16-06-2019 Through 21-06-2019",

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TY - CONF

T1 - Measurements of Six-Junction Concentrator Solar Cells

AU - Geisz, John

AU - France, Ryan

AU - Steiner, Myles

AU - Moriarty, Thomas

AU - Song, Tao

PY - 2020

Y1 - 2020

N2 - Accurate measurements of six-junction inverted metamorphic concentrator solar cells under AM1.5 direct spectrum are obtained by adjusting the spectrum of a tunable high-intensity solar simulator with custom mirrors. Isotype reference cells and broadband InGaAs QE calibration cells were developed for accurate measurements. Modeling and varying the illumination show that an unavoidable 15% - 17% overillumination on the sixth junction does not result in significant error of these 6J IMM devices. Spectrally adjusted flash measurements are independently confirmed by NREL's Cell and Module Performance team. Concentration measurements of a 6J IMM solar cell resulted in 47.1 ± 3.2% (absolute) efficiency at 143 suns.

AB - Accurate measurements of six-junction inverted metamorphic concentrator solar cells under AM1.5 direct spectrum are obtained by adjusting the spectrum of a tunable high-intensity solar simulator with custom mirrors. Isotype reference cells and broadband InGaAs QE calibration cells were developed for accurate measurements. Modeling and varying the illumination show that an unavoidable 15% - 17% overillumination on the sixth junction does not result in significant error of these 6J IMM devices. Spectrally adjusted flash measurements are independently confirmed by NREL's Cell and Module Performance team. Concentration measurements of a 6J IMM solar cell resulted in 47.1 ± 3.2% (absolute) efficiency at 143 suns.

KW - inverted metamorphic

KW - six junction

KW - solar cell measurements

U2 - 10.1109/PVSC40753.2019.9198953

DO - 10.1109/PVSC40753.2019.9198953

M3 - Paper

T2 - 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC)

Y2 - 16 June 2019 through 21 June 2019

ER -

Measurements of Six-Junction Concentrator Solar Cells

Abstract

Conference

NREL Publication Number

Keywords

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