Measurement setup for differential spectral responsivity of solar cells

Petri Kärhä; Hans Baumgartner; Janne Askola; Kasperi Kylmänen; Benjamin Oksanen; Kinza Maham; Vo Huynh; Erkki Ikonen

doi:10.1007/s10043-020-00584-x

Measurement setup for differential spectral responsivity of solar cells

Petri Kärhä (Corresponding Author), Hans Baumgartner, Janne Askola, Kasperi Kylmänen, Benjamin Oksanen, Kinza Maham, Vo Huynh, Erkki Ikonen

BA66 National metrology institute VTT MIKES

Research output: Contribution to journal › Article › Scientific › peer-review

1 Citation (Scopus)

Abstract

We have developed a setup for measuring differential spectral responsivities of unifacial and bifacial solar cells under bias light conditions. The setup uses 30 high-brightness LEDs for generating a quasi-monochromatic light source covering the wavelength range 290–1300 nm. Halogen lamps are used to generate bias-lighting conditions up to the irradiance level of 1000 W/m². The setup has been fully characterized for spectral irradiances and spatial uniformities of all light sources. Validation measurements carried out using a reference cell of 2 × 2 cm² area from Fraunhofer ISE demonstrated an agreement better than 2% over the wavelength range of 425–940 nm, with an expanded uncertainty of 2.6%. In the UV and IR regions, the discrepancies are higher but still within estimated uncertainties. The setup is also tested in measuring spectral responsivities of large 15 × 15 cm² bifacial solar cells. The associated problems are discussed.

Original language	English
Pages (from-to)	195-204
Journal	Optical Review
Volume	27
Issue number	2
DOIs	https://doi.org/10.1007/s10043-020-00584-x
Publication status	Published - 1 Apr 2020
MoE publication type	A1 Journal article-refereed
Event	13th Japan-Finland Joint Symposium on Optics in Engineering, OIE 2019 - Tallinn, Estonia Duration: 26 Aug 2019 → 30 Aug 2019

Keywords

Bifacial
Efficacy
Electricity
Radiometry
Solar cell
Spectral responsivity

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10.1007/s10043-020-00584-x

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title = "Measurement setup for differential spectral responsivity of solar cells",

abstract = "We have developed a setup for measuring differential spectral responsivities of unifacial and bifacial solar cells under bias light conditions. The setup uses 30 high-brightness LEDs for generating a quasi-monochromatic light source covering the wavelength range 290–1300 nm. Halogen lamps are used to generate bias-lighting conditions up to the irradiance level of 1000 W/m2. The setup has been fully characterized for spectral irradiances and spatial uniformities of all light sources. Validation measurements carried out using a reference cell of 2 × 2 cm2 area from Fraunhofer ISE demonstrated an agreement better than 2% over the wavelength range of 425–940 nm, with an expanded uncertainty of 2.6%. In the UV and IR regions, the discrepancies are higher but still within estimated uncertainties. The setup is also tested in measuring spectral responsivities of large 15 × 15 cm2 bifacial solar cells. The associated problems are discussed.",

keywords = "Bifacial, Efficacy, Electricity, Radiometry, Solar cell, Spectral responsivity",

author = "Petri K{\"a}rh{\"a} and Hans Baumgartner and Janne Askola and Kasperi Kylm{\"a}nen and Benjamin Oksanen and Kinza Maham and Vo Huynh and Erkki Ikonen",

note = "Funding Information: Open access funding provided by Aalto University. This work has received funding from project 16ENG02 PV-Enerate of the EMPIR programme co-financed by the Participating States and from the European Union{\textquoteright}s Horizon 2020 research and innovation programme. Funding Information: Open access funding provided by Aalto University. This work has received funding from project 16ENG02 PV-Enerate of the EMPIR programme co-financed by the Participating States and from the European Union?s Horizon 2020 research and innovation programme. Publisher Copyright: {\textcopyright} 2020, The Author(s). Copyright: Copyright 2020 Elsevier B.V., All rights reserved.; 13th Japan-Finland Joint Symposium on Optics in Engineering, OIE 2019, OIE 2019 ; Conference date: 26-08-2019 Through 30-08-2019",

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doi = "10.1007/s10043-020-00584-x",

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AU - Kärhä, Petri

AU - Baumgartner, Hans

AU - Askola, Janne

AU - Kylmänen, Kasperi

AU - Oksanen, Benjamin

AU - Maham, Kinza

AU - Huynh, Vo

AU - Ikonen, Erkki

N1 - Funding Information: Open access funding provided by Aalto University. This work has received funding from project 16ENG02 PV-Enerate of the EMPIR programme co-financed by the Participating States and from the European Union’s Horizon 2020 research and innovation programme. Funding Information: Open access funding provided by Aalto University. This work has received funding from project 16ENG02 PV-Enerate of the EMPIR programme co-financed by the Participating States and from the European Union?s Horizon 2020 research and innovation programme. Publisher Copyright: © 2020, The Author(s). Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

PY - 2020/4/1

Y1 - 2020/4/1

N2 - We have developed a setup for measuring differential spectral responsivities of unifacial and bifacial solar cells under bias light conditions. The setup uses 30 high-brightness LEDs for generating a quasi-monochromatic light source covering the wavelength range 290–1300 nm. Halogen lamps are used to generate bias-lighting conditions up to the irradiance level of 1000 W/m2. The setup has been fully characterized for spectral irradiances and spatial uniformities of all light sources. Validation measurements carried out using a reference cell of 2 × 2 cm2 area from Fraunhofer ISE demonstrated an agreement better than 2% over the wavelength range of 425–940 nm, with an expanded uncertainty of 2.6%. In the UV and IR regions, the discrepancies are higher but still within estimated uncertainties. The setup is also tested in measuring spectral responsivities of large 15 × 15 cm2 bifacial solar cells. The associated problems are discussed.

AB - We have developed a setup for measuring differential spectral responsivities of unifacial and bifacial solar cells under bias light conditions. The setup uses 30 high-brightness LEDs for generating a quasi-monochromatic light source covering the wavelength range 290–1300 nm. Halogen lamps are used to generate bias-lighting conditions up to the irradiance level of 1000 W/m2. The setup has been fully characterized for spectral irradiances and spatial uniformities of all light sources. Validation measurements carried out using a reference cell of 2 × 2 cm2 area from Fraunhofer ISE demonstrated an agreement better than 2% over the wavelength range of 425–940 nm, with an expanded uncertainty of 2.6%. In the UV and IR regions, the discrepancies are higher but still within estimated uncertainties. The setup is also tested in measuring spectral responsivities of large 15 × 15 cm2 bifacial solar cells. The associated problems are discussed.

KW - Bifacial

KW - Efficacy

KW - Electricity

KW - Radiometry

KW - Solar cell

KW - Spectral responsivity

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T2 - 13th Japan-Finland Joint Symposium on Optics in Engineering, OIE 2019

Y2 - 26 August 2019 through 30 August 2019

ER -

Measurement setup for differential spectral responsivity of solar cells

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