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^*, Hans Baumgartner, Janne Askola, Kasperi Kylmänen, Benjamin Oksanen, Kinza Maham, Vo Huynh, Erkki Ikonen

^*Corresponding author for this work

Aalto University

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

11 Citations (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

Funding

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.

Keywords

Bifacial
Efficacy
Electricity
Radiometry
Solar cell
Spectral responsivity

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1007/s10043-020-00584-x

Cite this

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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.",

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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

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

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ER -

Measurement setup for differential spectral responsivity of solar cells

Abstract

Funding

Keywords

UN SDGs

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