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

    Research output: Contribution to journalArticleScientificpeer-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 languageEnglish
    Pages (from-to)195-204
    JournalOptical Review
    Volume27
    Issue number2
    DOIs
    Publication statusPublished - 1 Apr 2020
    MoE publication typeA1 Journal article-refereed
    Event13th Japan-Finland Joint Symposium on Optics in Engineering, OIE 2019 - Tallinn, Estonia
    Duration: 26 Aug 201930 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

    Fingerprint

    Dive into the research topics of 'Measurement setup for differential spectral responsivity of solar cells'. Together they form a unique fingerprint.

    Cite this