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 |
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Pages (from-to) | 195-204 |
Journal | Optical Review |
Volume | 27 |
Issue number | 2 |
DOIs | |
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