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IV-Measurements of Bifacial Solar Cells in an Inline Solar Simulator with Double-Sided Illumination

: Krieg, A.; Greulich, J.; Ramspeck, K.; Dzafic, D.; Wöhrle, N.; Rauer, M.; Rein, S.

Fulltext urn:nbn:de:0011-n-5486207 (447 KByte PDF)
MD5 Fingerprint: 4d89549fe139a77f56f4deec2584cf91
Created on: 18.6.2019

Verlinden, P. ; WIP - Renewable Energies, München:
35th European Photovoltaic Solar Energy Conference and Exhibition 2018 : Proceedings of the international conference held in Brussels, Belgium, 24 September-28 September 2018; DVD-ROM
München: WIP, 2018
ISBN: 978-3-936338-50-8
ISBN: 3-936338-50-7
European Photovoltaic Solar Energy Conference and Exhibition (EU PVSEC) <35, 2018, Brussels>
Conference Paper, Electronic Publication
Fraunhofer ISE ()
Inline-Solarzellenanalytik und Simulation; Photovoltaik; Silicium-Photovoltaik; Messtechnik und Produktionskontrolle; bifacial; characterization; IV-measurement

Bifacial solar cells allow higher output power densities due to double-sided power generation compared to monofacial cells. An important step is the accurate measurement of the current-voltage (IV) characteristics of the cells under realistic conditions. The most accurate option to measure a bifacial solar cell is to illuminate the cells simultaneously from both sides. A new method for irradiance and short-circuit current correction for bifacial solar cells suitable for inline measurements in mass production is presented, where the crosstalk during a single-sided measurement and deviations of the ratio of the nominal to the measured irradiance at double-sided illumination measurements will be corrected by taking the bifaciality coefficient into account. This reduces typical measurement errors for the short-circuit current Isc below 0.1%. The simple approach, adding the front and the rear side irradiance directly to calculate the bifacial irradiance, shows Isc errors of more than 0.5% in typical measuring conditions and should not be used when the solar cell is double-sided illuminated.