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IV measurements of mc-Si solar cells: comparison of results from institute and industry partners within the EU CrystalClear project
Hahn, G.; Herguth, A.; Helfricht, A.; Hofmann, M.; Warta, W.; Borg, N.J.C.M. van der; Weeber, A.W.; John, J.; Beaucarne, G. ; Bagus, S.; Nagel, H.; Quang, N. Le; Nichiporuk, O.; Vincueria, I.
Gepubliceerd door: Publicatie datum:
ECN Zonne-energie 10-10-2008
ECN publicatienummer: Publicatie type:
ECN-M--08-068 Conferentiebijdrage
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Gepresenteerd op: 23rd European Photovoltaic Solar Energy Conference and Exhibition, Valencia, Spain, 1-5 september 2008.

Determination of solar cell parameters by illuminated IV measurement is a standard characterisation technique used by many partners active in photovoltaics. The aim of this work is to carry out a cross check of different measurement set-ups used by different research partners of the EU CrystalClear project using industrialtype multicrystalline Si solar cells. In a first round robin a significant spread of all cell parameters (Voc, jsc, FF and efficiency) could be observed. After distribution of sister cells to selected cells calibrated at ISE CalLab, a second round robin was carried out. The spread in FF and jsc could be significantly reduced. Repeatability tests showed that by using a photo diode fluctuations of light intensity can be minimised and variations in jsc can be decreased down to 0.2 mA/cm2. Remaining systematic errors are control of cell temperature, contacting geometry, and use of appropriate reference cells.

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