Title:	Method for Evaluating the Severity of Solar Cell Cracks in Electroluminescence Images
Author(s):	S.V. Spataru, G.A. dos Reis Benatto, T.K. Hass, A.A. Santamaria Lancia, P.B. Poulsen, S. Thorsteinsson
Keywords:	Electroluminescence, Characterisation, Characterization, Photovoltaic Module, Quantitative Analysis, Severity
Topic:	Photovoltaic Modules and BoS Components
Subtopic:	PV Module Design, Manufacture, Performance and Reliability
Event:	37th European Photovoltaic Solar Energy Conference and Exhibition
Session:	4AV.2.31
Pages:	1130 - 1135
ISBN:	3-936338-73-6
Paper DOI:	10.4229/EUPVSEC20202020-4AV.2.31
Price:	0,00 EUR
Document(s):	paper, poster

Abstract/Summary:

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The severity of solar cell cracks is most often evaluated qualitatively, by assigning them to one of several categories. In this work we propose a machine analysis friendly metric for evaluating the severity of solar cell cracks from electroluminescence (EL) images. The metric is derived from the EL intensity versus camera sensor exposure time characteristic of the active solar cell regions, relative to that of non-radiative regions of the EL image. Thereafter an image segmentation method is used to determine the area and position of cracks above a certain severity level.