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Proceedings Paper

High through-put outdoor characterization of silicon photovoltaic modules by moving electroluminescence measurements
Author(s): Bernd Doll; Tobias Pickel; Oliver Schreer; Cornelia Zetzmann; Janine Teubner; Claudia Buerhop; Jens Hauch; Christian Camus; Christoph J. Brabec
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Paper Abstract

Fast and non-destructive quality control tools are important to assess the reliability of photovoltaic plants. On-site inspection is essential to minimize the risk of module damage and electrical yield losses. This may only be achieved by using highly sensitive imaging techniques such as luminescence or infrared thermography imaging. Nowadays, electroluminescence is used to detect defects such as local cell changes, series resistances and shunts in solar cells and modules which can cause electrical losses. However, the drawback of this method is the relatively low measurement throughput. To increase the throughput InGaAs cameras with a resolution of 640 × 512 pixels are used, for which low integration times are possible to acquire electroluminescence images. For such low integration times even moving image acquisition and movie recording are feasible to detect the mentioned defects. In this paper, an outdoor electroluminescence setup is presented for mobile handheld recording. Experiments showed that 5 ms integration time is a good compromise between low contrasts for lower integration times and motion blurring for higher integration times. The camera prototype has an onboard computer to avoid image transmission losses. It was controlled and visualized over Wi-Fi and remote desktop connection. The energy supply was provided from LiPo-batteries for improved mobility. In comparison to conventional electroluminescence measurements we can decrease the measurement time of a 20 module string from 5 min to 20 s.

Paper Details

Date Published: 18 September 2018
PDF: 11 pages
Proc. SPIE 10766, Infrared Sensors, Devices, and Applications VIII, 107660K (18 September 2018); doi: 10.1117/12.2320518
Show Author Affiliations
Bernd Doll, Bavarian Ctr. for Applied Energy Research (Germany)
Graduate School in Advanced Optical Technologies (Germany)
Friedrich-Alexander-Univ. Erlangen-Nürnberg (Germany)
Tobias Pickel, Bavarian Ctr. for Applied Energy Research (Germany)
Oliver Schreer, IRCAM GmbH (Germany)
Cornelia Zetzmann, Rauschert Heinersdorf-Pressig GmbH (Germany)
Janine Teubner, Bavarian Ctr. for Applied Energy Research (Germany)
Claudia Buerhop, Bavarian Ctr. for Applied Energy Research (Germany)
Jens Hauch, Bavarian Ctr. for Applied Energy Research (Germany)
Christian Camus, Bavarian Ctr. for Applied Energy Research (Germany)
Friedrich-Alexander-Univ. Erlangen-Nürnberg (Germany)
Christoph J. Brabec, Bavarian Ctr. for Applied Energy Research (Germany)
Friedrich-Alexander-Univ. Erlangen-Nürnberg (Germany)


Published in SPIE Proceedings Vol. 10766:
Infrared Sensors, Devices, and Applications VIII
Paul D. LeVan; Priyalal Wijewarnasuriya; Arvind I. D'Souza, Editor(s)

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