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Structural analysis of thin film silicon PV modules by means of large area laser beam induced current measurements

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conference contribution
posted on 20.08.2009, 09:08 by Pongpan Vorasayan, Tom BettsTom Betts, Ralph Gottschalg, A.N. Tiwari
The spatial variation of key properties of large area silicon thin film PV modules is investigated using a Laser Beam Induced Current (LBIC) system. The system produces a very detailed current mapping of devices, allowing the identification of spatially varying structural defects of photovoltaic modules. It allows for efficient defect detection as well as investigations of localised performance variation. In this paper, the results are shown for large area single junction amorphous silicon modules from different manufacturers that have been installed outdoors for more than two years. Several defects are identified as probable sources of poor performance and low efficiency of some devices. Some of the major contributions to these defects are likely to occur during the production process while some are developed during outdoor exposure.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Research Unit

  • Centre for Renewable Energy Systems Technology (CREST)

Citation

VORASAYAN, P. ... et al, 2006. Structural analysis of thin film silicon PV modules by means of large area laser beam induced current measurements. 21st European Photovoltaic Solar Energy Conference, Dresden, Germany, September 2006.

Version

NA (Not Applicable or Unknown)

Publication date

2006

Notes

This conference paper was presented on the occasion of the 21st European Photovoltaic Solar Energy Conference, Dresden, Germany, September 2006.

Language

en

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