Community Research and Development Information Service - CORDIS


The laser beam induced current (LBIC) technique has been tested to evaluate the possibility of its use as inline tool for module and string characterization, in terms of speed and reliability. As it is difficult to identify the sources of efficiency losses of a module or string from current-voltage curves, the laser scanning technique has here been applied to the study of the correlation of the individual cell parameters connected in a series string. Analysis has been conducted on sets of different manufacturers interconnected strings of 4 cells each, by correlating single cell IV, string IV characteristics, cells and strings. Single line-scans have been demonstrated to be sufficiently sensitive to identify local defects, shunts and cracks in series connected strings. The method is suitable for an inline application. Additionally further investigations have been made, which determine, with significant resolution the detailed photocurrent map of suspect cells. These significant maps have been obtained in less than 3 seconds.

Additional information

Authors: AGOSTINELLI G ET AL, JRC, Renewable Energies Unit, Ispra (IT);ACCIARRI M, INFM, Department of Materials Science, Milano (IT);RACZ A, INFM, Department of Materials Science, Milano (IT);HYLTON J, Netherlands Energy Research Foundation, Petten (NL);EINHAUS R, Photowatt International, Bourgoin Jallieu (FR);LAUINGER T, ASE, Alzenau (DE)
Bibliographic Reference: An oral report given at: The 17th European Photovoltaic Solar Energy Conference and Exhibition. Held in: Munich (DE), 22-26 October 2001
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