Shunts due to laser-scribing of solar cells evaluated by highly sensitive lock-in thermography

Breitenstein, O., Langenkamp, M., Lang, O. and Schirrmacher, A.

Technical Digest of the 11th International Photovoltaic Science and Engineering Conference (PVSEC-11) pp 285-286 (Ed.) Saitoh, T., Tanaka Ltd., Kyoto, Japan (1999)

Using a 200 Hz focal plane array (FPA) thermocamera attached to two parallel-running DSP frame grabber boards in a PC, a highly sensitive lock-in thermography system has been built, enabling the detection of periodic surface temperature oscillations below 10 mK (r.m.s). This system has been used to investigate edge leakage currents in silicon solar cells after laser scribing and cleavage.

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