Influence of the lock-in frequency on shunt measurements in solar cells using contact thermography

Langenkamp, M. and Breitenstein, O.

Proceedings of the 2nd World Conference on Photovoltaic Energy Conversion pp 1371-1381 (Eds.) Schmid, J., Ossenbrink, H. A., Helm, P. and Dunlop, E. D., Joint Research Centre of European Commission, Luxembourg, Luxembourg (1999)