Dresden 2009 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 48: Poster 2

HL 48.72: Poster

Thursday, March 26, 2009, 15:00–17:30, P2

Determination of the a.c. parameters of photovoltaic solar cells — •Erika Kancsar, Markus Drapalik, Julian Schmid, and Viktor Schlosser — Faculty of Physics, University of Vienna, 1090 Vienna, Austria

Photovoltaic solar cells are widely used for direct sunlight to electricity conversion. Principally a solar cell generates a current which is proportional to the incident light intensity which includes current fluctuations caused by photon noise. A solar power generator therefore may become a significant source of electromagnetic distortion which can cause malfunction of other electrical equipment and increase biological risks associated with a higher level of electromagnetic noise in the ambience. In order to predict the response of a solar cell to light fluctuations, the transfer function or the equivalent circuit must be known. In this work we investigate the a.c. behaviour of single solar cells and small modules connected to a simple load circuit in order to evaluate the necessary elements which describe the equivalent a.c. circuit under operating conditions. The results will be discussed with respect to different designs of photovoltaic devices.