INVESTIGATIONS OF RF NOISE INTRODUCED BY PHOTOVOLTAIC SOLAR POWER GENERATORS

M. Drapalik¹⁾, V. Schlosser¹⁾, J. Schmid¹⁾, P. Bajons²⁾, G. Klinger³⁾

1. Department of Electronic Properties of Materials, Faculty of Physics, University of Vienna

2. Department of Scattering and Spectroscopy, Faculty of Physics, University of Vienna

3. Department of Meteorology and Geophysics, University of Vienna

A-1090 Vienna, Austria

ABSTRACT: We have investigated the a.c. behaviour of crystalline silicon solar cells with abrupt pn-junction doping profiles. From small signal admittance measurements we derived the complex impedance of the solar cell. The low frequency transfer function up to 1MHz was determined by modelling the circuit of the solar cell connected to an external impedance. Under laboratory conditions we examined the current response of the solar cells connected to an external impedance caused by periodic light intensity variations or mechanical vibrations with respect to our model calculations. We found that the investigated solar cells act as a low pass filter in the external current loop with a bias voltage dependent bandwidth which can exceed 100 kHz.

Keywords: Electromagnetic Compatibility – Silicon Solar Cell - Impedance