The Influence of the Electrode Sheet Resistance on Local Photocurrent Excitations in Microcrystalline Silicon Thin Film Solar Cells

M. Nguyen, M. Stegmaier, A. Schütt, J. Carstensen, H. Föll
CELLO (solar cell local characterization) measurements on a microcrystalline silicon (μc-Si) solar cell in the LBIC (laser beam induced current) mode under dark conditions are used to analyze the bias voltage dependence of the average current response and the lateral current distribution. The experimental results are compared to a SPICE simulation of a newly introduced three dimensional (3D) equivalent circuit model of a solar cell divided into subcells. Furthermore, the global current response
more » ... al current response due to local photoexcitation is described theoretically. The 3D simulation shows the necessity of taking subcell-subcell interactions into account in order to explain the lateral current response. The simulations are validated against our CELLO measurements of the average current response as well as the lateral current distribution and show excellent agreement.
doi:10.4229/27theupvsec2012-3dv.1.59 fatcat:ppduh6pnsbaxzcrx455qyxfeoy