Superposition Method for Correction of Error Caused by Bus-Bar Probe Shading Effect on Characterisation of Large Size Solar Cell

摘要

The bus-bar probes are used in characterisation of large size silicon solar cell. There are numbers (2 - 5) of bus-bar probe on the front surface of the cell to collect electric current produced by the cell during the measurement. As there are a few millimetres thickness of a bus-bars probe, its shading on the cell under light radiation will affect on the measurement accuracy of solar cell. In order to make a correction for the error caused, a superposition method has been developed with which the measurement error can be corrected by 3.8 % for a large size (156 mm × 156 mm) silicon poly-crystalline solar cell with three bus-bars.