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2012
Conference Paper
Titel
Process characterisation of MWT solar cells - a new method to analyse via contacts
Abstract
A newly developed characterisation method at Fraunhofer ISE allows a precise evaluation of via contact formation by determining the via resistance for metal wrap through (MWT) solar cells. Based on a previously presented via characterisation method for test structures, the new measurement setup is able to automatically characterise via-contacts directly on a solar cell. Due to its flexible design, the setup is adjustable to any cell size and any contact arrangement. The modified four point probe measurement setup with flat electrodes on the front and spiky electrodes on the rear of the cell facilitates the measurement and precise the alignment on a each MWT-via contact. The new device is an important characterisation instrument for the evaluation and optimization of via-contacts directly on cell level.
Author(s)