Understanding process-related efficiency variations in mc-Si PERC cells

Published: March 4, 2016

By Sven Wasmer, Johannes Greulich, Hannes Höffler, Nico Wöhrle & Stefan Rein, Fraunhofer ISE

This paper introduces and explains a simulation-assisted approach for determining and ranking the most influential causes of variations in experimentally obtained solar cell efficiencies, using the example of an industrially feasible multicrystalline silicon (mc-Si) passivated emitter and rear cell (PERC) process. The approach presented is especially helpful for ramping up PERC production; however, since it is basically transferable to any solar cell concept, it can also be applied to optimize established production lines.

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