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Suns‐PLI as a powerful tool for spatially resolved fill factor analysis of solar cells
Author(s) -
Michl Bernhard,
Impera Davide,
Bivour Martin,
Warta Wilhelm,
Schubert Martin C.
Publication year - 2014
Publication title -
progress in photovoltaics: research and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.286
H-Index - 131
eISSN - 1099-159X
pISSN - 1062-7995
DOI - 10.1002/pip.2293
Subject(s) - suns in alchemy , photoluminescence , heterojunction , materials science , optoelectronics , recombination , spice , silicon , electronic engineering , chemistry , engineering , biochemistry , gene
We show the benefits of spatially resolved pseudo fill factor analysis on multicrystalline silicon solar cells. Hereby, we present a method based on quasi‐steady‐state photoluminescence‐calibrated photoluminescence images at varying generation rate. We verify the method by a comparison with global and local Suns‐ V oc measurements and apply Suns‐PLI to multicrystalline heterojunction samples with and without conductive top layer, the latter being not accessible by Suns‐ V oc . Thereby, we obtain detailed insight into the influence of injection‐dependent local recombination on fill factor and of losses only due to recombination‐driven lateral balancing currents. The conclusions are supported by Spice network simulations. Copyright © 2012 John Wiley & Sons, Ltd.