Solution-processed In₂S₃buffer layer for chalcopyrite thin film solar cells

We report a route to deposit In₂S₃ thin films from air-stable, low-cost molecular precursor inks for Cd-free buffer layers in chalcopyrite-based thin film solar cells. Different precursor compositions and processing conditions were studied to define a reproducible and robust process. By adjusting the ink properties, this method can be applied in different printing and coating techniques. Here we report on two techniques, namely spin-coating and inkjet printing. Active area efficiencies of 12.8% and 12.2% have been achieved for In₂S₃-buffered solar cells respectively, matching the performance of CdS-buffered cells prepared with the same batch of absorbers.

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Published in: EPJ Photovoltaics
License: https://creativecommons.org/licenses/by/4.0/
See article on publisher's website: https://dx.doi.org/10.1051/epjpv/2016001