ILGAR In2S3 buffer layers for Cd-free Cu(In,Ga)(S,Se)2 solar cells with certified efficiencies above 16% (pages 855–861)
Rodrigo Sáez-Araoz, Johanna Krammer, Susanna Harndt, Tristan Koehler, Martin Krueger, Paul Pistor, Axel Jasenek, Frank Hergert, Martha Ch. Lux-Steiner and Christian-Herbert Fischer
Article first published online: 11 JUL 2012 | DOI: 10.1002/pip.2268
New record efficiencies (independently confirmed by ISE) above 16% for chalcopyrite-based thin-film devices are presented using commercially available Cu(In,Ga)(S,Se)2 absorbers with In2S3 buffer layers deposited by spray ion layer gas reaction (ILGAR) provided by BOSCH Solar CISTech GmbH. The route followed to optimize the buffer layer and a statistical study comparing In2S3 with CdS references are shown. ILGAR In2S3 is an advantageous replacement for the standard CdS buffer layers.