Towards an ink-based method for the deposition of ZnxCd1-xS buffer layers in CZTS solar cells
This work explores two different deposition methods to grow buffer layers of ZnxCd1−xS for application in kesterite (Cu2ZnSnS4 (CZTS)) solar cells. The introduction of the mixed sulfide of Cd and Zn in CZTS based solar cells represents an important progress due to the improved device performance and minor toxicity with respect to sole CdS. The explored techniques are the chemical bath deposition (CBD) and the precursor ink. For the CBD we focused on the inclusion of zinc into the buffer, i.e. the target solid solution, taking into account the difference in the solubilities of ZnS and CdS.