KCl treatment perovskite solar cell is widely used for surface passivation purpose. I am working on KCl treatment of SnO2 layer. Can you kindly let me know the mechanisms and physics involved behind doing the KCl treatment in terms varios dopants, anneling temeprature, processing conditions of the layer?
Thank you
Deepak Punetha
When perovskite is subjected to a KCL treatment, K+ and Cl- diffuse into the bulk of the material, improving perovskite crystallinity and passivating the defect at the perovskite/ETL interface. The added KCl will raise the conduction edge, which might raise PCE as well as Voc.
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