Fully printed perovskite solar cells (PSCs) were fabricated in air with all constituent layers, except for electrodes, deposited by the blade coating technique. The PSCs incorporated, for the first time, a nanometer-thick printed Bathocuproine (BCP) hole blocking buffer using blade coating technique and deposited at relative humidity up to 50%. The PSCs with a p-i-n architecture (Glass/Indium tin oxide(ITO)

Our findings demonstrate the importance of kinetic factors in determining the overall charge separation efficiency in D/A systems.