4 years ago

Humidity resistant fabrication of CH3NH3PbI3 perovskite solar cells and modules

Humidity resistant fabrication of CH3NH3PbI3 perovskite solar cells and modules
A humidity resistant and versatile fabrication method for the production of very high quality, organic-inorganic perovskite films, solar cells and solar modules is presented. By using ethyl acetate as an anti-solvent during deposition, perovskite solar cells with power conversion efficiencies (PCEs) up to 15% were fabricated in a 75% relative humidity (RH) environment. Ethyl acetate acts as a moisture absorber during spin-coating, protecting sensitive perovskite intermediate phases from airborne water during film formation and annealing. We have demonstrated the manufacture of 50mm × 50mm series interconnected modules with PCEs in excess of 10% for 13.5cm2 devices processed in air at 75%RH and 11.8% at 50%RH. To the best of our knowledge, these results represent the highest efficiency for perovskite solar modules processed under high humidity ambient conditions. This new deposition protocol allows for low-cost, efficient and consistent device fabrication in humid climates and uncontrolled laboratories.

Publisher URL: www.sciencedirect.com/science

DOI: S2211285517303932

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