High efficiency photovoltaic module based on mesoscopic organometal halide perovskite.

We fabricated monolithic solid state modules based on organometal CH₃NH₃PbI₃ and CH₃NH₃PbI_{3 − x}Cl _x perovskites using poly-(3-hexylthiophene) and Spiro-OMeTAD as hole transport materials (HTMs). In particular, we developed innovative and scalable patterning procedures to minimize the series resistance at the integrated series-interconnections. By using these optimization steps, we reached a maximum conversion efficiency of 8.2% under AM1.5G at 1 Sun illumination conditions using the CH₃NH₃PbI_{3 − x}Cl _x perovskite and the poly-(3-hexylthiophene) as HTM. Finally, we investigated the double-step deposition of CH₃NH₃PbI₃ using the Spiro-OMeTAD, reaching a maximum conversion efficiency on active area (10.08 cm²) equal to 13.0% (9.1% on aperture area) under AM1.5G at 1 Sun illumination conditions. This remarkable result represents the highest PCE value reached for the perovskite solar modules. Copyright © 2014 John Wiley & Sons, Ltd. [ABSTRACT FROM AUTHOR]