γ-MPTS-SAM modified meso-TiO2 surface to enhance performance in perovskite solar cell

In this work, a self-assembled monolayer (SAM) of γ-Mercaptopropyltrimethoxysilane (γ-MPTS) based a simple and easy-proceeding soaking method is prepared on the interface of the mesoporous TiO2 (meso-TiO2)/perovskite. The meso-TiO2 surface of perovskite solar cells modified with the γ-MPTS-SAM method were characterize by X-ray diffraction (XRD), scanning electron microscope (SEM), atomic force microscope (AFM), contact angle and photoluminescence, it was found that the introduced γ-MPTS can reduce carrier recombination and optimize MAPbI3 crystal growth, which could significantly increase the PCE performance of the cell. The champion PCE is boosted to 16.50% compared with that of the unmodified device (14.36%). Finally, this interface modification method can be adopted for the application of perovskite solar cells in the foreseeable future.