Semiconducting metal oxide electron transporting layers (ETLs) with distinct morphologies have the ability to produce the less-hysteric and high efficiency perovskite solar cells (PSCs). Here, for the first time we introduce a viable electrospraying route for one-step deposition of highly mesoporous SnO2 nanosheets, as the ETLs in PSCs with reduces hysteresis, high charge collection efficiency and improved ambient stability. Furthermore, optimization of the interfacial properties between the SnO2 nanosheets and the perovskite absorber layer by the employment of a C60 interlayer consequences in decreasing the charge recombination, better energy level alignment, and significantly improved power conversion efficiency (PCE). Consequently, the efficient PSCs based on C60-modified SnO2 nanosheets ETLs have almost hysteresis-free behavior, with a best PCE of 20.2% thanks to the highly porous nature of nanosheets and better perovskite infiltration. This study reveals that hierarchical SnO2 is a possible ETL for producing low-cost and efficient PSCs with long-term stability. (C) 2018 Elsevier Inc. All rights reserved.