Abstract
Perovskite solar cells were studied using PVK as hole-transporting layer and different anti-solvent process. We have fabricated CH3NH3PbI3 (MAPbI3) photoactive layer using chlorobenzene (CB) solution and PVK in CB solution as the anti-solvent solution, respectively. The results show that the power conversion efficiency is enhanced to 14.7% by using 2.5 mg/mL PVK in CB solution as the anti-solvent, which is significantly improved compared with 12.85% for the device treated using CB. PVK in CB as the anti-solvent solution facilitates the hole transport for MAPbI3/PVK heterojuction as well as good crystallinity and less PbI2 residues in MAPbI3 photoactive layer.
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