Highly efficient planar heterojunction perovskite solar cells with sequentially dip-coated deposited perovskite layers from a non-halide aqueous lead precursor

摘要

High-performance planar heterojunction (PHJ) perovskite solar cells (PrSCs) with MAPbI _(3) perovskite films were fabricated using a facile, environmentally benign, efficient and low-cost dip-coating deposition approach on a bilayered ZnO/TiO _(2) electron transport system from aqueous non-halide Pb(NO _(3) ) _(2) . Outstanding performance of PrSCs was achieved due to the PHJ configuration of FTO/TiO _(2) /ZnO/MAPbI _(3) /spiro-OMeTAD/MoO _(3) /Ag. These PHJ PrSCs exhibited better performance and stability with thinner ZnO layers in contrast to those with mesoporous TiO _(2) scaffolds, indicating that the thickness of the ZnO layer in the PHJ architecture significantly affected the surface coverage, morphology, crystallinity, and stability of the MAPbI _(3) perovskite films processed by dip-coating deposition.