title: Electrodeposited Ultrathin TiO2 Blocking Layers for Efficient Perovskite Solar Cells.
abstract: In this study, the electrodeposition (ED) of ultrathin, compact TiO2 blocking layers (BLs) on fluorine-doped tin oxide (FTO) glass for perovskite solar cells (PSCs) is evaluated. This bottom-up method allows for controlling the morphology and thickness of TiO2 films by simply manipulating deposition conditions. Compared with BLs produced using the spin-coating (SC) method, BLs produced using ED exhibit satisfactory surface coverage, even with a film thickness of 29 nm. Evidence from cyclic voltammetry shows that an ED BL suppresses interfacial recombination more profoundly than an SC BL does, consequently improving the photovoltaic properties of the PSC significantly. A PSC equipped with an ED TiO2 BL having a 13.6% power conversion efficiency is demonstrated.
authors.affiliation: Department of Chemical Engineering, National Tsing-Hua University, Taiwan.
authors.forename: Tzu-Sen
authors.initials: TS
authors.lastname: Su
authors.affiliation: Department of Chemical Engineering, National Tsing-Hua University, Taiwan.
authors.forename: Tsung-Yu
authors.initials: TY
authors.lastname: Hsieh
authors.affiliation: Department of Chemical Engineering, National Tsing-Hua University, Taiwan.
authors.forename: Cheng-You
authors.initials: CY
authors.lastname: Hong
authors.affiliation: Department of Chemical Engineering, National Tsing-Hua University, Taiwan.
authors.forename: Tzu-Chien
authors.initials: TC
authors.lastname: Wei