Klipfel, NadjaAlvarez, Agustin O.Kanda, HiroyukiSutanto, Albertus AdrianIgci, CansuRoldan-Carmona, CristinaMomblona, CristinaFabregat-Santiago, FranciscoNazeeruddin, Mohammad Khaja2022-02-142022-02-142022-02-142022-01-1810.1021/acsaem.1c03060https://infoscience.epfl.ch/handle/20.500.14299/185368WOS:000745218200001In this work, we identify the importance of C-60 and compact-TiO2 (cTiO(2)) as electron transport layers on the device performance of coevaporated n-i-p perovskite solar cells. We found (1) a synergetic effect between both layers when extracting the charges and (2) that optimization of the C-60 layer is essential for obtaining devices with enhanced device performance. In particular, we found that a C-60 layer of an optimum thickness (<15 nm) enhances the charge extraction when employed in a coevaporated perovskite solar cell. With thicker C-60 layers (>20 nm), an additional charge transport resistance is observed by impedance analysis, indicating that devices with nonoptimized C-60 thickness could limit the fabrication of highly efficient perovskite solar cells.Chemistry, PhysicalEnergy & FuelsMaterials Science, MultidisciplinaryChemistryMaterials Scienceperovskitevacuum depositionfullerene/metaloxide/impedance spectroscopyinductive loopdepositiongrowthcircuitbilayerorigintext::journal::journal article::research article