Fig. 5From: Efficiency Enhancement of Perovskite Solar Cells by Pumping Away the Solvent of Precursor Film Before Annealing a The steady-state photoluminescence spectra of both perovskites on the ITO/PEDOT:PSS surface, prepared by annealing the precursor film directly or by annealing the precursor film after pumping away the solvent. b Nyquist plots at V ≈ V oc for the reference and modified devices with the structure of ITO/PEDOT:PSS/MAPbI3 − x Cl x /PC60BM/AgBack to article page