Critical role of Interface and perovskite lattice in high-efficiency and photostable solar cells
Résumé
Los Alamos National laboratory (LANL) developed an efficient growth procedure for 3D halide perovskites in inverted perovskite cell architecture using PEDOT-PSS as a p-type hole transporting material (HTM). The initial collaboration between FOTON/ISCR and LANL led to the observation of a reversible self-healing mechanism under light soaking and showed that the aging of the precursor solution plays a role in the nucleation of the perovskite crystallites. In this study, we show that growth of methylammonium lead perovskites (MAPbI3) on nickel oxide (NiO) HTM, results in the formation of ordered and crystalline thin-films with enhanced crystallinity, leading to characteristic XRD Bragg peak width reminiscent of exclusively observed in the tetragonal phase in single-crystals.