Passivation of Bulk and Interface Defects in Sputtered-NiOx-Based Planar Perovskite Solar Cells: A Facile Interfacial Engineering Strategy with Alkali Metal Halide Salts
Metal–halide hybrid perovskites have prompted the prosperity of the sustainable energy field and simultaneously demonstrated their great potential in meeting both the growing consumption of energy and the increasing social development requirements.
An interfacial engineering strategy is successfully developed with a maximum PCE of 20.22%, a high VOC of 1.084 V and a relatively low non-radiative recombination loss in inverted planar perovskite solar cells.
Alkali metal halide additives chelate with Pb2+ ions during film formation promoting homogeneous nucleation, which greatly enhances the power conversion efficiency (15.08%) and stability (over 50 days) of planar perovskite solar cells.