Abstract
An efficient electron transport layer (ETL) is an essential requirement for performance and stability for perovskite solar cells. In this study, we have opted Zn1-xNixO/ZnO bilayer as is used electron transport layer instead of the ZnO single layer to overcome the trap-assisted recombination and also to enhance energy level alignment in the solar cell. For this, pristine ZnO and Ni-doped ZnO (Ni–ZnO) thin films were deposited on fused silica (Quartz) by pulsed laser deposition (PLD). For confirmation of the structural properties of deposited thin films, X-ray diffraction has been used. Electron affinity and band gap of these films have been evaluated by UPS and UV–Vis spectroscopy to design Zn1-xNixO/ZnO bilayer ETL. Further, planar perovskite solar cell has been schematized and simulated using SCAPS-1D software using experimentally designed bilayer ETL.
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