الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Perovskite solar cells (PSCs) have attracted considerable at-tention as a competitor technology in solar cells due to the rapid en-hancement in their power conversion efficiency (PCE) in recent years. PSCs have several advantages such as their bandgap tunability, lower cost, tolerance of high impurities, long diffusion length and wide optical absorption. In this thesis, different electron transport materials (ETMs) have been analyzed with a new Copper Iodide (CuI) Hole Transport Material (HTM) to replace the conventional electron and hole transport materials for PSCs, such as the titanium dioxide (TiO2) and the expensive Spiro-OMeTAD which has been known to be suffer from performance degradation. Moreover, the influence of the electron transport layer (ETL), hole transport layer (HTL) and the perovskite layer thicknesses on the overall cell performance, is stud-ied. The design of the proposed PSC is performed utilizing SCAPS-1D simulator (Solar Cell Capacitance Simulator-one dimension). Be-cause of its high electron affinity and tunable bandgap, zinc oxysul-fide (ZnOS) is found to be the best replacement for TiO2 as ETM. The results show that lead-based PSC with CuI as HTM is an effi-cient arrangement and better than the easily degradable and expen-sive Spiro-OMeTAD. According to the presented simulation and tun-ing of various layers thicknesses, the highest designed efficiency is 26.11%. In addition, different ETMs have been simulated with cop-per oxide (CuO) as HTM in Iodide/chloride mixed halide perovskite MAPbI3-xClx by incorporation of Chlorine (Cl) in perovskite lead hal-ides (MAPbI3) is used because MAPbI3-xClx films have a long term of thermal stability than MAPbI3 and better carrier diffusion length. In addition, a proposal for tuning the features and parameters of the PSCs, such as the thickness and defect density of the perovskite lay-er, the electron, and hole transport layers, the doping concentrations, and the bandgap energy, has been introduced. The results showed that the tuned mixed halide PSCs with ZnOS as an electron transport material and CuO as a hole transport material have the highest perfor-mance with a power conversion efficiency of 30.82%. This achieve-ment represents a 4.71% increase in conversion efficiency.