Abstract
Perovskite solar cells came to limelight owing to their simple fabrication processes, cost-effectiveness, better optoelectronic characteristics and outstanding power conversion efficiencies (PCEs). These solar cells have simply outpaced their rival cells since the alteration from aqueous hole transport layers (HTLs) to solid HTLs. Various layers of a perovskite cell viz. light absorber layer, electron transport layer (ETL) and HTL play a decisive role in ascertaining its performance. Today, various types of organic and inorganic HTLs are available but inorganic HTLs have gained an upper hand over their organic counterparts in terms of stability, cost, fabrication and material properties which represent them as a prospective candidate for optimum perovskite device. Copper antimony sulfide (CuSbS[Formula: see text] is a common HTL available in abundance with the benefit of an adequate bandwidth of 1.54[Formula: see text]eV. In addition, CuSbS2 possesses substantial band aligning and electron inhibiting features. This research paper elaborates a relative study of two perovskite solar devices possessing discrete inorganic hole transport layers, i.e., cuprous iodide (CuI) and copper antimony sulfide (CuSbS[Formula: see text], and discrete perovskite layers, i.e., MAPbI[Formula: see text]Cl[Formula: see text] and MASnI3, using the same negative charge transport layer, i.e., Cd[Formula: see text]Zn[Formula: see text]S, through numerical simulation employing SCAPS-1D. The effects of thickness, defect density and doping concentration with respect to absorbing layer on the efficiency and other parameters of perovskite layers are also discussed. By employing CuSbS2 with MASnI3 in the proposed device, the solar cell parameters are efficacious enough demonstrating the [Formula: see text] of 1.10[Formula: see text]V, PCE of 31.11%, fill factor (FF) of 83.05% and [Formula: see text] of 33.75[Formula: see text]mA[Formula: see text]⋅[Formula: see text]cm[Formula: see text].
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