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The numerical simulation of inorganic halide based perovskite solar cell has been performed. This paper demonstrates the use of CsPbI2Br as a perovskite layer in the device simulation based on SCAPS 1D for the first time. The magnesium doped zinc oxide (ZnMgO) as an electron transport layer (ETL) of varying band gap has been used and correspondingly the photovoltaic performance has been measured. The values of the band gap of ZnMgO layer has been directly taken from the literature where the variation in band gap has been performed by changing the magnesium concentration in the ETL layer. It has been elucidated from the simulation results that with the increase in band gap of ZnMgO layer, the photovoltaic performance decreases. This is mainly because the ZnMgO layer with wider band gap has higher carrier recombination. Moreover, the increase in recombination also degrades the other parameters such as VOC, JSC, and FF of the simulated device. [ABSTRACT FROM AUTHOR]

MXene, a new member from 2D materials possesses high conductivity, large interlayer spacing, hydrophilic nature and large surface area. An approach to synthesize 2D MXene from its precursor "MAX" is proposed at room temperature. MAX belongs to the family of ternary layered carbides and nitrides. A proof of successful etching of aluminium from MAX and exfoliation of MXene is illustrated. Characterizations such as SEM and XRD for microstructures and structural changes are performed to confirm the etching of A layer. From the benefits of large interlayer spacing between M and X layer of MXene, multi-layered MXene is further delaminated to few layered MXene sheets using organic polymer DMSO. The possibility of synthesising MXene from liquid phase exfoliation can be further used in supercapacitor application. [ABSTRACT FROM AUTHOR]

The presence of lead material in lead halide perovskite absorber is always remains a major obstacle due to its toxic nature. The emergence of tin halide perovskite absorber will overcome this toxicity issue and due to its extraordinary properties such as direct band gap and compatible visible spectrum of solar cells attracts a wide attention to researchers to focus on the development of lead free perovskite solar cells. This paper comprises of the device simulation of lead-free perovskite material. In addition, effect of various hole transport layers, and the effect of absorber band gap have been studied. It has been observed from the results that along with the proper band alignment of HTM layer with perovskite layer, the mobility of HTM layer plays an important role to achieve better device performance. Furthermore, it has been concluded that Cu2O layer as a hole transport material exhibits better device performance as compare to the other HTM layer used in this paper. [ABSTRACT FROM AUTHOR]