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Graphene as charge transport layers in lead free perovskite solar cell
摘要： Tin-based perovskite material is one of the promising candidates used in lead-free perovskite solar cells. In the present study, the use of graphene material as charge transport layers is suggested and the structure n-Graphene/CH3NH3SnI3/p-Graphene is simulated in AFORS-HET (Automat for Simulation of Heterostructures) software. The effect of layer properties on the performance of the proposed structure is analyzed. After optimizing the layer parameters, the best possible structure gives a Voc = 687.1 mV, Jsc = 19.93 mA cm?2, FF = 77.92% and efficiency = 10.67%. The textured nature of front surface enhances the efficiency of the cell from 10.67% to 13.28%. The effect of operating temperature is observed on the performance of the cell. The proposed structure is also modelled using one diode model in MATLAB software for comparison with AFORS-HET results. The results of the simulated and modelled structure are in good agreement with each other. To the best of our knowledge, the proposed structure and the corresponding results reported herein are new for the research community.
关键词： perovskite solar cell,graphene,AFORS-HET software,efficiency,MATLAB
更新于2025-09-23 15:19:57
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Performance of thin silicon solar cells with a quasi-monocrystalline porous silicon layer on the rear side
摘要： The present study employs porous silicon (PS) or quasi-monocrystalline porous silicon (QMPS) as a reflector material on the rear side. It presents an analytical model that simulates the performance of n+–p–p+ thin silicon solar cell with a QMPS layer on the rear side. The development of the model involves the formulation of a complete set of equations for the photo-current density that is then solved analytically in the base region, including the photocurrent generated under the effect of the light reflected by QMPS layer. This also takes the contribution of the back p+-region (back surface field) to the generated photocurrent into consideration. The enhancements brought by the thin film QMPS with regard to photovoltaic (PV) parameters are then investigated and compared to those brought by the conventional silicon solar cell. Moreover, the effect of the QMPS layer on the current–voltage characteristics J–V and the internal quantum efficiency (IQE) of thin silicon solar cells are simulated by means of AFORS-HET software. These simulations show that the improvement of the PV parameters is due to an increase in the transport parameters of minority carriers in the p-region.
关键词： porous silicon,thin silicon solar cells,quasi-monocrystalline porous silicon,photovoltaic parameters,AFORS-HET software
更新于2025-09-12 10:27:22