| With the rapid development of society,the rapid consumption of fossil fuels in recent decades has led to major environmental problems,such as pollution,global warming and climate change.In addition,the limited natural resources and the rising price of electricity have also caused the global energy crisis.Therefore,one of the effective ways to solve the energy crisis is to find renewable clean energy,namely,to make efficient and reasonable use of solar energy and to manufacture solar cells with high conversion efficiency.Because the energy conversion efficiency of single-junction solar cells is limited by the Shockley-Quiesser limit,the development of laminated solar cells is an effective way to achieve high efficiency.In addition,in the development of photovoltaic technology in recent years,laminated perovskite solar cells（PTSCs）have gradually become the leader in commercialization.In this paper,SCAPS software is used to theoretically simulate laminated perovskite solar cells,and the influence of material parameters of each layer of the cell on the efficiency of the cell is explored as follows:1.SCAPS software was used to simulate the thickness of the wide/narrow band gap absorption layer and the thickness of the electron transport layer SnO2.During the simulation,the value range of the wide band gap absorption layer thickness was 100nm～900 nm,and the value range of the narrow band gap absorption layer thickness was150 nm～600 nm.The following simulation results are obtained.For the thickness of the absorption layer between narrow band gap and wide band gap,the absorption layer cannot be too thin or too thick.When the thickness of the absorption layer between narrow band gap and wide band gap is 300 nm and 500 nm,the short-circuit current value of the layered perovskite solar cell is 21.06 m A/cm~2.The maximum efficiency was 21.95%.When the thickness of SnO2is set at 20 nm～100 nm,the simulation results show that when the thickness of SnO2is set at 20 nm,the short-circuit current value of the stacked perovskite solar cell is 21.09 m A/cm~2,and the maximum efficiency of the cell is 22.21%.2.In order to study the PEDOT:PSS（HTL）layer characteristics of simulated stacked perovskite solar cells,two commonly used parameters,hole mobility and receptor density,were selected to study the influence of the two parameters on the cell conversion efficiency（PCE）by changing the values of the two parameters.The results show that the maximum short-circuit current is 21.30 m A/cm~2and the maximum efficiency is 23.35%when the hole mobility of HTL layer of stacked perovskite solar cells is 2 cm~2/Vs～2.0×10-3cm~2/Vs and the receptor density is 1×1019cm-3.3.The selection of electron hole capture cross section of wide/narrow band gap absorbing layer directly affects the capture ability of electron and hole in composite center.In this paper,the values of the electron hole capture cross sections of the wide/narrow bandgap absorption layer are defined as 2×10-12cm~2～2×10-21cm~2and2×10-13cm~2～2×10-19cm~2respectively.The results show that when the electron hole capture cross section of the wide/narrow band gap absorption layer is 2×10-19cm~2/2×10-19cm~2,the performance of the cell reaches the best state,and the short-circuit current of the laminated perovskite solar cell is 21.52 m A/cm~2and the filling factor is59.08%.The maximum efficiency is 23.80%.4.In order to further improve the internal performance of the battery and improve the filling factor of the battery,the interface defect density of the battery was simulated.The simulation results show that when the interfacial defect density of layered perovskite solar cells is 1×10~6cm-3,the short-circuit current of the cells is 21.52m A/cm~2,the filling factor is 71.65%,and the cell efficiency is 23.80%. |
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