| Flexible perovskite solar cells(F-PSCs)have broad application prospects in the field of wearable devices due to their flexibility and portability.F-PSCs can be prepared by solution method with low cost and rapid development in the photovoltaic field.However,there are still some problems in the preparation process of flexible perovskite solar cells,which make them always lower than the rigid devices prepared by the same process.For example,the ITO of the common substrate conductive layer of F-PSCs is easy to break,which reduces the mechanical stability of the devices in application;The electrode needs to be prepared by vacuum evaporation deposition technology,which is not conducive to large-scale production.In order to optimize the preparation process of F-PSCs and improve the device performance,the following research has been done in this paper:(1)We use SCAPS software to simulate F-PSCs,establish a cell model,study the material,structure and photoelectric parameters of the device,determine the material combination of SnO2-MAPbI3-Spiro-OMeTAD positive structure based on the device efficiency,preparation process and material cost,and discuss the optimal thickness of the cell functional layer The hole-free transport layer and the battery with full perovskite structure have been studied,and the feasibility of full perovskite structure has been determined.We have studied the influence of the photoelectric parameters of perovskite materials on the performance of F-PSCs,providing a reference for the experimental preparation of F-PSCs with high efficiency and high stability.(2)We prepared a flexible perovskite solar cell with an efficiency of 11.82%by a one-step solution spin-coating method,and improved the ratio of PbI2 and MAI,annealing temperature and time,and the preparation process of SnO2 electron transport layer during the experiment,which improved the performance of the cell and obtained the best experimental parameters for preparing F-PSCs.For the device electrode,we prepared conductive silver colloid electrode by coating method and silver nanowire electrode by spin coating method.Compared with the traditional evaporation method,these two processes require less equipment and can be prepared at low temperature.(3)In order to solve the problems existing in the preparation of flexible perovskite solar cell substrate and electrode,we adopted the laser-induced graphene process to prepare graphene electrode based on polyimide(PI)film.Through the optimization of experimental parameters and the addition of AgNO3 and PEO,the conductivity of graphene electrode was improved,so that it could be applied to the cell,and PI film was used as the substrate,Laser-induced graphene prepared F-PSCs with an efficiency of 3.44%for the electrode.The battery performance was improved by improving the transverse spacing of graphene electrodes,which simplified the preparation process of the electrode,improved the substrate of F-PSCs,and gave full play to the advantages of graphene’s high conductivity as the electrode. |
