Study On Preparation And Photoelectric Properties Of Organic-Inorganic Hybrid Perovskite Solar Cell

Perovskite material has shown excellent performance and strong competitiveness in the field of solar cells.It has the advantages of low cost of organic matter,film formation by solution preparation,and high electron mobility and high absorption coefficient.Perovskite materials can absorb enough photons to generate electron-hole pairs and transport electron-hole pairs,and their photoelectric conversion performance rapidly exceeds that of silicon solar cells and dye-sensitized solar cells.Adjusting the composition of the perovskite layer and the perovskite solar cell preparation process can make the perovskite material have better potential:change the organic cation in the perovskite layer,adjust the band gap and absorption spectrum;optimize the morphology and interface of the perovskite film.It can improve carrier mobility and reduce parallel resistance and increase photocurrent.The commercialization of perovskite solar cells must take into account the processes and costs involved in the manufacturing process.For perovskite solar cells,the stability of the perovskite solar cell needs to be solved.Based on the composition control and optimization of the perovskite layer,this paper effectively implements an efficient inverted perovskite solar cell,which can be divided into the following three parts:（1）Study the effect of adjusting the ratio of FA/MA on the morphology and device properties of perovskite film under air ambient conditions.The experimental results show that by adjusting the FA/MA ratio,the band gap of the perovskite material can be adjusted to find a high-efficiency band gap.Improving the interfacial properties of the electron transport layer and the silver electrode by modifying the surface of the electron transport layer fullerene derivative（PCBM）.Bphen modifies the surface of the electron transport layer PCBM,which reduces the energy difference between the electron transport layer and the silver electrode,and it is more conducive to electron collection,thereby improving the short-circuit current(J_sc)and the open circuit voltage(V_oc)and the fill factor（FF）of the device,thereby improving the photoelectric conversion efficiency of the perovskite solar cell.（2）Exploring the effect of adjusting the ratio of Cs⁺ions in ternarycations on the photoelectric properties of planar inverted perovskite films and their devices.The perovskite solar cell combines the advantages of FA,MA,and Cs ions to both adjust the band gap of the perovskite layer and increase the stability of the perovskite solar cell.The experimental results show that the doped small amount of Cs⁺ions is beneficial to the crystallization of perovskite film and improve the stability of the device.However,excessive Cs⁺ions will cause the lattice structure of the perovskite to deform,resulting in a poor photoelectric conversion performance and stability.（3）Study the effect of the annealing process of the MAPbI₃ perovskite layer on the morphology and device properties.In this experiment,a two-step annealing method was used to prepare MAPbI₃ perovskite film.The effects of different annealing temperatures on the crystallization and battery properties of perovskite films were investigated.At the same time,compared with traditional direct annealing and gradient annealing,different annealing processes were explored.And explore the effect of different annealing processes on the photoelectric conversion performance of perovskite solar cells.