Organic Solar Cell Based On PM6 System Performance Research And Series Parallel Design Simulation

Today,with the increasing importance of energy issues,the development of green and clean energy has become a global concern.Solar energy is one of many clean energy sources,which has little impact on the environment and no geographical restrictions,and has become a research hotspot.Organic solar cell have become a research hotspot in recent years and the photovoltaic performance of organic solar cells has made a major breakthrough.But it has not achieved the performance of merchant silicon-based solar cells.In addition,the current high-performance device area is generally less than 0.1 cm~2.Therefore,it is necessary to furthermore enhance the photovoltaic efficiency of devices and prepare large-area devices as the basic units of photovoltaic modules.First,we brought the donor material D18-CL into the PM6:Y6 binary system to prepare the ternary organic solar cell,which helped the problem of low short circuit current and enhanced the short circuit current and the photovoltaic performance of the device.The influence of different blending ratios of D18-CL on the efficiency of the component was studied.Through testing and characterization,it is concluded that the introduction of D18-CL helps the ternary blend membrane to form a good nanoscale phase separation structure,reduces large molecular aggregation and defects,and promotes the dissociation efficiency of excitons.When the blending ratio of doping is 20wt%,the maximum photovoltaic efficiency of the device is 16.08%.Compared with the undoped device,the performance of the device is improved by 19%.The short-circuit current is rise from 25.36 m A/cm~2 to 28.13 m A/cm~2,and the filling factor is rise from64.62%to 70.25%.Secondly,on the basis of obtaining the optimal doping ratio,we prepared a large area device with an area of 1.76 cm~2.Because the performance of large-area devices has higher requirements on the thickness and morphology of the film,we have optimized the thickness and annealing temperature of the active layer film of large-area devices.By comparing the four film thicknesses and annealing temperatures,the optimal film thickness and annealing temperature for the device are 105 nm and 110℃respectively.The photovoltaic efficiency of the optimized device reaches 8.15%,and the filling factor reaches 46.6%.In addition,based on the large area in front of the device,the connection mode of organic battery components is simulated,and the organic photovoltaic components of 9device units in different series of parallel modes are analyzed by simulation,it is concluded that the series-parallel mode of five series-parallel and four parallel-parallel can increase the output power of the module compared with the series-parallel mode.It is further studied that different light intensities mainly affect the short-circuit current of organic photovoltaic modules,and different ambient temperatures mainly affect the open-circuit voltage of organic photovoltaic modules.Based on the ternary strategy,this thesis improves the photovoltaic efficiency of the component and verifies the reliability of this strategy.Further preparation of large-area devices and optimization of film thickness and annealing temperature were carried out.Subsequently,it simulates the connection mode of photovoltaic modules.This series-parallel mode can effectively improve the output power of organic photovoltaic modules.