Effect Of Donor Character With PCBM(N2200) As Acceptor On Solar Cell Performance

With the development of economy and population growth,people’s demand for energy is increasing.Solar energy has the advantages of unlimited reserves,no pollution,wide distribution,easy collection and utilization,and is considered to be an ideal next-generation energy source.Solar cells can directly convert solar energy into electrical energy,which has been developed and utilized,and has received widespread attention.In recent years,organic solar cells have developed rapidly,but there is still a long way to go from commercialization.In order to improve the performance of the device,on the one hand,it is necessary to speed up the exploration and development of new materials.On the other hand,it is necessary to optimize and modify the device based on the existing materials.At the same time,the understanding of the theoretical research of photovoltaic process needs further exploration,which can guide the design of materials and device optimization.Based on this,this paper focuses on the active layer of organic solar cells,and has done research work on the physical mechanism of several existing novel organic solar cells.In the ternary organic solar cell system,through the performance,physical parameters and topography of the three components and the two components,the in-depth understanding and recognition of how the small molecule BTR improves the performance of the two components.By balancing the transmission characteristics,adjusting the reduction factor,mitigating charge recombination,and accelerating charge collection,it has a good guiding effect on the design of the new ternary system.In an all-polymer solar cell system,the reason why the two devices exhibited significantly different optoelectronic properties was investigated by matching different donors with similar properties to the same acceptor.In this work,we found that unbalanced mobility does not necessarily impede battery performance,but rather moderates recombination during transmission.In addition,energy level differences and energy disturbances do not completely lead to changes in the open circuit voltage of the battery,and other internal factors such as non-radiative losses can also play a large role.This provides new ideas for all-polymer molecular design.