Research On Transparent Electrodes For High Efficiency Flexible Organic Solar Cells

The existence of severe environmental pollution and energy consumption crisis has led to a gradual increase in the use of green,non-polluting and purely natural solar energy resources.In recent years,organic solar cells(OSCs)have attracted widespread attention and become a hot spot for solar cell research because of their low fabrication cost,low-temperature processing,flexible preparation,and their promising applications in intelligent wearable devices,portable electronics,architectural photovoltaic fields,and militarized applications.Among them,high-performance(high transparency and low resistance value)transparent electrodes are an important part of the preparation of high-efficiency flexible organic solar cells.The conventional method of depositing indium tin oxide(ITO)conductive films to prepare transparent electrodes has many drawbacks,so the development of transparent electrodes suitable for flexible solar cells is an urgent problem.This thesis focuses on the preparation of high performance flexible organic solar cells by using flexible AgNWs electrodes and modifying them,and the research is as follows:(1)To explore AgNWs as a flexible transparent bottom electrode,due to its chemical polar instability and higher roughness,etc.A conductive polymer aqueous solution PH1000(EG doped)is hereby introduced as a buffer transition layer to modify the AgNWs electrode,which is prepared to form AgNWs/PH1000 composite flexible electrode.Through extensive experiments,we find the optimal film-making process parameters,which further explains the important application of flexible transparent electrodes in the preparation of flexible OSCs devices.(2)The method of preparing AgNWs/PH1000 composite electrode without modification layer and with PH1000 modification was investigated,and the optical and physical properties of the electrode in the visible region were studied.The effects of the PH1000 modification layer on the morphology of the composite electrodes were investigated.On this basis,the flexible devices were prepared with PM6:Y6 as the photoactive layer,and the effects of the above electrodes on the properties of the active layer morphology and the optimization of the device performance were investigated respectively,and the device efficiency of up to 12.71% could be achieved with AgNWs as the flexible transparent electrode.It provides a valuable reference for promoting the development of flexible organic solar cell devices.