Self-made Carbon Slurry Is Used As The Counter Electrode Of PSCs And The Application Research Of Carbon Materials In QDSSCs

The development of high-efficiency solar cells as clean energy to meet the ever-increasing energy demand has been increased common concern.Recently,the three-dimensional perovskite structure corresponding to the crystals of halomethylammonium halide(CH3NH3PbX3,x= Cl,Br,I)and their mixed halides have been used in perovskite solar cell,which have adjustable band gap,large absorption coefficient,and high carrier mobility.However,precious metals such as Au or Ag as the PSCs counter electrode(CE)are not conducive to Large-scale commercial production.Because carbon materials have high conductivity,high storage capacity,low cost,and good stability in nature,which have become candidates for electrodes in perovskite solar cells.Quantum dots due to quantum size effect and multi-exciton effect have attracted the attention of researchers.Bi2S3 material has produced photoelectric conversion efficiency as a non-toxic material in quantum dot solar cells.So Bi2S3 quantum dot has a wide range of research in friendly energy.(1)In the air,commercial carbon paste was applied to the counter electrode of perovskite solar cell by the knife-coating method and obtained 7.6%efficiency.On this basis,the homemade carbon paste as the counter electrode of perovskite solar cell has obtained 7.97%efficiency.Using the sol method,different concentrations of fluorine-doped tin dioxide particles were used as a binder in self-made carbon paste,so the carbon material particles not only connecte the carbon material together but also determine the performance of the self-made carbon paste.Finally optimum concentration of fluorine-doped tin dioxide in self-made carbon paste has obtained 12.04%efficiency.XRD and SEM were used to characterize the perovskite films by two-step method.It was proved that the CH3NH3PbI3 films were successfully prepared in the air.The fluorine-doped tin dioxide particles were characterized by EDX and TEM,which have obtained composition and particle size.PL photoluminescence test was used to verify the perovskite carbon electrode function that photogenerated holes were extracted and transmitted to the external circuit.Through the J-V test,the impedance spectroscopy test have obtained homemade carbon paste as perovskite solar cell electrode contacted well.In the air,we use low-temperature homemade carbon paste to replace noble metals gold or silver and remove the hole transport layer.This will facilitate the commercialization of battery devices and provide a new direction for the study of low-cost,high-efficiency perovskite solar cells.(2)The deposition of CdS and Bi2S3 quantum dots on the TiO2 thin film by continuous ion-adsorbed reaction(SILAR)have received 0.41%efficiency.we also study the influence of the addition of ZnS passivation layer.On this basis,the carbon material was doped to improve the photoanode structure and obtained 1.22%efficiency.Quantum dots structure and size were obtained by XRD.J-V,EIS,OCVD study different photoanode interface structure.The results show that the interface contact resistance is reduced,thereby increasing the efficiency of the collection of electrons.