Preparation Of Doped TiO₂ Materials And Its Application On Perovskite Solar Cell

In recent years,the introduction of hybrid perovskite materials.The development of such batteries brought vitality.The photovoltaic efficiency exceeded 22.1% in a very short period.Recently,perovskite solar cell?PSC?has been focusing on because of its low cost,simple preparation.PSC mainly consists of electric transport layer?light absorption layer?hole transport layer and the gold of electrodes.As the carrier of electron injection and transmission,the electron transport material?ETL?has a great influence on the performance of PSCs.At present,the research hotspots of the researchers are basically the traditional P25 TiO₂ electron transport material,but this material has the following shortcomings on the PSCs: the electronic life is extremely short,the electrons and holes are easy in the perovskite composite,so the study of different ETL to improve the performance of PSCs is essential.Therefore,this article mainly launched the following three aspects:?1?A series of TiO₂ colloids were synthesized by replacing the P25 with different amounts of tetraacetate titanate as the titanium source,and the mixture was spin-coated on the conductive glass substrate as a highly efficient electron transport layer and assembled into PSCs.The experimental results show that when the content of acetylacetone is 15 m L,the photoelectric conversion efficiency of the battery is 16.75%,which is higher than that of the TiO₂ synthesized by using the traditional materials.The optimum photoelectric conversion efficiency is obtained by optimizing the different proportions of acetylacetone in the solution.The photoelectric conversion efficiency of PSCs is improved by 14.72%.?2?The nitrogen-doped TiO₂ nanocrystalline materials with diameter about 12 nm were prepared by hydrothermal method.The films were fabricated into FTO / TiO₂ / CH3NH3 Pb I3 / Spiro-OMe TAD / Au solar cells.Effect of Urea Content on Battery Performance during Preparation.When the urea content is 200%,the prepared TiO₂ photoelectrode has good electrical conductivity,and the simulated solar light is irradiated from the front of the battery with simulated light intensity of 100 m W /m2,which can make the photoelectric efficiency of PSCs reach 16.25%,compared with the traditional TiO₂ electron transport layer assembled batteries,the photoelectric conversion efficiency?solar front incident?increased a lot.The battery stability and repeatability testing,found that high stability,low decay rate.?3?TiO₂ nanospheres with high crystallinity and regular morphology were synthesized by hydrothermal method.The diameter of the films was about 13 nm,which was dissolved in ethanol solvent And homogeneously spin-coated on a clean sintered TiO₂ dense layer and assembled into PSCs.By changing the number of hydrothermal reactions and the temperature to obtain the best efficiency,it was found that when the two hydrothermal reaction temperatures were 180?,the highest efficiency was 17.09%.After placing it in the glove box for 240 h,the battery stability is good,indicating that the TiO₂ nanospheres are a kind of very promising mesoporous electron transport material.