Preparation Of New Carbon Composites And Their Application In Perovskite Solar Cells

As new 3rd generation solar cells,Recently Perovskite Solar Cells attracted researchers attention from all over the world,because its high photoelectric conversion efficiency,simple production process and easy to get the raw material.Traditional perovskite solar cells use precious metal materials?Ag,Au and Pt?as the electrode,and need to add HTM which stability is poor.Those materials are expensive,not conform the PSCs' future target--Large area and industrial production.Carbon materials advantages is diverse structures,stable chemical properties and rich surface chemical properties,at the same time Carbon materials price is low is abundant in the earth,and has same Fermi energy with Au;is a good choice to replace HTM materials and noble metal electrode.We use hydrothermal synthesis method to preparate new composite materials,and obtained a good application effect by use it as the electrode material in PSCs.Firstly,we made In_2.77S₄ material by hydrothermal synthesis method,by adding carbon black,conduct carbon and CNTs,got the In_2.77S₄/Cb,In_2.77S₄/Cc and In_2.77S₄/CNTs composite materials,Then using a simple spray method made PSCs cathode.The J-V test showed that the PSCs photoelectric properties of In_2.77S₄/CNTs is the best.On this basis,we made different mass ratios of In_2.77S₄ and CNTs,finding that the mass ratio of ln2.77S4 and CNTs is 1:4,the photoelectric property of PSCs was the best.we made a careful analysis of the performance parameters of In_2.77S₄/CNTs and CNTs,finding In_2.77S₄/CNTs electrode materials can improve the cell performance.the photoelectric conversion efficiency?PCE?reached 5.92%.And this cell's stability in the air environment,room light and 30%-55%humidity can keep more than 250 h.Secondly,we made attapulgite/Cc composites material by hydrothermal synthesis method,and analyzed its morphology and structure through XRD and SEM characterization.We used attapulgite clay,attapulgite composite materials/Cc and Cc as cathode in PSCs respectively,found that the photoelectric properties of the composite material got the best.The application of composite materials in different proportions in comparison in PSCs,when the ratio of attapulgite and Cc is 1:4,the photoelectric conversion efficiency up to the best 7.17%.At last,analysis of carbon electrode using the two isopropoxides acetyl acetone titanium?Ticac?compact layer effect on PSCs,and the effect of the ZrO₂ mesoporous layer respectively,then Ticac compact layer and ZrO₂ materials were characterized respectively.After adding the mesoporous layer,PSCs of Ticac enhanced the electronic collection and transmission ability of the perovskite.As a mesoporous layer,ZrO₂ was compared to the traditional TiO₂ mesoporous layer,the study found that the photoelectric performance of TiO₂-ZrO₂ electron transport layer can make better.