Study On Application Of FA_1-xMA_xPbI₃ Perovskite Material In Carbon-based,Hole-conductor-free Solar Cells

Thescientificcommunityspendonlysevenyearsincreasingthe organic-inorganic hybrid perovskite solar cell photoelectric conversion efficiency from the initial 3%to the current 22.1%.The related work of perovskite solar cells was evaluated as one of the 10 major scientific breakthrough in 2013 by the Science,this evaluation is sufficient to demonstrate the perovskite solar cell has a high research value.In this paper,the preparation of the optical absorption layer material suitable for PSCs was studied and applied to the perovskite solar cells with no-hole-transport layer structure.The influence of the thickness of the frame layer on the cell performance was also studied.The specific content is as follows.The organic-inorganic hybrid perovskite FAPbI₃ was synthesized by one-step solution method and used it as light absorbing material in the perovskite solar cells in both planar-based and mesoporous-based structures.And the device does not contain the hole transport material,we used the low cost of carbon as the counter electrode of the cell.When tested under a standard solar condition,we obtained the highest photoelectric conversion efficiency of 9.36%of the mesoporous-based structured perovskite solar cells and the highest photoelectric Conversion efficiency of 6.84%of the planar-based structured perovskite solar cells.The scanning electron microscopy,XRD,AFM and water contact angle tests show that the cells corresponding to the 480nm mesoporous layer are superior than the non-mesoporous layer in open circuit voltage,short circuit current density,photoelectric conversion efficiency and fill factor.The main reasons are the enhanced absorption of the UV-visible spectrum and the improvement of the internal composite resistance of the cell.Carbon material is an ideal material for electrode,which is advantageous not only in that it is inexpensive,but also in its work function close to the gold electrode,it also has a greater effect on the improvement in the water stability of the cell.The organic-inorganic hybrid cationic perovskite material FA_1-xMA_xPbI₃ was synthesized by one-step solution method.We optimized the ratio of cations in the perovskite precursor solution?x=0.2,0.4,0.6,0.8?.We synthesized the high quality perovskite crystal film by the anti-solvent method and used as the light absorbing layer material in the TiO₂/ZrO₂ double-frame structure solar cells,and the device does not contain hole transport materials,and the low-cost carbon is used as the counter electrode of the cell.When x=0.6,we obtained carbon-based perovskite solar cells which the photoelectric conversion efficiency is up to 10.55%.The effects of different proportions of cationic perovskite materials on the photoelectric properties of the devices were investigated by UV-Vis spectroscopy,XRD,scanning electron microscopy and other methods.The organic-inorganic hybrid perovskite material FA_0.4MA_0.6PbI₃ was synthesized by one-step solution method and used as a light-absorbing layer material in perovskite solar cells containing TiO₂/ZrO₂ double-frame structure,and the device does not contain hole-transporting materials,with low-cost carbon as the counter electrode of the cell.We studied the effect of the thickness of the frame layer on the photoelectric properties of the cell.When the thickness of the frame layer was 500 nm,the cell efficiency is up to 11.33%.We investigated the effect of different thickness of the frame layer on photoelectric properties of the devices by UV–Vis spectroscopy,XRD,scanning electron microscopy and other methods.