Study On The Preparation Process Technology Of Inverted Planar Heterostructure Perovskite Solar Cell

Since 1956,scientists Kojima first use organic inorganic hybrid electrolyte make perovskite solar battery and got 3.8%of the photoelectric conversion efficiency,perovskite battery system get extensive attention by the industry.At present,the maximum photoelectric conversion efficiency is over 22%,In essence,it is derived from the structure of the solar cell device,the optimization design of the materials and the improvement of the film quality.In this paper,the experimental system is inversion structure p-i-n type organic inorganic hybrid perovskite solar cells,The preparation process was systematically explored.The solution configuration method of cavity transport layer,perovskite photoactivation layer and electron transport layer is explored respectively,The influence of the key experimental parameters on the photovoltaic performance of the device.The results are as follows:1?Study on the preparation technology of the hollow transport layer of perovskite batteries.Compared the PEDOT:PSS at room temperature and refrigerated cases.The difference between the discovery of PEDOT:PSS material can gain higher device efficiency under refrigeration.Studied at the same time the use of PEDOT:PSS and PTAA two materials as a hole transport layer.Found increased after the PTAA.Perovskite need to lower the proportion of the precursor solution.This is due to the hydrophilic MAI on hydrophobic PTAA film need to reduce the dosage.Through adjusting the thickness of the solution concentration to obtain appropriate PTAA.And in the film doped with small amounts of F₄-TCNQ film conductivity.Eventually got 18.2%of the photoelectric conversion efficiency.The new synthesized new material 1,4-bis?3,6-di?naphthalen-2-yl?-9H-carbazol-9-yl?butane is used as the hole transport layer for the perovskite solar cell.The preparation process of the thin film and perovskite thin film was studied systematically.The results show that.1,4-bis?3,6-di?naphthalen-2-yl?-9H-carbazol-9-yl?butane can be used as the cavity transport layer.The open circuit voltage,photocurrent and filling factor are significantly reduced.It is indicated that the film conductivity and film-forming properties need to be improved.In this paper,the highest occupied orbital energy level of the material is matched with MAPbI₃.The two-layer cavity transport layer with PEDOT:PSS is designed.It was found that the efficiency increased obviously,and obtained 15.9%photoelectric conversion efficiency.2?Study on the preparation process of the perovskite thin film of MAPbI3.The configuration method of precursor solution was studied respectively.Rapid crystallization process parameters of secondary butanol solvent extraction.In addition,Compared with the air environment and nitrogen environment.The difference between the formation parameters of perovskite?precursor proportion and baking parameters?.The related mechanism is studied preliminarily.Finally,based on PEDOT:PSS obtained 16.2%photoelectric conversion efficiency.Compared with previous use of PEDOT:PSS materials have been greatly improved.3?The PCBM electron transport layer preparation technology has studied the influence of PCBM rotation speed and substrate temperature on device performance.We find out by morphology.The enhancement of the base temperature can improve the adhesion of PCBM on the surface of perovskite films.Significantly improve the flatness of the film.Therefore,the leakage current of the device decreases.The fill factor increases.Finally,it gets better efficiency.