Study Of Hole Transport Layer Prepared By Evaporation Method And Its Application In Perovskite Solar Cell Module

In recent years,organic-inorganic hybrid perovskite solar cells?abbreviated as perovskite solar cells?have been studied in the photovoltaic field because of their high light absorption coefficient,large carrier mobility,and long excitons excellent photoelectric performance such as diffusion distance and adjustable bandwidth.Solar cells with perovskite materials as the light-absorbing layer have the advantages of low cost,high efficiency,and simple preparation,and have become the research hotspot in the field of solar cells.As of 2019,the internationally certified photoelectric conversion efficiency of perovskite solar cells has reached 25.2%,and is considered to be the most promising new-type solar cells.As the light absorption layer,the film formation quality and transmission performance of the perovskite thin film determine the quality of the solar cell device.The hole transport layer and electron transport layer,which are also functional layers,also affect the deviceperformance for the extraction and transmission of carriers.In addition,as a competitor to traditional silicon-based solar cells,commonly used preparation methods such as laboratory spin coating methods are not suitable for industrial production.Therefore,exploring a method for preparing a stable and suitable for commercial production of perovskite solar cells has become a current research hotspot.This paper mainly adopts a method of vapor deposition-flash evaporation to prepare perovskite thin film.In the process of preparing perovskite thin film,the post-annealing time is optimized.And a method of obtaining hole transport layer by evaporation is designed.The test results show that compared with the traditional hole transport layer PEDOT:PSS,the new hole transport layer has a certain improvement in electrical conductivity,carrier transport capacity and transmittance,which in turn improves the device performance and stability.After studying the carrier transmission kinetics and the recombination mechanism,a large-area perovskite solar cell rigid and flexible module device was prepared,and excellent device efficiency was achieved.The specific research contents and conclusions are as follows:?1?Preparation of MAPb I₃ film based on the evaporation-flashing method as the light absorption layer of perovskite solar cell:using MAPb I₃ film obtained by first vapor-depositing a layer of Pb I₂,then flashing excess MAI,and after annealing treatment The utilization rate of raw materials is much higher than the spin-coating method.?2?By co-evaporating 2T-NATA and F4-TCNQ methods,a new hole transport layer was constructed.By controlling the co-evaporation rate ratio to achieve different amounts of F4-TCNQ doping,based on this,the device was prepared and compared with the traditional Compared with the standard device based on PEDOT:PSS hole transport layer,the performance and stability of the prepared device have been improved.?3?Based on the method of preparing perovskite thin film based on h-HTL and vapor deposition-flash evaporation,a 16 cm² fully-evaporated large-area perovskite battery module was prepared.The photoelectric conversion efficiency of the module is 15.06%,and the conversion efficiency of the flexible device has reached 13.15%.