Febrication And Photoelectric Conversion Performance Of Semitransparent Perovskite Solar Cells

In recent years,the photoelectric conversion efficiency?PCE?of perovskite solar cells?PSCs?has been developed rapidly,and the latest photoelectric efficiency record has reached an amazing 23.3%.As the battery efficiency record approaches,more research results on perovskite batteries are emerging,covering optimization of structural design,working mechanism,preparation process and social application.Among them,as a new research direction,semitransparent PSCs have a great application prospect.,For example,building wall surface or on the surface of the glass,energy device and digital electronic products,car windshields,outdoor and household devices?such as glazing,shutter shade?,are able to generate electricity,as well as pervious to rational utilization of energy,especially suitable for making high efficiency blue,ultraviolet light and detector and tandem solar cells,etc.In this paper,the perovskite layer,carrier transport layer and transparent electrode are innovatively improved,and finally hope obtained semitransparent PSCs with excellent performance.Firstly,we improve the stability of perovskite thin films by cation doping,and regulate the thickness of perovskite thin films.Then,the influence of zinc doping on the light transmission and electrical conductivity of nickel oxide film?NiO_x:Zn?was studied,and the application of doped nickel oxide film as the hole transport layer of solar cells was explored.Finally,we explored the transparent conductivity of Cu and Au metal electrodes with different structures,and explored the application of transparent electrodes in translucent perovskite solar cells.The main research results are as follows:1.The thickness and stability of perovskite film have an important impact on the performance of devices.In this paper,cesium cation doping strategy is adopted to improve the stability of the perovskite layer and the whole solar cell.Cs doped MAPbI₃ obtained Cs_xMA_1-xPbI₃ films with strong light transmittance and good photoelectric performance by adjusting the thickness of perovskite layer,and the optimal film thickness was 250-270 nm,laying a foundation for the research of semitransparent PSCs.2.The influence of Zn doped NiOx film on transparent conductivity was explored.It is found that compared with the original film,the transparent conductivity of zn-doped NiO_x film is greatly improved.Zn forms effective acceptor in NiO_x film,and the hole concentration increases obviously.Finally,a hole transport layer film with high conductivity,high power function and high light transmittance is obtained.NiO_x:Zn thin film is used as the hole transmission layer of perovskite solar cell.The open circuit voltage and short circuit current of the solar cell have been significantly improved.The optimal short circuit current density of the solar cell is 22.8 mA·cm^-2,the open circuit voltage is 1.1 V,and the filling factor is 78%.Finally,the photoelectric conversion efficiency of the solar cell reached 19.6%.3.The transparent conductive properties of Au and Cu metal-based electrodes were studied and applied to semitransparent PSCs.Single metal layer,Au/Cu double metal layer and D/M/D multiple transparent film were used as the electrodes to study the photoelectric conversion performance of the semitransparent PSCs.The study found that Au/Cu double metal layer transparent electrode achieved an satisfactory 66%transmittance,film sheet resistance as 27?/sq,it made a guarantee to the light transmittance of the semitransparent PSCs.Compared with the photoelectric conversion efficiency of 18.1%of the original opaque PSCs,the photoelectric conversion efficiency of the metal-based transparent perovskite solar cell measured from FTO surface illumination is 16%,while that from the transparent metal surface illumination is 12.2%,and the average light transmittance of the PSCs reaches 31%.