The Application Of Double Inorganic Transport Layer In Organic Solar Cells

With the enhancement of human’s awareness of environmental protection,more and more people have noticed the impact and harm caused by environmental pollution.Research and utilization of new types of renewable energy have been valued by leaders of many countries,but how to use renewable energy efficiently Energy has always been a problem for researchers.Solar energy contains huge energy,and solar cells can effectively convert light energy into electricity,so research and scientific research on solar cells have never stopped.Because of the stable development and maturity of silicon elemental processing technology,inorganic solar cells have taken the lead in people’s attention.However,with the research and exploration in these years,the efficiency of silicon solar cells has approached the theoretical limit,so some researchers will focus on the research.There are many advantages and characteristics of organic solar cells,which are easy to prepare,low cost,flexible and wearable,and can be printed on a large area.The preparation of better organic solar cells has been the research direction of scientific researchers,but the research and development of organic solar cells The development is still in the laboratory stage,and its performance is very unstable,its absorption spectrum is narrow,light energy absorption is low,and its photoelectric conversion efficiency is low.It has been a problem that has plagued researchers.Therefore,it has overcome the above problems and improved organic polymer solar cells.The stability and efficiency are imminent.This paper will improve the photoelectric conversion efficiency of organic polymer solar cells by reducing the carrier transport loss,improving the interface contact between the active layer and the transport layer,and reducing the resistance direction of the contact surface.The organic solar cell system of ITO/TiO₂/PTB7:PC₇₁BM/MoO₃/Ag used in this paper analyzes the defects and problems of traditional single hole transport layer molybdenum trioxide,such as the energy level matching span of the active layer is too large.Leading to the annihilation of holes in the process of transport,through reading the literature,successfully found a small inorganic copper bromide,and by vacuum evaporation method,successfully the copper bromide and molybdenum trioxide hole transport layer Combined to make a double inorganic composite hole transport layer,the composite layer has better energy level matching,which makes it easier and more stable to transport holes to the silver electrode.Thereby obtaining higher efficiency of photoelectric conversion.The organic solar cell system of ITO/TiO₂/PCDTBT:PC₇₁BM/MoO₃/Ag used in this article,by analyzing the problems and defects in common single-electron transport layer titanium dioxide,by consulting the data and literature,successfully another The combined electron transport material cesium carbonate and the existing transport material titanium dioxide form a double inorganic composite electron transport layer.The double inorganic electron transport layer improves the interface defects of a single transport layer,reduces the impedance between the interfaces,and improves Contact between the active layer and the transport layer.As a result,the active layer has a better phase separation,and the donor material and the acceptor material are in closer contact,which increases the efficiency of the organic polymer solar cell by 28.7%.Finally,we successfully applied the dual inorganic composite layer to the carrier transport of organic polymer solar cells.By using the composite layer,the poor contact between the original active layer and the single carrier transport layer was improved.The disadvantages and limitations caused by the original single carrier transport layer are reduced,so the efficiency of photoelectric conversion is improved.