Efficient Preparation Methods Of New Functional Polysulfate Materials And Their Application Research In Electrical Memory Devices

In recent years,with rapid development of science and technology,the development di-rections of polymer materials are divided into two branches primarily.On the one hand,many scientists are focused on the functional polymer materials,which is the innovation from traditional materials.The present research focus is mainly on the electro-optical prop-erties(such as OLED,OPV,OFET)of high added value.On the other hand,the increase of traditional materials' basic properties is also the focus study.It is largely based on the simple modification of the original materials.Certainly,there are a few similar to the optimization of chemical structure in this paper.The optimization of chemical structure can improve me-chanical properties,thermal stability,and electro-optical properties effectively.This paper mainly discuss a kind of new functional polysulfate efficient preparation method and its ap-plication in electrical memory devices.The material preparation method is SuFEx Click Chemistry.Compared with traditional polycarbonate(PC),polysulfate has better thermal stability,better aging resistance and better resistant to acid and alkali corrosion resistance,etc.The preparation method of this kind of material is more moderate and universal,can be performed in simple experiment conditions.It is very conducive to large-scale industrial production.Based on this,this paper adopts the SuFEx Click Chemistry synthesis method to prepare these polysulfate materials.By studying the structure of polymer,chain confor-mation,metal coordination effect on the performance of electrical storage,we try to realize the regulation of the polysulfate electrical memory performance.This paper mainly works from the following several chapters:(1)Colorless polysulfates:preparation and applications in transparent resistive memory materials.In this paper,we chose two different precursors:4,4'-(phenylazanediyl)diphenol and bisphenol S.The precursors were used to synthesize associative monomers and polymers(homopolymers:BPS-PS,TPA-PS;copolymer:BPSTPA-PS)by the click method described above.These two precursors were non-planar conjugate structures that have different elec-tronic properties.We studied the memory performances of these polysulfates as nanoscale middle layers in classical sandwich-type memory devices and found that ITO/BPS-PS/Al,ITO/TPA-PS/Al,and ITO/BPSTPA-PS/Al devices displayed DRAM,WORM,and FLASH effects,respectively.These results suggested a wide application potential of poly-sulfates as functionalized materials.We believe these transparent memory materials will find applications in next generation electronic devices.(2)Electrical memory properties of novel polysulfates based on different dipole moment unit.Through SuFEx click chemistry,we prepared three new polysulfates(MHSF-PS,MOSF-PS and MZSF-PS).The three kinds of polymer synthesis is simple and convenient.The ITO/MHSF-PS/Al,ITO/MOSF-PS/A1 and ITO/MZSF-PS/Al devices respectively showed the binary WORM,FLASH and FASH effects.We probed their mechanisms intothe charge transfer and dipole moment effect through the theoretical calculation and the related test characterization means.(3)Electrical memory properties of nitrogen-containing polymers with different D-A structures.The electrical properties of the two side-chain polymers(PTPA-SuFEx-DMA and PA-m-Ph)were studied in this paper.We realized to regulate the performance of the polymer-based device by changing the different polymer structures.The result showed that the design of metal coordination or configuration changes in the traditional D-A structure can realize ternary performance.ITO/PTPA-SuFEx-DMA/A1 devices and ITO/PA-m-Ph/Al devices showed good nonvolatile ternary storage performance.We have explored the possible dual internal mechanisms.The research results provide a way for the study of the multi-level electrical memory performance.