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Based on inorganic nanocrystals / polymer composite thin film research bistability

Author: LiuJie
Tutor: ZuoFeng
School: Beijing Jiaotong University
Course: Condensed Matter Physics
Keywords: Nanocrystals / polymer composite films Electrical bistable device Cu2S Ag PVK
CLC: TB383.2
Type: Master's thesis
Year: 2011
Downloads: 28
Quote: 0
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Abstract


In order to overcome the development of inorganic semiconductor memory may reach the limit of development , development of new storage materials in the scientific community of extensive research in many new storage materials , organic materials due to collapse , low cost, high storage density of a material of great potential one , but with the development of science and technology , the nature of a single material has been behind the times the pace of development , composites become the development trend of modern materials . In recent years , with the inorganic nanomaterials synthesis and characterization of a breakthrough , the inorganic nanomaterials introduced into the polymer material to form an inorganic polymer matrix nanocomposites information storage science has increasingly become a research hotspot . In this paper we prepared dodecanethiol coated inorganic nanocrystals, and introduced into the polymer , prepared by spin coating method based on inorganic nanocrystals / polymer composite thin film electrical bistable device to study the device's electrical characteristics , and discusses the impact of electrical bistable device performance factors and the working mechanism of the device . Made by the main tasks include the following: 1 . Through one-step synthesis of dodecanethiol better dispersion coated Cu2S and Ag nanocrystals ; by transmission electron microscopy (TEM), X -ray powder diffraction (XRD) by means of the morphology and structure of nanocrystals were characterized ; 2 . use of organic polymer PVK doped Cu2S as a functional layer by spin coating method produced a structure of ITO / PEDOT: PSS / PVK: Cu2S/Al electrical bistable device , by changing the PVK: Cu2S the ratio of the concentration of the nanocrystalline Cu2S effect on the impact device and the thickness of the organic function layer , the scanning voltage range of the device performance, through experimental and theoretical final fitting of the device in the low conducting state charge transport modes. 3 . The Ag nanocrystals with polymer PVK composite , prepared by spin coating method based on Ag nanocrystals and PVK composite system structure ITO / PEDOT: PSS / PVK: Ag / Al electrical bistable device , were investigated PVK: Ag ratio of the concentration of different scanning voltage range of the device performance, and the use of theoretical and experimental phase fitting method to study the device in high or low conductivity state charge transport mode , and finally the physical mechanism of the device work carried out discussed.

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