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The Influence of Stress on the Optical and Electrical Properties of Nanocrystals

Author: ChuJianGen
Tutor: YuanCaiLei
School: Jiangxi Normal University
Course: Optics
Keywords: Nanocrystalline Dielectric material Photoluminescence Stress Defect
CLC: TB383.1
Type: Master's thesis
Year: 2010
Downloads: 28
Quote: 0
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Abstract


Nanocrystalline embedded in the parent matrix is subject to significant stress . Explore nanocrystals in the growth process by stress in their optical and electrical properties of significance to the future technical applications . In this paper , two-dimensional finite element software ANSYS nanocrystals embedded in the growth process of the parent material dislocation due to thermal expansion of the strain distribution for simulation analysis . This article by using the pulsed laser deposition technique , several different nanocrystalline composite thin films were prepared using Raman spectroscopy ( Raman ) , transmission electron microscopy ( TEM ) and photoluminescence (PL) spectrum and CV detection technology on the deposition and annealed film surface morphology, microstructure , and optical properties were characterized and analyzed . Meanwhile, the large finite element calculation the software ANSYS10.0 simulation results , we found that the parent material and nanocrystalline materials Young's modulus and Poisson's ratio of different nanocrystal growth process , with nanocrystalline different maternal environmental in stress by size and nanocrystalline suffered the same maternal environmental stresses are different nanocrystal growth process , which led to the formation of some defects in its internal or at the interface to buffer this kinds of stress . Nanocrystalline by the greater the stress , the more defects generated . PL Results and CV characteristics indicate defects on the nanocrystal photoluminescence performance and electric storage performance has a direct impact .

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