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样例:新型有机光折变材料的合成及载流子陷阱表征方法研究

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    新型有机光折变材料的合成及载流子陷阱表征方法研究光折变效应是一种很有意义的非线性(NLO)现象。1967 年被发现以来,由于其在光放大、高密度数据存储、相共轭、全息图像加工方面的潜在应用而受到人们的重视。自从1991 年第一次在聚合物薄膜中观察到光折变效应后,立刻引起了人们极大的兴趣。聚合物的光折变效应有着不同于无机晶体的特征,在聚合物中,光生载流子的量子效率、电荷迁移率都依赖于电场,而无机晶体的量子效率则与电场无关。在研究方面聚合物光折变材料也具有明显的优势,如具有大的非线性光学系数、高的光学损伤阈值、低的直流介电常数、易于制备成膜、价格低廉等优点,这一课题的研究得到了飞速的发展。在过去几年中,全新的有机光折变聚合物体系相继大量涌现。尽管对于聚合物光折变材料的宏观研究现阶段已经有了长足的发展,到目前为止对光折变聚合物中光敏剂、电荷输送部分和电光分子的认识比较清楚, 而由于结构与组成的复杂性唯独对陷阱态及极化弛豫过程的研究没有系统进行, 陷阱机制及微观过程还不清楚, 表征方法也不完善, 极大限制了光折变聚合物的深入研究和应用。 本课题正是针对这一问题展开研究, 利用非等温技术方法,即热激电流( TSC), 热发光( TL), 并结合介电谱对光折变聚合物中的载流子陷阱中心和极化驰豫过程进行研究。本文的主要工作是:首先对传统热发光和热激电流测量装置的电极系统进行了改进,使其在换取样品,液氮流动、冷却速度等方面都有了很大提高;摸索了较适合于热激实验的成膜方法;合成了一种新型的有机光折变材料硝基偶氮苯接枝PVK,并对其做了红外谱表征;合成了生色团物质5OCB,找到 PVK/5OCB/C_(60) 的最佳配比为49.8:50:0.2,并对该体系做了初步的光学测试。

错误译文

     Photorefractive effect is a very meaningful nonlinear optic (NLO) phenomenon. Because of its potential application in optics amplification, high density data storing, phase conjugation, hologram image processing etc photo-refraction has been paid lot of attention as soon as its discovery in 1967. As the polymer photorefractive effect was first observed, it immediately aroused people’s great interest. Comparing with inorganic crystal, polymer photo-refraction has its own characteristics. In polymer photo-induced carrier quanta efficiency and charge transfer are dependent on applied electric field. But in the inorganic crystal this is not the case. Polymer photo-fraction materials have obvious advantages in research too, such as greater NLO coefficient, high optical damage threshold, and low dielectric constant, easily to be formed into many kinds of films and low cost etc. so the research of this subject has got great development at full speed. In the past years many brand-new organic photo-refraction polymer systems have emerged. Though the macroscopic research to polymer photo-refraction materials has already got considerable development-up till now the photosensitize, electric charge transport and electro-optics molecule have been known very clearly, the systematic research of trap state, polarization and relaxation process has not done yet. Moreover, the trap mechanism and microcosmic process have not been clearly understood, and characterization methods not perfected, which is restricting the deeper research and application of photo-refraction polymer. Applying nonisothermal technology-thermally stimulated depolarization current (TSDC or TSC), thermoluminescence (TL) and dielectric spectroscopy, we try to do some research of carrier trap center and relaxation process of photo-refraction polymer. In the paper, the electrode system of the original TL/TSC measurement instrument is improved, which greatly facilitates sample exchange and increased liquid nitrogen’s running and cooling speed. Through long time and repeated practice we finally find an effective method to prepare films. We’ve synthesized a new kind of organic photo-refraction material nitryl azobenzene grafting PVK and characterized it with IR spectra. We’ve also synthesized 5OCB and found the optimal mass ratio of PVK/5OCB/C60-49.8:50:0.2, and given the two-beam coupling testing result.

修改后译文

     Photorefractive effect is a very meaningful nonlinear optical (NLO) phenomenon, which can be explored by synthesis of photorefractive organic material and carrier trap characterization. Since it was discovered in 1967, more and more concerns have been shown on it because of its potential application in optical amplification, high density data storage, phase conjugation, hologram image processing, etc. The photorefractive effect was first observed in polymer in 1991, which immediately attracted people’s great interest. Comparing with inorganic crystal, photorefractive effect in polymers has its own characteristics. In polymer, quantum efficiency and charge transfer of photo-generated carrier are both dependent on applied electric field. But the quantum efficiency of inorganic crystal has nothing to do with the applied electric field. Polymer photorefractive materials have obvious advantages in research, too, such as large NLO coefficient, high optical damage threshold, and low dielectric constant, easily being formed into films and low cost, etc., and the research of this subject has achieved fast development. In the past few years, many brand-new organic photorefractive polymer systems have emerged. Though the macroscopic research

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