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【摘要】：復(fù)合電致變色材料由于其較大的比表面積、較小的禁帶寬度以及直接的電子傳輸路徑等優(yōu)點成為越來越多研究者們關(guān)注的焦點。有機/無機、無機/無機復(fù)合都是改善單一材料電致變色性能的重要手段。本文所述實驗采用簡單的水熱法、水化學(xué)沉積和光沉積等方法制備了Viologen-ZnO、ZnO@NiO、Viologen-TiO_2、NiO-Ag復(fù)合電致變色材料,并對相應(yīng)材料和電致變色器件做出了一系列的表征和測試。具體內(nèi)容如下:(1)簡單水熱法制備ZnO納米管(棒)陣列,并用甲基紫精有機小分子對其修飾,從而制備Viologen-ZnO納米棒和納米管兩種復(fù)合型電致變色器件。實驗研究表明,由于ZnO納米管陣列比納米棒陣列具有更大的比表面積,能夠吸附更多的有機Viologen小分子,從而使更多的電致變色材料能夠加入可逆的氧化還原循環(huán)過程,提高了電致變色性能。(2)水熱法和水化學(xué)沉積法兩步制備ZnO@NiO核殼結(jié)構(gòu)復(fù)合材料,通過與純NiO電致變色薄膜相對比,ZnO@NiO展現(xiàn)出了更優(yōu)異的電致變色性能。由于ZnO@NiO核殼復(fù)合材料具有較小的禁帶寬度,有利于離子/電子在電致變色層的注入和抽出,從而增強了電致變色的光學(xué)調(diào)制范圍、響應(yīng)速度和著色效率等性能。(3)在FTO玻璃表面制備出不同厚度的TiO_2納米棒陣列薄膜,通過用有機小分子Viologen對其修飾,從而形成Viologen-TiO_2納米棒電致變色器件工作電極。本部分主要研究了TiO_2納米棒陣列薄膜的厚度以及電壓對電致變色器件的影響。(4)水化學(xué)沉積和光沉積法兩步制備NiO-Ag復(fù)合電致變色材料,Ag納米顆粒的復(fù)合提高了NiO-Ag電致變色器件的響應(yīng)速度等電致變色性能。Ag納米顆粒良好的電導(dǎo)性促進了電子在工作電極的傳輸,從而提高了電致變色器件的響應(yīng)速度。除此之外,我們對柔性全固態(tài)NiO-Ag電致變色器件也進行了一定的研究。
[Abstract]:Because of its large specific surface area, small band gap and direct electron transmission path, composite electrochromic materials have become the focus of more and more researchers. Organic / inorganic and inorganic / inorganic composites are important means to improve the electrochromic properties of single materials. In this paper, simple hydrothermal method, hydrochemical deposition and photodeposition were used to fabricate the composite electrochromic materials of Viologen-ZnOOPO-ZnOPO-ZnOPO-NiONiONiO-Ag. The corresponding materials and electrochromic devices were characterized and tested. The main contents are as follows: (1) ZnO nanotube (rod) arrays were prepared by simple hydrothermal method and modified with methylviolet organic small molecules to prepare Viologen-ZnO nanorods and nanotube composite electrochromic devices. The experimental results show that ZnO nanotube arrays have larger specific surface area than nanorods arrays, and can absorb more organic Viologen molecules, so that more electrochromic materials can be added to the reversible redox cycle process. The electrochromic properties were improved. (2) ZnO@NiO core-shell structure composites were prepared by hydrothermal method and hydrochemical deposition method. Compared with pure NiO electrochromic films, the electrochromic properties of ZnO@NiO core-shell composites were better than that of pure NiO films. Because the ZnO@NiO core-shell composite has a small band gap, it is advantageous to the implantation and extraction of ions / electrons in the electrochromic layer, thus enhancing the optical modulation range of electrochromic. Response rate and coloring efficiency. (3) TiO_2 nanorod array films with different thickness were prepared on the surface of FTO glass and modified with small organic Viologen to form the working electrode of Viologen-TiO_2 nanorod electrochromic device. In this part, the effect of thickness and voltage of TiO_2 nanorod array film on electrochromic devices was studied. (4) the composite of NiO-Ag composite electrochromic material, Ag nanoparticles, was prepared by hydrochemical deposition and photodeposition. The response speed of the photochromic device is equal to the electrochromic properties. The good conductivity of Ag nanoparticles promotes the transmission of electrons at the working electrode. Thus, the response speed of electrochromic devices is improved. In addition, we also study the flexible all-solid-state NiO-Ag electrochromic devices.
【學(xué)位授予單位】：南京郵電大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TB33;TN383.1

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本文編號：2149493