本文關鍵詞： 電致變色 三氧化鎢 錳酸鋰 薄膜 光學調(diào)制范圍 多重變色　出處：《浙江大學》2017年碩士論文　論文類型：學位論文

【摘要】：電致變色材料由于其變色電壓低、顏色變化多種多樣、節(jié)能環(huán)保等優(yōu)勢,在靈巧智能窗、電子紙、電致變色顯示器、智能穿戴材料等領域有著廣泛的應用前景。但對于無機電致變色薄膜材料仍存在光學調(diào)制范圍小、變色速度慢、循環(huán)穩(wěn)定性差、顏色變化單一、著色效率低等缺陷,為此本文研究了 WO3和LiMn2O4兩種薄膜材料,相關實驗主要分為兩個部分,首先是改進WO3的制備方法以改善電致變色性能,其次是探索了 LiMn2O4電極材料作為新型電致變色材料。具體實驗結果如下:(1)采用單層種子層旋涂法結合水熱法制備出h-W03納米線薄膜,并研究了乙二醇的加入對其電致變色性能的影響。結果顯示,乙二醇的加入能大幅地增加其光學調(diào)制范圍,在633nm處的光學透過率變化可達82.6%,對于620～900nm波長范圍的光可近似認為完全吸收,而且具有相當?shù)闹屎拖喈數(shù)淖兩俾?這對于WO3薄膜應用電致變色節(jié)能窗具有重要意義;(2)采用溶膠-凝膠提拉法制備出無定形的LiMn2O4薄膜,并研究了乙醇和1.5-戊二醇作為添加劑對其成膜性能和電致變色性能的影響。結果顯示,乙醇和1,5-戊二醇的加入均能有效地提高LiMn2O4薄膜的成膜性能,其中乙醇作為添加劑制備的LiMn2O4薄膜還具有出色的電致變色性能,具體來說在460nm處的光學透過率變化可達43.4%,著色、褪色時間分別為2.6s和1.9s,著色效率為50.8cm2.C-1而且擁有多階段、多色態(tài)的顏色變化,能在無色、黃綠色和橙黃色之間變化,由于其變色前后只在藍紫色波段由明顯的吸光度變化,在紅外波段則保持較高的透過率,這對于LiMn2O4薄膜應用于信息檢測、電致變色顯示器領域,以及制備無機多重電致變色材料具有重要意義。
[Abstract]:Electrochromic materials, due to their low color voltage, variety of color, energy-saving and environmental protection, in smart smart windows, electronic paper, electrochromic display, Intelligent wearable materials and other fields have wide application prospects, but for inorganic electrochromic thin films, there are still some defects such as small optical modulation range, slow color changing speed, poor cycle stability, single color change, low coloring efficiency, etc. In this paper, two kinds of thin film materials, WO3 and LiMn2O4, are studied. The related experiments are divided into two parts. Firstly, the preparation method of WO3 is improved to improve the electrochromic properties. Secondly, the LiMn2O4 electrode material as a new electrochromic material was explored. The experimental results are as follows: (1) the h-W03 nanowire film was prepared by single layer seed layer spin coating method combined with hydrothermal method. The effect of the addition of ethylene glycol on its electrochromic properties was studied. The results show that the addition of ethylene glycol can greatly increase the optical modulation range. The optical transmittance at 633nm can vary by 82.6. For the wavelength range of 620nm, the optical transmittance can be approximately considered to be completely absorbed, and it has a considerable coloring efficiency and a comparable chromotropic rate. This is of great significance for the application of electrochromic energy saving windows to WO3 thin films. (2) amorphous LiMn2O4 thin films are prepared by sol-gel Czochralski method. The effects of ethanol and 1. 5-pentanediol as additives on the film forming and electrochromic properties of LiMn2O4 films were studied. The results showed that the addition of ethanol and 1 pentanediol could effectively improve the film forming properties of LiMn2O4 films. The LiMn2O4 film prepared with ethanol as additive also has excellent electrochromic properties. Specifically, the optical transmittance at 460 nm can change to 43.44.The fading time is 2.6 s and 1.9 s, respectively, and the coloring efficiency is 50.8 cm2.C-1 and has many stages. The color change of polychromatic state can change between colorless, yellowish green and orange-yellow, because its color changes only by obvious absorbance in the blue-purple band before and after its discoloration, and maintains a high transmittance in the infrared band. This is of great significance for the application of LiMn2O4 thin films in information detection, electrochromic displays and the preparation of inorganic multiplex electrochromic materials.
【學位授予單位】：浙江大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TB383.2

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本文編號：1504607