The study of the multi-layered structure of electrochromic devices

• Main Authors: chen long xiong, 陳龍雄
• Other Authors: Wang Ding
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/44895400358523566075

碩士 === 國立勤益科技大學 === 機械工程系 === 101 === This study explored manufacturing process and characteristics of electrochromic devices. Electrochromic device structure of the glass substrate, a conductive layer, a color layer, an electrolyte layer. According to the different electrolyte layer, electrochromic devices can be divided into liquid, colloidal, thin film solid-state device. This study, using a vacuum sputtering machine manufacture electrochromic device layers,and using UV spectrophotometer measure the transmittance, and compare the electrochromic coloring rate. This study was divided into three parts. In the part one study: Discoloration of the conductive layer by different ions, experimental results showed that the conductive layer of indium tin oxide thin film doping lithium-ions, sodium-ions, potassium-ions may become coloring state, indium tin oxide films exhibited yellow after doping lithium-ions, indium tin oxide films exhibited dark brown after doping sodium-ions or potassium-ions. The coloration efficiency of potassium-ions is batter than sodium-ions, and the light transmittance is low. But the use of indium tin oxide thin film electrochromic reaction of life is very poor, with only react to color three to five times. In the part two study: Lithium perchlorate propylene resin solution changed to aqueous solution of lithium perchlorate that conventional electrolyte layer used, Explore the process discoloration rate and coloring efficiency effect of thin film solid state devices doping ions in aqueous electrolyte. Experimental results show that using aqueous electrolyte in the thin film solid state devices manufacturing process can speed up the devices coloring efficiency and the coloring rate creased. In the part three study: For the color layers, using vanadium pentoxide and Tungsten trioxide make a bilayer structure for the electrochromic devices changing color with yellow, green and blue. Experimental results show that the outer coating layer of the vanadium pentoxide thin film of tungsten trioxide can be avoided the problem that pentoxide film dissolved when doping ions. This layer structure device thus prepared as a bright yellow pentoxide film and the transparent tungsten trioxide film, then the naked eye as a yellow component. For the electrochromic reaction, it can use a low voltage-1.5V to promote outer transparent tungsten oxide film is colored light blue, and the underlying thin film of vanadium pentoxide bright yellow overlap device shows the naked eye green; And then subjected to a high voltage -2.5V moved the ions into the tungsten trioxide and vanadium pentoxide thin films of tungsten trioxide films completely. Procure tungsten trioxide film is colored dark blue, while the underlying vanadium pentoxide film decolourized as transparent gray, and the device shows the naked eye blue. With this two-tier structure so as to realize the characteristics of the electrochromic device yellow, green, gray, dark blue and black multicolor conversion. The results showed that ITO conductive glass having discoloration, but still need to improve component life; while an aqueous solution of sodium ions embedded thin film solid state devices can improve the coloring rate; component in the liquid layer can effectively render color yellow blue three more colors conversion.