Composite Structures of Tungsten Oxide/Titanium Oxide for Multi-Functional Smart Window Applications

• Main Authors: Ying-Ming Liu, 劉穎銘
• Other Authors: Bohr-Ran Huang
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/52216072884585259821

碩士 === 國立臺灣科技大學 === 光電工程研究所 === 101 === The purpose of this research is to combine the titanium oxide material with tungsten oxide material, and we analyze its characteristic of electrochromism and photocatalysis. In this work, the tungsten films were deposited on ITO substrate and prepared in reactive DC magnetron sputtering system. The as-deposited samples were subsequently subjected to thermal annealing in quartz tube furnace with a 2-step heat treatment. The tungsten oxide nanowires were synthesized self-catalytically on ITO substrate. Then the titanium films were deposited on the tungsten oxide nanowires. After that the as-deposited samples were subsequently subjected to thermal annealing in quartz tube furnace with a 2-step heat treatment. The TiO2/WO3 core-shell structure was synthesized finally. The electrochemical analysis shows the TiO2/WO3 core-shell structure have a high diffusion coefficient (8.6×10-10 cm2/s), fast electrochromic response time (coloration time 2.9s, bleaching time 0.8s), tremendous transmittance difference (36.57%), and beneficial ability of photodegradation. Furthermore, the tungsten films were deposited on ITO substrate and prepared in reactive DC magnetron sputtering system. Then the titanium films were deposited on the as-deposited samples. The TiO2/WO3 composite structure was finally synthesized by annealing the Ti/W films. The electrochemical analysis shows the TiO2/WO3 composite structure have a high diffusion coefficient (1.8×10-9 cm2/s), fast electrochromic response time (coloration time 5.1s, bleaching time 2.6s), tremendous transmittance difference (48.5%), and beneficial ability of photodegradation. . Therefore, the electrochromic device with the combination of titanium oxide and tungsten oxide will be suit for the development of energy-saving smart windows.