การสังเคราะห์ฟิล์มอิเล็กโทรโครมิกของทังสเตนไตรออกไซด์เจือลิเทียมวาเนเดตและท่อนาโนคาร์บอน

Abstract

This research aims to synthesize lithium vanadate / carbon nanotube co-doped tungsten trioxide electrochromic film by sol - gel method. Films were deposited onto a clean fluorine doped tin oxide substrate by dip coating method and then were annealed at 300 °C for 2 h. The studies were divided into two parts. For the first part, the synthesized tungsten trioxide films with 5, 10 and 15 by weight (wt.%) lithium vanadate. The electrochromic and transmittance properties of the films were determined from the cyclic voltammetry and UV-Vis spectrophotometer. It was found that the tungsten trioxide with 10 wt.% lithium vanadate film exhibited the highest diffusion coefficient about 2.6x10° cm'' and the highest of transmittance modulation about 54 % compared with pure tungsten trioxide films (41.7%). The second part, the tungsten trioxide films with 10 wt.% lithium vanadate doping with carbon nanotube at 0.05, 0.10 and 0.15 wt.%. The result showed that the 0.10 wt.% of carbon nanotube doping provided the highest diffusion coefficient and transmittance properties of 6.48x10° cm's' and 54.7 % respectively.