Mixed Nanostructured Ti-W Oxides Films for Efficient Electrochromic Windows. (20th June 2012)

• Record Type: Journal Article
• Authors: Dinh, Nguyen Nang; Ninh, Dang Hai; Thao, Tran Thi; Vo-Van, Truong
• Other Names: Singh Jai Academic Editor.
• Is Part Of: Journal of nanomaterials. Volume 2012(2012)
• Publication Date: 2012-06-20
• Subjects: Nanostructured materials -- Periodicals; Nanotechnology -- Periodicals; Nanomatériaux; Nanostructured materials; Nanotechnology; Nanostructures; Nanotechnology; Periodicals; Fulltext; Internet Resources; Periodicals; 620.115
• DOI: 10.1155/2012/781236
• Languages: English
• ISSNs: 1687-4110

Abstract

Abstract : With the aim to enhance the electrochromic (EC) efficiency and electrochemical stability of electrochromic devices (ECD), mixed nanostructured TiO2 /WO3 films were prepared by an electrochemical deposition method with the purpose of adding WO3 nanoparticles to porous nanocrystalline doctor-blade TiO2 (nc-TiO2 ) films. The results of the characterization of electrochromic properties in 1 M LiClO4 + propylene carbonate (LiClO4 + PC) of both the nc-TiO2/F-doped tin oxide (FTO) and WO3 /TiO2 /FTO configurations showed the reversible coloration and bleaching of the ECDs. The response time of the ECD coloration of WO3 /TiO2 /FTO was found to be as small as 2 sec, and its coloration efficiency (CE) as high as 35.7 cm 2 × C −1 . By inserting WO3 nanoparticles into the porous TiO2 structures, WO3 /TiO2 heterojunctions were formed in the films, consequently enabling both the CE and electrochemical stability of the working electrodes to be considerably enhanced. Since a large-area WO3 /TiO2 can be prepared by the doctor-blade technique followed by the electrochemical deposition process, mixed nanostructured Ti-W oxides electrodes constitute a good candidate for smart window applications, taking advantage of the excellent coloration and stability properties as well as the simple and economical fabrication process involved.