(Invited) Electrochemistry of Transition Metal Oxide Based Mountable Electrochromic Devices. (9th April 2018)

• Record Type: Journal Article
• Authors: Deb, Biswapriya; Gayathri, P TG; Sajitha, Surendran
• Is Part Of: ECS transactions. Volume 85:Number 7(2018)
• Page Start: 91
• Page End: 105
• Publication Date: 2018-04-09
• Subjects: Electrochemistry -- Periodicals; Electrochemistry; Periodicals; Electronic journals; Electronic journal; 541.37
• DOI: 10.1149/08507.0091ecst
• Languages: English
• ISSNs: 1938-5862

Abstract

Abstract : Although electrochromic (EC) "smart" windows are recently making inroads into consumer applications, any large-scale usage needs further maturity in balancing their cost, processability and usability. In this work, we demonstrate the use of ultraviolet (UV, 365 nm) photoannealing process for transition metal oxides (TMOs) specially optimized to support flexible ECD operations. This inexpensive and facile process step enabled us to manipulate nanoscale transport properties to extract preferred functionalities. Significant network densification is observed as photodecomposition of bridging ligands facilitated direct interactions of surface dipoles in those films that produced ~57% improvement in the optical density (OD). The free-standing SPEs were designed by dispersing Li-salts into polymer matrix followed by thermochemical crosslinking of the host. The assembled ECDs were investigated using electrochemical and spectroelectrochemical techniques to identify the sources of device degradations. A typical device fabricated with optimized components showed remarkably high OD (~0.65) and coloration efficiency (CE) ~122 cm 2 /C at 600 nm.