Gelatin-based solid electrolytes for chromogenic windows applications: a review

This paper reviews the use of gelatin as a solid biopolymer electrolyte with respect to its properties specifically for chromogenic device application. Recently, chromogenic devices have received significant attention due to their contribution for energy efficiency in buildings, automobiles, and aircrafts upon changing their redox state with switching ability. Especially, eco-friendly and cost-effective biopolymers, namely, gelatin, has received considerable interest as a solid electrolyte in the fabrication of chromogenic devices due to its high transparency, tackiness, and plasticity. The current comprehensive up to date review, glance the recent progress in solid-state gelatin-based electrolyte with a remarkable potential for photo/electrochromic smart windows.