Visualization of energy: light dose indicator based on electrochromic gyroid nano-materials

Area of Science:

• Materials Science
• Electrochemistry
• Optoelectronics

Background:

• Standard electrochromic devices have slow coloration, limiting applications.
• Aqueous electrolytes in electrochromic devices cause stability issues like water splitting and gas evolution.

Purpose of the Study:

• To design a reusable, self-powered light dose indicator.
• To leverage the efficient coloration of gyroid materials for cumulative charge measurement.
• To overcome stability issues using novel electrolytes.

Main Methods:

• Developed a self-powered light dose indicator with a solar cell and a gyroid-structured nickel oxide (NiO) electrochromic display.
• Investigated a nano-gyroid NiO electrochromic device using organic solvents and a room temperature ionic liquid (RTIL) ([SET3][TFSI]).
• Assessed device performance and stability, focusing on solvent degradation and gas generation.

Main Results:

• The gyroid-structured NiO electrochromic display efficiently utilizes voltage-sensitive coloration for charge measurement.
• The novel nano-gyroid NiO device with RTIL demonstrates effective light dose indication.
• The device operates reliably without solvent degradation or gas generation, unlike traditional devices.

Conclusions:

• A reusable, self-powered light dose indicator based on nano-gyroid NiO and RTIL is feasible.
• This design overcomes the limitations of conventional electrochromic devices.
• The developed indicator offers a stable and reliable method for measuring cumulative light exposure.