A multicolour bistable electronic shelf label based on intramolecular proton-coupled electron transfer

Area of Science:

• Materials Science
• Optoelectronics
• Electrochemistry

Background:

• Bistable electrochromic materials offer energy-efficient display solutions.
• Current limitations in electrochromic processes hinder ideal multicolour display development.

Purpose of the Study:

• To design and develop a high-performance bistable electrochromic device.
• To overcome limitations in existing electrochromic display technologies.

Main Methods:

• Utilized concerted intramolecular proton-coupled electron transfer.
• Engineered a novel bistable electrochromic device architecture.

Main Results:

• Achieved bistability over 52 hours and reversibility exceeding 12,000 cycles.
• Demonstrated high coloration efficiency (≥1,240 cm² C⁻¹) and transmittance change (70%).
• Enabled fast switching (≤1.5 s) for black, magenta, yellow, and blue displays, including a multicolour shelf label.

Conclusions:

• The developed device exhibits superior performance metrics for bistable electrochromic displays.
• The proton-coupled electron transfer approach provides a viable pathway for advanced display technologies.
• Design principles may extend to other optoelectronic applications.