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An Electrochemical Cholesteric Liquid Crystalline Device for Quick and Low-Voltage Color Modulation

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Gel-Type Electrofluorochromic Devices for Advanced Optoelectronic Applications.

Xuecheng Wang¹, Lijing Wen¹, Jinxia Ren¹

¹State Key Laboratory of Flexible Electronics (LoFE) & Jiangsu Key Laboratory of Smart Biomaterials and Theranostic Technology, Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, Nanjing 210023, China.

Gels (Basel, Switzerland)

|August 28, 2025

Summary

Gel-type electrofluorochromic (EFC) devices combine redox-active luminophores with gel matrices for flexible optoelectronics. This review covers their principles, applications, and future directions for adaptive, energy-efficient devices.

Keywords:

data encryption electrofluorochromism flexible optoelectronics gel electrolytes gel-based electrofluorochromic devices smart displays

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Area of Science:

Optoelectronics
Materials Science
Electrochemistry

Background:

Gel-type electrofluorochromic (EFC) devices offer tunable photoluminescence via electrical stimuli.
They integrate redox-active luminophores within ion-conductive gel matrices, merging solid robustness with liquid ionic mobility.

Purpose of the Study:

To provide a comprehensive review of gel-based EFC technologies.
To outline fundamental working principles, device architectures, and performance metrics.
To highlight recent advances and future strategies for next-generation optoelectronic platforms.

Main Methods:

Categorization of gel matrices (ionogels, organogels, hydrogels) based on physicochemical properties.
Analysis of EFC device performance metrics: contrast ratio, switching time, cycling stability.
Review of diverse applications and emerging design strategies.

Main Results:

Gel-based EFC devices enable high-contrast, flexible, and multifunctional optoelectronic operations.
Different gel matrices (ionogels, organogels, hydrogels) influence EFC performance.
Successful applications demonstrated in displays, sensors, smart windows, and energy systems.

Conclusions:

Gel-based EFC technology presents a versatile platform for advanced optoelectronics.
Further research is needed to address current challenges and optimize device design for adaptive, intelligent, and energy-efficient systems.
This review guides future development in smart optoelectronic applications.