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Highly conductive and flexible color filter electrode using multilayer film structure
Jun Hee Han1, Dong-Young Kim1, Dohong Kim1
1School of Electrical Engineering, KAIST, Daejeon, Republic of Korea.
Scientific Reports
|July 5, 2016
Summary
A novel flexible color filter electrode (CFE) combines color filtering and electrode functions using silver and tungsten trioxide layers. This highly conductive and flexible CFE maintains performance when bent, showing great potential for advanced optical devices.
Area of Science:
- Materials Science
- Optoelectronics
Background:
- Flexible electronic devices require integrated components that perform multiple functions.
- Existing color filters and electrodes often lack the necessary flexibility and conductivity for advanced applications.
Purpose of the Study:
- To develop a high-performance flexible component that functions as both a color filter and an electrode.
- To investigate the structural, electrical, and optical properties of the proposed component.
Main Methods:
- Fabrication of a multilayer film structure using silver (Ag) and tungsten trioxide (WO3) via thermal evaporation.
- Characterization of the film's color filtering capability, sheet resistance, and flexibility through bending tests.
- Patterning of the component using photolithography or a shadow mask.
Main Results:
- The developed color filter electrode (CFE) demonstrated simultaneous color filtering and high conductivity (<2 Ω/sq).
- The CFE maintained its optical and electrical properties even after repeated bending on a polyethylene terephthalate (PET) film.
- The WO3 layer effectively bridged the Ag layers, ensuring low and stable sheet resistance.
Conclusions:
- The proposed Ag/WO3 multilayer film is a promising flexible color filter electrode (CFE).
- Its ease of fabrication and patterning, combined with excellent flexibility and performance, makes it suitable for large-area and flexible optical devices.
