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An electrochromic painter's palette: color mixing via solution co-processing
Rayford H Bulloch1, Justin A Kerszulis, Aubrey L Dyer
1School of Chemistry and Biochemistry and School of Materials Science and Engineering, Center for Organic Photonics and Electronics, Georgia Institute of Technology , Atlanta, Georgia 30332, United States.
ACS Applied Materials & Interfaces
|January 13, 2015
Summary
Researchers developed a new method for controlling electrochromic polymer (ECP) colors by mixing ECP-Cyan, ECP-Magenta, and ECP-Yellow. This approach enables predictable, vibrant colors in ECP films, mimicking traditional CMY color models.
Area of Science:
- Materials Science
- Polymer Chemistry
- Optoelectronics
Background:
- Electrochromic polymers (ECPs) offer tunable colors but precise color control remains challenging.
- Traditional color mixing methods are well-established in industries like printing.
Purpose of the Study:
- To investigate the application of CMY color mixing principles to electrochromic polymers.
- To develop a method for achieving predictable and vibrant colors in ECP films through co-processing mixtures.
Main Methods:
- Identified three colored-to-transmissive ECPs: ECP-Cyan, ECP-Magenta, and ECP-Yellow.
- Co-processed mixtures of these ECPs to form thin films.
- Estimated mass extinction coefficients (εmass) and compared predicted vs. observed color values using color difference (ΔEab).
Main Results:
- ECP mixtures successfully followed the CMY color mixing model.
- Co-processed ECP mixtures resulted in vibrantly colored, visually continuous films.
- Calculated color difference (ΔEab) averaged 15, indicating reasonable agreement between predicted and observed colors.
Conclusions:
- Demonstrated the ability to co-process ECP mixtures for predictable color generation.
- Validated the use of CMY color mixing principles for electrochromic polymer applications.
- This method offers a pathway to fine color control in electrochromic devices.
