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Completing the color palette with spray-processable polymer electrochromics.

Aubrey L Dyer¹, Emily J Thompson, John R Reynolds

¹The George and Josephine Butler Polymer Research Laboratory, Center for Macromolecular Science and Engineering, Department of Chemistry, Box 117200, University of Florida, Gainesville, Florida 32611, USA. adyer@chem.ufl.edu

ACS Applied Materials & Interfaces

|April 19, 2011

Summary

Researchers developed a full spectrum of electrochromic polymers, enabling diverse colors for advanced display technologies. These solution-processable materials offer vibrant hues and high transmissivity for next-generation applications.

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Area of Science:

Materials Science
Polymer Chemistry
Electrochemistry

Background:

Electrochromic polymers enable dynamic color changes in response to electrical stimuli.
Previous research focused on limited color ranges and processability challenges.
A complete color palette is crucial for versatile electrochromic display applications.

Purpose of the Study:

To achieve a full spectrum of colors for electrochromic polymers.
To develop solution-processable materials for versatile applications.
To expand the utility of electrochromic polymers in displays and windows.

Main Methods:

Synthesizing 3,4-alkylenedioxythiophene polymers with tailored electron-rich and donor-acceptor units.
Employing electron-donating substituents and steric interactions for color tuning.

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Incorporating solubilizing pendant groups for organic and aqueous compatibility.

Main Results:

A yellow, cathodically coloring, solution-processable electrochromic polymer was synthesized, completing the color palette.
Previously developed polymers offered colors including orange, red, magenta, blue, cyan, green, and black, all achieving high transmissivity.
The developed polymers are fully solution-processable, enabling patterning and printing.

Conclusions:

The full color palette of electrochromic polymers is now achievable through targeted synthetic modifications.
Solution processability of these polymers opens avenues for advanced display and window applications.
This advancement significantly broadens the scope of electrochromic materials for commercial use.