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Surface-Functionalized, Two-Dimensional Polymer Electrochromic Layers as Ultrafast, Multi-State Infrared Optical
Dibakar Das1, A M Mahmudul Hasan1, Rupam Roy1
1Department of Chemistry, Butler Polymer Research Laboratory, Center for Macromolecular Science & Engineering, University of Florida, Gainesville, Florida 32611, United States.
Journal of the American Chemical Society
|March 20, 2026
Summary
Surface-engineered two-dimensional polymers (2DPs) with ionophilic pores achieve significantly faster switching speeds in electrochromic devices. This breakthrough enables new possibilities for adaptive optics and photonic information processing.
Area of Science:
- Materials Science
- Nanotechnology
- Optoelectronics
Background:
- Electrochromic devices offer great potential but are limited by slow switching speeds.
- Developing advanced materials is crucial for overcoming these limitations in real-world applications.
Purpose of the Study:
- To report surface-engineered two-dimensional polymers (2DPs) with ionophilic pores for enhanced electrochromic device performance.
- To demonstrate unprecedented switching speeds and multistate optical responses in solid-state devices.
Main Methods:
- Synthesized crystalline donor-acceptor 2DPs functionalized with ethylene glycol oligomers.
- Compared performance with alkyl-functionalized 2DPs.
- Investigated rapid switching under oxidative and reductive conditions.
Main Results:
- Achieved 4x faster switching speeds (t_c = 320 ms) and 3x higher coloration efficiency (491 cm^2 C^-1) with ethylene glycol functionalized 2DPs.
- Demonstrated robust, stable multistate infrared absorption and optical responses.
- Leveraged surface-functionalized 2DPs as multistate infrared logic gates.
Conclusions:
- Surface engineering of nanoporous crystalline lattices co-optimizes electronic and ionic conductivity for rapid electrochromic switching.
- Surface-engineered 2DPs are promising for electrochromic coatings and photonic information processing.
- The demonstrated multistate infrared characteristics highlight their utility in integrated optoelectronic circuits.
