Conjugated Polymer Blends for High Contrast Black‐to‐Transmissive Electrochromism
Abstract
Next‐generation electrochromic technologies, such as dimmable fenestration, eyewear integrated displays, and optical shutters require materials that reversibly transition between highly transmissive and broadly absorbing achromatic states, often with minimal intermediate coloration. In this work, it is shown how the properties of dioxythiophene‐based electrochromic polymers (ECPs) can be leveraged through straightforward color mixing to yield high‐contrast, black‐to‐transmissive materials with low driving voltages (C*ab < 5) and integrated optical contrast exceeding 40% across the entire visible spectrum (380–780 nm). By incorporating different high‐gap and dual‐band absorbing ECPs, subtle control is demonstrated over both the extreme and intermediate coloration of the blends. This work showcases how solution coprocessing of ECPs can be used to access highly targeted achromatic hues while also enabling fine‐tuned neutral optical transition between black and transmissive states.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jul 01, 2018
- Source ID
- 10.1002/adom.201800594
Entities
People
- Anna M Österholm
- Dwanleen Eric Shen
- Dylan T Christiansen
- John R Reynolds
- Lisa R Savagian
- Michael Kuepfert
Organizations
- Air Force Office of Scientific Research
- BASF
- Georgia Tech
- National Science Foundation