Controlled Redox and Electrical Properties in Polyheterocycles
Abstract
The Reynolds research group at the University of Florida has developed an extensive program for the development and application of variable gap conjugated polymers which are luminescent and semiconducting, can be doped to high levels of conductivity, and can be redox switched between charge neutral, oxidized (p-type), and reductive (n-type) states. A soluble and processable dibutyl derivative of poly(3,4-propylenedioxy-thiophene) has been synthesized directly in its neutral form by Grignard metathesis which can be switched from deep red-purple in the neutral state to highly transmissive sky blue in the oxidized state. In addition, a full series of poly(3,4-alkylenedioxypyrroles) (PXDOPs) have been developed as electron rich electrochromic polymers where substitution in the N-position allowed us to attain the high gap/high HOMO polymers. These polymers exhibit multi-color and high contrast electrochromism. We have utilized in-situ colorimetric analysis and composite coloration efficiency to elucidate the properties of these electrochromic properties. We have applied these polymers to a series of electrochromic devices utilizing both absorption/transmission and absorption/reflection designs to attenuate electromagnetic absorption through a window or shutter, or off of a surface. By using PProDOP-NPrS as the anodically coloring layer, the contrast of the ECDs has been optimized to 68% delta/tau.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 2002
- Accession Number
- ADA416608
Entities
People
- John R. Reynolds
Organizations
- University of Florida