Chiral Oligothiophenes with Circularly Polarized Luminescence

  • Author: Chemistry – A European Journal
  • Published Date: 24 January 2021
  • Copyright: Wiley-VCH GmbH
thumbnail image: Chiral Oligothiophenes with Circularly Polarized Luminescence

Related Societies

Controlling the circular polarization (CP) of light is useful, e.g., for new types of organic light-emitting diodes (CP-OLEDs). Thin films of chiral π-conjugated organic molecules can be used to achieve the emission of left- and right-handed circularly polarized light in both photoluminescence (CPL) and electroluminescence (CPEL) applications. CPEL has been described in various classes of chiral π-conjugated systems, but no examples of CP-OLEDs based on chiral oligothiophenes had been reported so far.

Franco Cacialli, University College London, UK, Lorenzo Di Bari, University of Pisa, Italy, and colleagues have designed four different chiral 1,4-phenylene and 9H-carbazole-based oligothiophenes (pictured below on the left and right, respectively) with strong photoluminescence in the solid state. Thin films of the compounds were prepared by spin-coating them onto glass plates. The CPL spectra revealed strong signals across a wide range of wavelengths, mainly originating from the compounds' chiral supramolecular architectures.


The team built a CP-OLED device based on chiral oligothiophene 4, which showed remarkable CPEL. According to the researchers, this is the first CP-OLED with an active layer made of a single small organic compound as a neat material—a very simple architecture compared to other recent CP-OLEDs.



Article Views: 1224

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in

If you would like to reuse any content, in print or online, from, please contact us first for permission. more

Follow on Facebook Follow on Twitter Follow on YouTube Follow on LinkedIn Follow on Instagram RSS Sign up for newsletters

Magazine of Chemistry Europe (16 European Chemical Societies) published by Wiley-VCH