Journal of Materials Science: Materials in Electronics

, Volume 14, Issue 5, pp 397–401

Effects of molecular shape on the photoluminescence of dyes embedded in a chiral polymer with a photonic band gap

Authors

  • K. Bjorknas
    • Department of Engineering ScienceUniversity of Oxford
  • P. Raynes
    • Department of Engineering ScienceUniversity of Oxford
  • S. Gilmour
    • Sharp Laboratories of Europe Ltd
Article

DOI: 10.1023/A:1023913104169

Cite this article as:
Bjorknas, K., Raynes, P. & Gilmour, S. Journal of Materials Science: Materials in Electronics (2003) 14: 397. doi:10.1023/A:1023913104169

Abstract

Circularly polarized photoluminescence has been generated by embedding fluorescent guest molecules in a helically aligned polymer host with a selective reflection band, which coincides with the emission wavelength of the embedded dyes. We have investigated the photoluminescence from a range of guest molecules of varying shapes and found that one circular polarization is suppressed within the reflection band of the host independently of the shape of the guest molecules. However, just outside the band edges, there is an enhancement of the same polarization and the relative magnitudes of the enhancement at the two band edges is strongly influenced by the shape of the guest molecules. This effect has been understood from the ordering of the guest molecules in the polymer host.

Copyright information

© Kluwer Academic Publishers 2003