Electronic Structures of Planar and Nonplanar Polyfluorene

  • Takashi Kobayashi
  • Takashi Nagase
  • Hiroyoshi NaitoEmail author
Part of the Springer Series in Materials Science book series (SSMATERIALS, volume 203)


Polyfluorene is well known as an efficient blue emitter for polymer-based light-emitting diodes and is very attractive from a physical point of view because randomly twisted, regularly twisted, or planar conformations can be realized in its solid state. In this chapter, the relationship between its optical properties and the polymer conformation is discussed within the framework of the simple effective conjugation length model. The electronic structure of polyfluorene is also discussed based on the electroabsorption (EA) spectra of the three conformations. Different from other conjugated polymers, polyfluorene exhibits complicated EA spectra in its highly ordered thin films. From the analysis of these EA spectra, the similarities and differences in the electronic structure between polyfluorene and other conjugated polymers are clarified.



We would like to thank Sumitomo Chemical Co. Ltd., for supplying the F8 polymer. This work was financially supported by a Grant-in-Aid for Scientific Research from Japan Society for the Promotion of Science, and by a Grant-in-Aid for Scientific Research on Innovative Areas “New Polymeric Materials Based on Element-Blocks (No.2401)” of the Ministry of Education, Culture, Sports, Science and Technology, Japan.


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Copyright information

© Springer Science+Business Media Singapore 2015

Authors and Affiliations

  • Takashi Kobayashi
    • 1
  • Takashi Nagase
    • 1
  • Hiroyoshi Naito
    • 1
    Email author
  1. 1.Department of Physics and ElectronicsOsaka Prefecture UniversitySakaiJapan

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