Star-like fluorene based polyamines: Non-conjugated building blocks for light-harvesting materials

K. R.Justin Thomas, Jiann T. Lin*, Chien Min Tsai, Hong-Cheu Lin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


We report herein a series of novel tetramines (2-6) built using the fluorene core. The design features a diamine conjugated by a fluorene core and two non-conjugated triarylamines dangling through the bridge methine moiety. These polyamines are amorphous in nature and display moderate emission properties that are either dependent on the nature of the arylamine segments or reminescent of the fluorene backbone. The phenyl, naphthyl, fluorenyl and carbazolyl amine based materials are blue emissive while the pyrenylamine based compound emits yellow-green color. We demonstrate a possibility of using blue-emitting fluorene derivatives (2 and 4) blended with poly(N-vinylcarbazole) (PVK) to fabricate organic light emitting diodes (OLEDs). Emissions in the EL devices purely originated from the fluorene derivatives alone (blue) are contaminated with those of complex species (electromer/electroplex) formed by intermolecular interactions.

Original languageEnglish
Pages (from-to)3517-3522
Number of pages6
Issue number15
StatePublished - 10 Apr 2006


  • Emission
  • Excimer
  • Triarylamines

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