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Proceedings Paper

Organic light-emitting diodes based on arylamine molecules and polymers with a fluorene core
Author(s): Benoit Domercq; Richard D. Hreha; Andreas Haldi; Stephen Barlow; Candace P George; Seth R Marder; Massimo Malagoli; Jean-Luc Bredas; Bernard Kippelen
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Paper Abstract

A series of soluble arylamine-based hole transporting molecules with a fluorene core and with various ionization potentials have been synthesized. The transport properties of these molecules doped into polystyrene have been measured by time-of-flight experiments and compared to those of analogous compounds with a biphenyl core (TPD). Reorganization energies between the neutral molecules and their cations have been calculated using density functional theory. The effects of bond length and geometry relaxations on the overall reorganization energy in these two classes of molecules are discussed. Molecules from both classes have been doped into polystyrene and used as hole-transport layers (HTLs) in multi-layer light-emitting diodes with the structure ITO/HTL/AlQ3/Mg:Ag [ITO = indium tin oxide, AlQ3 = tris(8-hydroxyquinolinato)aluminum]. The electroluminescent properties and lifetime measurements at constant current have been evaluated. Significant variations in lifetime when using different substituents have been observed.

Paper Details

Date Published: 16 February 2004
PDF: 8 pages
Proc. SPIE 5214, Organic Light-Emitting Materials and Devices VII, (16 February 2004); doi: 10.1117/12.506459
Show Author Affiliations
Benoit Domercq, Optical Sciences Ctr./Univ. of Arizona (United States)
Georgia Institute of Technology (United States)
Richard D. Hreha, Univ. of Arizona (United States)
Andreas Haldi, Optical Sciences Ctr./Univ. of Arizona (United States)
Stephen Barlow, Univ. of Arizona (United States)
Georgia Institute of Technology (United States)
Candace P George, Univ. of Arizona (United States)
Seth R Marder, Univ. of Arizona (United States)
Georgia Institute of Technology (United States)
Massimo Malagoli, Univ. of Arizona (United States)
Jean-Luc Bredas, Univ. of Arizona (United States)
Georgia Institute of Technology (United States)
Bernard Kippelen, Optical Sciences Ctr./Univ. of Arizona (United States)
Georgia Institute of Technology (United States)


Published in SPIE Proceedings Vol. 5214:
Organic Light-Emitting Materials and Devices VII
Zakya H. Kafafi; Paul A. Lane, Editor(s)

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