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Intrinsic Room-Temperature Electrophosphorescence from a π-Conjugated Polymer

J. M. Lupton, A. Pogantsch, T. Piok, E. J. W. List, S. Patil, and U. Scherf
Phys. Rev. Lett. 89, 167401 – Published 26 September 2002
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Abstract

Electrically induced phosphorescence from a poly(para-phenylene) ladder-type polymer is observed for the first time and characterized using time resolved spectroscopy. Short-lived phosphorescence is also observed in gated fluorescence spectra and is found to be quenched reversibly by oxygen. Thermally activated triplet diffusion to covalently bound palladium sites, which are formed at a concentration of about 80 ppm in a side reaction during polymer synthesis, is believed to be the cause of this novel effect, which suggests a new approach to the design of efficient electroluminescent materials.

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  • Received 16 October 2001

DOI:https://doi.org/10.1103/PhysRevLett.89.167401

©2002 American Physical Society

Authors & Affiliations

J. M. Lupton1,*, A. Pogantsch2, T. Piok3, E. J. W. List2,3, S. Patil4, and U. Scherf4

  • 1Max Planck Institute for Polymer Research, Ackermann-Weg 10, D-55128 Mainz, Germany
  • 2Institute of Solid State Physics, Graz University of Technology, A-8010 Graz, Austria
  • 3Christian Doppler Laboratory of Advanced Functional Materials, Institute of Solid State Physics, Graz University of Technology, A-8010 Graz, Austria and Institute of Nanostructured Materials and Photonics, A-8160 Weiz, Austria
  • 4Institut für Chemie, Universität Potsdam, D-14476 Golm, Germany

  • *Corresponding author. Electronic address: lupton@mpip-mainz.mpg.de

See Also

A Little Impurity Goes a Long Way

JR Minkel
Phys. Rev. Focus 10, 14 (2002)

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Vol. 89, Iss. 16 — 14 October 2002

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