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APS » Journals » Phys. Rev. Lett. » Volume 89 » Issue 16
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Phys. Rev. Lett. 89, 167401 (2002) [4 pages]

Intrinsic Room-Temperature Electrophosphorescence from a π-Conjugated Polymer

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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

Received 16 October 2001; revised 30 April 2002; published 26 September 2002

See accompanying Physics Focus

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.

© 2002 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.89.167401
DOI:
10.1103/PhysRevLett.89.167401
PACS:
78.55.Kz, 78.60.Fi, 78.66.Qn, 85.60.Jb

*Corresponding author.

Electronic address: lupton@mpip-mainz.mpg.de

 
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