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From a Reaction Mechanism to New Ppv's for High Performance Polymer-Leds

Published online by Cambridge University Press:  10 February 2011

H. Spreitzer
Affiliation:
COVION Organic Semiconductors GmbH, Industrial Park Höchst, G865 A, D-65926 Frankfurt am Main, Germany, spreitzer@covion.com
H. Becker
Affiliation:
COVION Organic Semiconductors GmbH, Industrial Park Höchst, G865 A, D-65926 Frankfurt am Main, Germany, spreitzer@covion.com
W. Kreuder
Affiliation:
COVION Organic Semiconductors GmbH, Industrial Park Höchst, G865 A, D-65926 Frankfurt am Main, Germany, spreitzer@covion.com
E. Kluge
Affiliation:
COVION Organic Semiconductors GmbH, Industrial Park Höchst, G865 A, D-65926 Frankfurt am Main, Germany, spreitzer@covion.com
H. Schenk
Affiliation:
COVION Organic Semiconductors GmbH, Industrial Park Höchst, G865 A, D-65926 Frankfurt am Main, Germany, spreitzer@covion.com
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Abstract

Poly(ρ-phenylene vinylene)s (PPVs) are very promising materials for optoelectronic applications, especially for displays based on polymer light emitting diodes (PLEDs). We report here our findings concerning defect structures in this materials and the influence of the discovered irregularities on an important property of the materials, i.e. the operational life in a PLED. Recent improvements, which were deviated from this findings are presented: optimized PPVs with a lower amount of defects result in a strong increase of operational lifetime.

Type
Research Article
Copyright
Copyright © Materials Research Society 1999

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References

REFERENCES

[1] Burroughes, J. H., Bradley, D. D. C., Brown, A. R., Marks, R. N., Mackay, K., Friend, R. H., Bums, P. L., and Holmes, A. B., Nature 347, p. 539 (1990).Google Scholar
[2] In the GILCH procedure, 1,4-bis(halomethyl)benzenes are polymerized by the addition of a base: Gilch, H. G., Wheelwright, W. L., J. Polym. Sci., Part A: Polym Chem. 4, p. 1337 (1966).Google Scholar
[3] Spreitzer, H., Becker, H., Kluge, E., Kreuder, W., Schenk, H., Demandt, R., and Schoo, H., Adv. Mater. 10, p. 1340 (1998).Google Scholar
[4] http://www.cdtltd.co.uk/avresults.html (February 1999)Google Scholar
[5] Kraft, A., Grimsdale, A. C., Holmes, A. B., Angew. Chem. Int. Ed. 37, p. 402 (1998).Google Scholar
[6] Gelinck, G. H., Warman, J. M., and Staring, E. G. J., J. Phys. Chem. 100, p. 5485 (1996).Google Scholar
[7] 1H and 13C NMRs were measured for all polymers. For 2a and 2d gradient-selected H,C shift correlations were carried out. Additionally a gradient-selected H,C shift correlation experiment optimized for long-range couplings was run for 2d. Details on this investigations will be presented elsewhere: Becker, H., Spreitzer, H., Ibrom, K., and Kreuder, W., Macromolecules, submitted for publication.Google Scholar
[8] Parker, I. D., Cao, Y., and Yang, C. Y., J. Appl. Phys., 85, p. 2441 (1999).Google Scholar
[9] Liedenbaum, C., presentation at the 200. WE-Heraeus-Seminar, Electroluminescence of Organic Materials: Fundamentals, Materials and Devices, 24-26 June 1998, at Physikzentrum Bad Honnef.Google Scholar