Skip to main content Accessibility help
×
Home

LECs Made of m-Lppp

  • F. P. Wenzl (a1), S. Tasch (a1), J. Gao (a2), L. Holzer (a3), U. Scherf (a1), A.J. Heeger (a2) and G. Leising (a1)...

Abstract

We report the application of the blue light emitting conjugated polymer m-LPPP (methyl substituted laddertype poly(paraphenylene) ) in light emitting electrochemical cells. The active layer of the LEC consists of a blend of m-LPPP with the ionically conductive polymer PEO and LiCF3SO3 as ionic salt. Investigations of different concentrations of PEO and salt showed that the best LECs made of m-LPPP up to now where realised with an active layer consisting of a blend of m-LPPP:PEO:salt in the range of 20:10:3. In this case we are able to realise LECs with response times in the range of 30 μs. The I/U characteristics show low turn on voltages both for current and electroluminescence, but only in the case of ITO biased as a cathode. The initial electroluminescence spectra are quite the same as those for LEDs made of m-LPPP but turn into green after some time of operation.

Copyright

References

Hide All
1. Burroughes, J. H., Bradley, D. D. C., Brown, A. R., Marks, R. N., Mackay, K., Friend, R. H., Burn, P. L., Kraft, A., Holmes, A. B., Nature 347, 539 (1990).
2. Braun, D., Heeger, A. J., Appl. Phys. Lett. 68, 1982 (1991).
3. Grem, G., Leditzky, G., Ullrich, B., Leising, G., Adv. Mater. 4, 36 (1992).
4. Greenham, N. C., Moratti, S. C., Bradley, D. D. C., Friend, R. H., Holmes, A. B., Nature 365, 628 (1993).
5. Ohmori, Y., Uchido, M., Muro, K., and Yoshino, K., Jpn. J. Appl. Phys. 30, L1938 (1991).
6. Tang, C. W., Williams, D. J., Chang, J. C., US-Patent 5,294,870 (1994).
7. Matsura, M., Tokailin, H., Eida, M., Hosokawa, C., Hironaka, Y. and Kusumoto, T., Proc. Asia Diplay '95, 269 (1995).
8. Tasch, S., Brandstätter, C., Meghdadi, F., Leising, G., Froyer, G., Athouel, L., Adv. Mater. 9, 33(1997)
9. Pei, Q., Yu, G., Zang, C., Yang, Y., Heeger, A. J., Science 269, 1086 (1995).
10. Pei, Q., Yang, Y., Yu, G., Zhang, C., and Heeger, A.J., J. Am. Chem. Soc. 118,3922 (1996).
11. Pei, Q., Yang, Y., Synth. Met. 80, 131 (1996).
12. Cao, Y., Yu, G., Heeger, A.J., Yang, C.Y., Appl. Phys. Lett. 68, 3218 (1996).
13. Tasch, S., Niko, A., Leising, G., Scherf, U., Appl. Phys. Lett. 68, 1090 (1996)
14. Meinhard, G., Horvath, A., Weiser, G., Leising, G., Syth. Met. 84, 669 (1997)
15. Yang, Y., Q. Pei,J. Appl. Phys. 81,3294 (1997)
16. Tasch, S., Gao, J., Wenzl, F.P., Scherf, U., Müllen, K., Leising, G., A.J. Heeger (unpublished)

LECs Made of m-Lppp

  • F. P. Wenzl (a1), S. Tasch (a1), J. Gao (a2), L. Holzer (a3), U. Scherf (a1), A.J. Heeger (a2) and G. Leising (a1)...

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed