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Optically and Electrically Excited Semiconducting polymer Structures

  • H. Becker (a1), S. E. Burns (a1), G. J. Denton (a1), N. T. Harrison (a1), N. Tessler (a1), T. D. Wilkinson (a2) and R. H. Friend (a1)...


We report recent advances in the development of conjugated polymer device structures. We have fabricated vertical microcavity structures in which the optical path distance is tunable through control of the orientation of a liquid crystal layer, and demonstrate cavity tuning over 59 nm. We show that this structure allows convenient matching of cavity modes to the freespace emission spectrum from poly(r henylene vinylene), PPV. We have investigated the operation of electrically-excited polymer LEDs with short pulse operation, and have achieved current densities above 103 A/cm2 and peak brightnesses of up to 5 × 106 cd/m 2. We have measured the optical absorption due to the injected carriers under these drive conditions, and find an absorption band near 1.6 eV which we attribute to the presence of polarons. This allows measurement of the injected charge density, from which we deduce that carrier mobilities are strongly enhanced at high fields, reaching values of 4 x 10−2 cm2/Vsec for PPV diodes.



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1. Burroughes, J. H., Bradley, D. D. C., Brown, A. R., Marks, R. N., Mackay, K., Friend, R. H., Burns, P. L. and Holmes, A. B., Nature 347, 539 (1990).
2. Carter, J. C., Grizzi, I., Heeks, S. K., Lacey, D. J., Latham, S. G., May, P. G., delospanos, O. R., Pichler, K., Towns, C. R. and Wittmann, H. F., Appl. Phys. Lett. 71, 34 (1997).
3. Tessler, N., Denton, G. J. and Friend, R. H., Nature 382, 695 (1996).10.1038/382695a0
4. Hide, F., Diazgarcia, M. A., Schwartz, B. J., Andersson, M. R., Pei, Q. B. and Heeger, A. J., Science 273, 1833 (1996).
5. Denton, G. J., Tessler, N., Stevens, M. A. and Friend, R. H.., Adv. Mater. 9, 547 (1997).
6. Denton, G. J., Tessler, N., Harrison, N. T. and Friend, R. H., Phys. Rev. Lett. 78, 733 (1997).
7. Becker, H., Burns, S. E., Tessler, N. and Friend, R. H., J. Appl. Phys. 81, 2825 (1997).
8. Becker, H., Burns, S. E. and Friend, R. H., Phys. Rev. B 56, 1893 (1997).
9. Denton, G. J., Tessler, N., Stevens, M. A., Burns, S. E., Harrison, N. T. and Friend, R. H., Proceedings of SPIE. July/August San Diego, 1997),.
10. Becker, H., Wilkinson, T. D. and Friend, R. H., Appl. Phys. Lett., (in press).
11. Tessler, N., Harrison, N. T. and Friend, R. H., Adv. Mater., (in press).
12. Drexhage, K. H., in Prog. Opt. Wolf, E., Eds. (North-Holland, 1974), vol. XII, pp. 163.
13. Tsutsui, T., Adachi, C., Saito, S., Watanabe, M. and Koishi, M., Chem. Phys. Lett. 182, 143 (1991).
14. Dodabalapur, A., Rothberg, L. J., Miller, T. M. and Kwock, E. W., Appl. Phys. Lett. 64, 2486 (1994).
15. Grüner, J., Cacialli, F. and Friend, R. H., J. Appl. Phys. 80, 207 (1996).
16. Sharp, G. D., Johnson, K. M. and Doroski, D., Optics Lett. 15, 523 (1990).
17. Rothberg, L. J., Yan, M., Papadimitrakopoulos, F., Galvin, M. E., Kwock, E. W. and Miller, T. M., Synth. Met. 80, 41 (1996).
18. Bradley, D. D. C. and Friend, R. H., J. Phys.:Condens Matter 1, 3671 (1989).
19. Harrison, M. G., Ziemelis, K. E., Friend, R. H., Burn, P. L. and Holmes, A. B., Synth. Met. 55, 218 (1993).
20. Blom, P. W. M., Dejong, M. J. M. and Vleggaar, J. J. M., Appl. Phys. Lett. 68, 3308 (1996).
21. Lidzey, D. G., Bradley, D. D. C., Alvarado, S. F. and Seidler, P. F., Nature 386, 135 (1997).
22. Blom, P. W. M., de Long, M. J. and van Munster, M. G., Phys. Rev. B 55, 1 (1997).
23. Ziemelis, K. E., Hussain, A. T., Bradley, D. D. C., Friend, R. H., Rühe, J. and Wegner, G., Phys. Rev. Lett. 66, 2231 (1991).
24. Dyreklev, P., Inganäs, O., Paloheimo, J. and Stubb, H., J. Appl. Phys. 71, 2816 (1992).
25. Halls, J. J. M., Pichler, K., Friend, R. H., Moratti, S. C. and Holmes, A. B., Appl. Phys. Lett. 68, 3120 (1996).
26. Vestweber, H., Bässler, H., Grüner, J. and Friend, R. H., Chem. Phys. Lett. 256, 37 (1996).
27. Greenham, N. C. and Friend, R. H., in Solid State Physics Ehrenreich, H., Spaepen, F. A., Eds. (Academic Press, 1995), vol.49, pp. 2.
28. Young, R. A., Phil. Mag. Lett. 70, 331 (1994).
29. Burroughes, J. H., Jones, C. A. and Friend, R. H., Nature 335, 137 (1988).10.1038/335137a0
30. Brown, A. R., Pichler, K., Greenham, N. C., Bradley, D. D. C., Friend, R. H. and Holmes, A. B., Chem. Phys. Lett. 210, 61 (1993).
31. Redecker, M. and Bassler, H., Appl. Phys. Lett. 69, 70 (1996).10.1063/1.118122
32. Yan, M., Rothberg, L. J., Papadimitrakopoulos, F., Galvin, M. E. and Miller, T. M., Phys. Rev. Lett. 72, 1104 (1994).
33. Hsu, J. W. P., Yan, M., Jedju, T. M., Rothberg, L. J. and Hsieh, B. R., Phys. Rev. B - Cond. Matt. 49, 712 (1994).
34. Bässler, H., Schonherr, G., Abkowitz, M. and Pai, D. M., Phys. Rev. B - Cond. Matt. 26, 3105 (1982).
35. Jarrett, C. P., Brown, A. R., Friend, R. H. and de Leeuw, D. M., J. Appl. Phys. 77, 6289 (1995).
36. Berggren, M., Dodabalapur, A., Slusher, R. E. and Bao, Z., Nature 389, 466 (1997).


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