Hostname: page-component-78c5997874-lj6df Total loading time: 0 Render date: 2024-11-12T21:46:44.723Z Has data issue: false hasContentIssue false
  • English
  • Français

White Light Emitting Electroluminescence Devices with Organic Oligomers

Published online by Cambridge University Press:  10 February 2011

F. Meghdadi ,
S. Tasch ,
W. Graupner ,
S.E. Döttinger ,
M. Hanack ,
M. Graupner ,
A. Hermetter  and
G. Leising
F. Meghdadi
Affiliation:
Institut für Festkörperphysik, Technische Universität Graz, Petersgasse 16, A-8010 Graz,Austria
S. Tasch
Affiliation:
Institut für Festkörperphysik, Technische Universität Graz, Petersgasse 16, A-8010 Graz,Austria
W. Graupner
Affiliation:
Institut für Festkörperphysik, Technische Universität Graz, Petersgasse 16, A-8010 Graz,Austria
S.E. Döttinger
Affiliation:
Institut für Organische Chemie, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, Germany
M. Hanack
Affiliation:
Institut für Organische Chemie, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, Germany
M. Graupner
Affiliation:
Institut für Biochemie und Lebensmittelchemie, Technische Universität Graz, Graz, Austria
A. Hermetter
Affiliation:
Institut für Biochemie und Lebensmittelchemie, Technische Universität Graz, Graz, Austria
G. Leising
Affiliation:
Institut für Festkörperphysik, Technische Universität Graz, Petersgasse 16, A-8010 Graz,Austria
Get access

Abstract

We report on the properties of white light emitting electroluminescence (EL) devices fabricated by combining blue and orange light emitting organic materials, parahexaphenyl (PHP) and a new isothianaphthen-S-oxide (ITSO) oligomer. The EL spectrum of this oligomer blend covers the range from 400 to 650 nm. When the concentration ratios of these materials are suitably adjusted a pure white light emission (CIE coordinates of x=0.333 and y= 0.338) and a high external EL quantum efficiency of 1.2% photons/electron can be obtained. The mechanism of the white light generation is ascribed to an internal self-absorption of part of the blue PHP light emission by ITSO and a subsequent photoluminescence emission process of ITSO. The results of photoinduced absorption, which is sensitive to charged species and triplet states of these guest-host systems, are discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 488: Symposium J – Electrical, Optical & Magnetic Properties of Organic IV , 1997 , 27
Copyright
Copyright © Materials Research Society 1998

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Graupner, W., Grem, G., Meghdadi, F., Paar, C., Leising, G., Mol. Cryst. Liq. Cyst., 265, 54 (1994).Google Scholar
2. Era, M., Tsutsui, T., and Saito, S., Appl. Phys. Lett., 67, 2436 (1995).Google Scholar
3. Meghdadi, F., Leising, G., Fischer, W., Stelzer, F., Synth. Metals, 76, 113 (1996).Google Scholar
4. Tasch, S., Brandstätter, C., Meghdadi, F., Leising, G., Athouel, L., Froyer, G., Adv.Mat., 9, 33 (1997).Google Scholar
5. Leising, G., Tasch, S., Meghdadi, F., Athouel, L., Froyer, G., Scherf, U., Synth. Met., 81 185 (1996).Google Scholar
6. Meghdadi, F., Eder, E., Stelzer, F., Leising, G., Conference Proceeding ANTEC 97, 2, 1291 (1997).Google Scholar
7. Tasch, S., List, J.W.E., Ekström, O., Graupner, W., Schlichting, P., Rohr, U., Geerts, Y., Scherf, U., Müllen, K., Leising, G., Appl. Phys. Lett., 71, 2883 (1997)Google Scholar
8. Jonson, G.E., McGrane, K.M., SPIE, San Jose, California, (1993).Google Scholar
9. Kido, J., Hongawa, K., Okuyama, K., Nagai, K., Appl. Phys. Lett., 81, 564 (1994).Google Scholar
10. Berggren, M., Gustafsson, G., Inganäs, O., Anderson, M.R., Hjertberg, T., Wennerström, O., J. Appl. Phys., 76, 7530 (1994).Google Scholar
11. Kido, J., Kaimura, M., Nagai, K., Science, 267, 1332 (1995).Google Scholar
12. Kido, J., Ikeda, W., Kaimura, M., Nagai, K., Jpn. J. Appl. Phys., 35, L394 (1996).Google Scholar
13. Matsura, M., Tokailin, H., Eida, M., Hosokawa, C., Hyronaka, Y., Kosumoto, K., Proc. Asia Display, 95, 269 (1995).Google Scholar
14. Wu, C.C., Strum, J.C., Register, R.A., Appl.Phys.Letter, 69, 3117(1996).Google Scholar
15. Jordan, R.H., Dodabalapur, A., Strukelj, M., Miller, T.M., Appl. Phys. Lett., 68, 1192.(1996).Google Scholar
16. Kovacic, P. and Lange, R.M., J.Org.Chem., 29, 2416 (1964).Google Scholar
17. Froyer, G., Plous, Y., Dall'arche, E., Chevrot, C., Sivoe, A., Fr.Patent No. 9008091 (1990).Google Scholar
18. Cava, M.P., Pollack, N., Mamer, O.A., Mitchell, J.J., J. Org. Chem., 36, 3932 (1971).Google Scholar
19. Graupner, W., Eder, S., Petritsch, K., Leising, G., Synth. Met., 84, 507 (1997).Google Scholar
20. Stampfl, J., Tasch, S., Leizing, G., Synth. Met., 71, 2125 (1995).Google Scholar