Hostname: page-component-586b7cd67f-2brh9 Total loading time: 0 Render date: 2024-11-28T07:42:02.581Z Has data issue: false hasContentIssue false
  • English
  • Français

Efficient blue-green molecular organic light emitting diodes based on novel silole derivatives

Published online by Cambridge University Press:  01 February 2011

Leonidas C. Palilis ,
Hideyuki Murata ,
Antti J. Mäkinen ,
Manabu Uchida  and
Zakya H. Kafafia
Leonidas C. Palilis*
Affiliation:
Optical Sciences Division, U.S. Naval Research Laboratory, Washington, DC 20375
Hideyuki Murata
Affiliation:
School of Materials Science, Japan Advanced Institute of Science Technology, Ishikawa 923-1292, Japan
Antti J. Mäkinen
Affiliation:
Optical Sciences Division, U.S. Naval Research Laboratory, Washington, DC 20375
Manabu Uchida
Affiliation:
Chisso Corporation, Yokohama, Kanagawa 236-8605, Japan
Zakya H. Kafafia
Affiliation:
Optical Sciences Division, U.S. Naval Research Laboratory, Washington, DC 20375
*
*Corresponding author: [email protected]
Get access

Abstract

We report on highly efficient molecular organic light-emitting diodes (MOLEDs) using two novel silole derivatives as emissive and electron transport materials. A silole derivative, namely 2,5-di-(3-biphenyl)-1,1-dimethyl-3,4-diphenylsilacyclopentadiene (PPSPP), which shows blue fluorescence with a high photoluminescence quantum yield of 85% in the solid state, was used as the emissive material. Another silole derivative, namely 2,5-bis-(2‘2“-bipyridin-6-yl)-1,1- dimethyl-3,4-diphenylsilacyclopentadiene (PyPySPyPy), that exhibits a non-dispersive high electron mobility of 2x10-4 cm2/Vsec was used as the electron transport material. MOLEDs using these two siloles and a common hole transport material show blue-green emission centered at 495 nm. This red-shifted electroluminescence (EL) band relative to the blue fluorescence of PPSPP is assigned to a PPSPP:NPB exciplex. A low operating voltage of 4.5 V was measured at a luminance of 100 cd/m2 and an EL quantum efficiency of 3.4% was achieved at 100 A/m2. To our knowledge, this is the highest EL quantum efficiency ever reported based on exciplex emission.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 725: Symposium P – Organic and Polymeric Materials and Devices-Optical, Electrical, and Optoelectronic Properties , 2002 , P1.3
Copyright
Copyright © Materials Research Society 2002

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.)

Footnotes

†

Also at SFA Inc., Largo, MD 20774; electronic mail: [email protected]

References

1. Tang, C. W. and Slyke, S. A. Van, Appl. Phys. Lett. 51, 913 (1987)Google Scholar
2. Tang, C. W. Slyke, S. A. Van, and Chen, C. H. J. Appl. Phys. 65, 3610 (1989)Google Scholar
3. Shen, Y. Klein, M. W. Jacobs, D. B. Scott, J. C. and Malliaras, G. G. Phys. Rev. Lett. 86, 3867 (2001).Google Scholar
4. Malliaras, G. G. Shen, Y. Dunlap, D. H. Murata, H. and Kafafi, Z. H. Appl. Phys. Lett. 79, 2582 (2001).Google Scholar
5. Zhou, X. He, J. Liao, L. S. Lu, M. Xiong, Z. H. Ding, X. M. Hou, X. Y. Tao, F. G. Zhou, C. E. and Lee, S. T. Appl. Phys. Lett. 74, 609 (1999)Google Scholar
6. Zhou, X. He, J. Liao, L. S. Lu, M. Ding, X. M. Hou, X. Y. Zhang, X. M. He, X. Q. and Lee, S. T., Adv. Matet. 12, 265 (2000)Google Scholar
7. Bettenhausen, J. Strohriegl, P. Brutting, W. Tokuhisa, H. and Tsutsui, T. J. Appl. Phys. 82, 4957 (1997).Google Scholar
8. Kepler, R. G. Beeson, P. M. Jacobs, S. J. Anderson, R. A. Sinclair, M. B. Valencia, V. S. and Cahill, P. A. Appl. Phys. Lett. 66, 3618 (1995)Google Scholar
9. Redecker, M. Bradley, D. D. C. Jandke, M. and Strrohriegl, P. Appl. Phys. Lett. 75, 109 (1999).Google Scholar
10. Antoniadis, H. Inbasekaran, M. and Woo, E. P. Appl. Phys. Lett., 73, 3055 (1998)Google Scholar
11. Naka, S. Okada, H. Onnagawa, H. and Tsutsui, T. Appl. Phys. Lett., 76, 197 (2000)Google Scholar
12. Grice, A. W. Bradley, D.D. C. Bernius, M. T. Inbasekaran, M. Wu, W. W. and Woo, E. P. Appl. Phys. Lett., 73, 629 (1998)Google Scholar
13. Campbell, A. J. Bradley, D.D. C. and Antoniadis, H. Appl. Phys. Lett., 79, 2133 (2001)Google Scholar
14. Tamao, K. Uchida, M. Izumizawa, T. Furukawa, K. and Yamaguchi, S. J. Am. Chem. Soc., 118, 11974 (1996)Google Scholar
15. Murata, H. Malliaras, G. G. Uchida, M. Shen, Y. and Kafafi, Z. H. Chem. Phys. Lett., 339, 161 (2001).Google Scholar
16. Murata, H. Kafafi, Z. H. and Uchida, M. Appl. Phys. Lett., 80, 189 (2002)Google Scholar
17. Yamaguchi, S. Endo, T. Uchida, M. Izumizawa, T. Furukawa, K. and Tamao, K. Chem. Eur. J. 6, 1683 (2000)Google Scholar
18. Itano, K. Ogawa, H. and Shirota, Y. Appl. Phys. Lett., 85, 636 (1999)Google Scholar
19. Palilis, L. C. Mäkinen, A. J., Murata, H. Uchida, M. and Kafafi, Z. H. In Organic Light Emitting Materials and Devices VI, Kafafi, Zakya H. Editor, Proceedings of SPIE, Vol. 4800, (In Press).Google Scholar