Hostname: page-component-848d4c4894-2pzkn Total loading time: 0 Render date: 2024-05-11T22:51:30.217Z Has data issue: false hasContentIssue false
  • English
  • Français

Electrophosphorescent Light Emitting Devices Using New Iridium(III) Complexes

Published online by Cambridge University Press:  15 March 2011

Rupasree Ragini Das ,
Chang-Lyoul Lee  and
Jang-Joo Kim
Rupasree Ragini Das
Affiliation:
Kwangju Institute of Science and Technology, Department of Materials Science and Engineering, Kwangju, Korea
Chang-Lyoul Lee
Affiliation:
Kwangju Institute of Science and Technology, Department of Materials Science and Engineering, Kwangju, Korea
Jang-Joo Kim
Affiliation:
Kwangju Institute of Science and Technology, Department of Materials Science and Engineering, Kwangju, Korea
Get access

Abstract

We have synthesized a new tris-orthometalated Ir(mpp)3 and several bis-orthometalated Ir(III) complexes of 3-methyl-2-phenylpyridine(Hmpp). The influence of the methyl substituent in Hmpp and different ligand environments on the optical, electrochemical and electroluminescence properties of the orthometalated complexes are examined by varying the donor acceptor properties. This includes several uninegative bidentate ligands consisting of different organic functional groups. Absorption, excitation and emission spectra in solution and solid state of these complexes agree with a strong electronic excitation to 1MLCT in Ir(mpp)3 and preferably to 3MLCT in other complexes. These complexes demonstrate strong phosphorescence at room temperature with a lifetime of 1-2 μs. Multilayer organic light emitting devices using these complexes as the triplet emitter are studied using PVK (poly(9-vinyl carbazole)), CBP (4,4'-N,N'-dicarbazole-biphenyl) and TAZ (3-phenyl-4-(1'-napthyl)-5-phenyl-1,2,4-triazole) as the host materials. Ir(mpp)3exhibits quite different behavior in different host materials.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 708: Symposium BB – Organic Optoelectronic Materials, Processing and Devices , 2001 , BB3.39
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.)

References

REFERENCES

1. Lamansky, S., Djurovitch, P., Murphy, D., Abdel-Razzaq, F., Lee, H-E., Adachi, C., Burrows, P. E., Forrest, S. R. and Thompson, M. E., J. Am. Chem. Soc. 123, 4304 (2001).Google Scholar
2. Xie, H. Z., Liu, M. W., Wang, O. Y., Zhang, X. H., Lee, C. S., Hung, L. S., Lee, S. T., Teng, P. F., Kwong, H. L., Zheng, H. and Che, C. M., Adv. Mater. 13, 1245 (2001).Google Scholar
3. Wang, Y., Herron, N., Grushin, V. V., LeCloux, D. and Petrov, V., Appl. Phys. Lett. 79, 449 (2001).Google Scholar
4. Lamansky, S., Kwong, R. C., Nugent, M. R., Djurovitch, P. I. and Thompson, M. E., Organic Electronics 2, 53 (2001)Google Scholar
5. Adachi, C., Kwong, R. C., Djurovich, P., Adamovich, V., Baldo, M. A., Thompson, M. E. and Forrest, S. R., Appl. Phys. Lett. 79, 2082 (2001).Google Scholar
6. Lee, C. L., Lee, K. B. and Kim, J. -J., Appl. Phys. Lett. 77, 2280 (2000).Google Scholar
7. Watts, R. J. and Crosby, G. A., J. Am. Chem. Soc. 93, 3184 (1971).Google Scholar
8. Watts, R. J., Inorg. Chem. 20, 2302 (1981).Google Scholar
9. Nishizawa, M., Suzuki, T. M., Sprouse, S. R., Watts, R. J. and Ford, P. C., Inorg. Chem. 23, 1837 (1984).Google Scholar
10. Garces, F. O. and Watts, R. J., Magnetic Resonance in Chemistry 31, 529 (1993).Google Scholar
11. Lamansky, S., Djurovitch, P., Murphy, D., Abdel-Razzaq, F., Kwong, R., Tsyba, I., Bortz, M., Mui, B., Bau, R. and Thompson, M. E., Inorg. Chem. 40, 1704 (2001).Google Scholar
12. Adachi, C., Kwong, R. C. and Forrest, S. R., Organic Electronics 2, 37 (2001).Google Scholar
13. Kido, J., Hongawa, K., Okuyama, K. and Nagai, K., Jpn. J. Appl. Phys. Part 2 32, L917 (1993).Google Scholar
14. Lever, A. B. P., Inorganic Electronic Spectroscopy (Second Edition); Elsevier, New York, 1984, p117.Google Scholar
15. Watts, R. J., Crosby, G. A. and Sansregret, J. L., Inorg. Chem. 11, 1474 (1972).Google Scholar
16. King, K. A., Spellane, P. J. and Watts, R. J., J. Am. Chem. Soc. 107, 1431 (1984).Google Scholar
17. Adachi, C., Baldo, M. A., Forrest, S. R. and Thompson, M. E., Appl. Phys. Lett. 77, 904 (2000).Google Scholar