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Light-Emitting and Hole-Transporting Polymers for LEDs

Published online by Cambridge University Press:  10 February 2011

Toshihiro Ohnishi ,
Shuji Doi ,
Masato Ueda ,
Fumi Yamaguchi  and
Takanobu Noguchi
Toshihiro Ohnishi
Affiliation:
Tsukuba Research Laboratory, Sumitomo Chemical Co. Ltd., 6 Kitahara, Tsukuba, Ibaraki, 300-32Japan, [email protected]
Shuji Doi
Affiliation:
Tsukuba Research Laboratory, Sumitomo Chemical Co. Ltd., 6 Kitahara, Tsukuba, Ibaraki, 300-32Japan, [email protected]
Masato Ueda
Affiliation:
Tsukuba Research Laboratory, Sumitomo Chemical Co. Ltd., 6 Kitahara, Tsukuba, Ibaraki, 300-32Japan, [email protected]
Fumi Yamaguchi
Affiliation:
Tsukuba Research Laboratory, Sumitomo Chemical Co. Ltd., 6 Kitahara, Tsukuba, Ibaraki, 300-32Japan, [email protected]
Takanobu Noguchi
Affiliation:
Tsukuba Research Laboratory, Sumitomo Chemical Co. Ltd., 6 Kitahara, Tsukuba, Ibaraki, 300-32Japan, [email protected]
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Abstract

Various copolymers of arylene vinylenes, having strong fluorescence, showed predominantly the emission in the multi-layer device using an electron-transporting material(ETM) such as tris(8-quinolinolato)aluminum(Alq3). The emission from Alq3 was suppressed due to the high hole-injection barrier from the copolymers to ETM in spite of low or no barriers of electron injection from ETM to the copolymers. We have successfully prepared highly hole-transporting polysilane having a triphenylamine group as a side chain(TPA-PS). The hole mobility as high as 10 cm3cm2/Vs is attributable to the intermolecular hopping process facilitated by the interaction between the polysilane backbone and the triphenylamine group. The polysilane is effectively used as a hole transporting material. The bilayer LED device consisting of TPA-PS and Akb3 showed high luminance (2000cd/m2) and high efficiency (4cd/A).

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 488: Symposium J – Electrical, Optical & Magnetic Properties of Organic IV , 1997 , 21
Copyright
Copyright © Materials Research Society 1998

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References

1. Tang, C.W. and VanSlyke, S.A., Appl. Phys. Lett., 51, 915, 1987.Google Scholar
2. 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.Google Scholar
3. Burn, P.L., Holmes, A.B., Kraft, A., Brown, A.R., Bradley, D.D.C., and Friend, R.H., MRS Symposium Proceedings, 247, 647, 1992.Google Scholar
4. Ohnishi, T., Noguchi, T., and Doi, S., Japanese Patent 5–247460,1993.Google Scholar
5. Ohnishi, T., Doi, S., Tsuchida, Y., and Noguchi, T., Materials and Measurements in Molecular Electronics, Springer Proceedings in Physics, 81, 245, 1996.Google Scholar
6. Nakamura, N., Wakabayashi, S., Miyairi, K., and Fujii, T., Chem.Lett., 1994, 1741.Google Scholar
7. Kido, , Nagai, K., Okamoto, Y., and Skotheim, T., Chem.Lett., 1991, 1267.Google Scholar
8. Ueda, M., Yamaguchi, F., Fujii, Y., Yahagi, I., Sasaki, M., Osada, T., Kitano, M., and Abe, Y., Europian patent 0654495A1Google Scholar
9. Doi, S., Kumwabara, M., Noguchi, T., and Ohnishi, T., Synth. Met., 57, 4174, 1993.Google Scholar