Synthesis of silicon-bridged polythiophene derivatives and their applications to EL device materials

Ohshita Joji

Kimura Keisuke

Lee Kwang-Hoi

Kunai Atsutaka

Kwak Young-Woo

Son Eun-Chul

Kunugi Yoshihito

Journal of Polymer Science. Part A, Polymer Science

Palladium-catalyzed oxidative homo-coupling of 2,6-bis(tributylstannyl)dithienosiloles with CuCl2 afforded poly(dithienosilole-2,6-diyl)s as novel polythiophene derivatives with intra-chain silicon bridges, which exhibited red-shifted UV absorption maxima by about 100 nm from those of the corresponding silole-free polythiophenes. Alternate copolymers also were prepared by palladium-catalyzed cross-coupling reactions of 2,6-dibromodithienosiloles with distannylthiophene or bithophene. These polymer films were applied to single and double-layered organic electroluminescence devices. It was found that some of the resulting polymers exhibited electroluminescence properties and emitted red light in EL devices with the structure of ITO/polymer/Mg-Ag. Introducing an electron-transporting Alq3 layer between the polymer film and the Mg-Ag cathode led to a remarkable improvement in the devices performance. An application of the copolymer to a field effect transistor was also studied

conjugated polymers

luminescence

polythiophene

silole

stille reaction

transition metal chemistry

Chemistry [ 430 ]

eng

Wiley Periodicals, Inc.

Copyright(c) 2007 Wiley Periodicals, Inc.

[ISSN] 0887-624X

[DOI] 10.1002/pola.22196

[NCID] AA1068915X

[DOI] http://dx.doi.org/10.1002/pola.22196 isVersionOf