Electrical and optical properties of a poly(p-phenylenevinylene) derivative with a mesogenic substituent

被引：0

作者：

Ozaki, M. ^{[1
]}

Okazaki, Sh. ^{[1
]}

Onoda, M. ^{[1
]}

Yoshino, K. ^{[1
]}

机构：

[1] Osaka Univ, Osaka, Japan

来源：

Japanese Journal of Applied Physics, Part 2: Letters | 1998年 / 37卷 / 07期

关键词：

Experimental; (EXP);

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Electrical and optical properties of a poly(p-phenylenevinylene) derivative substituted with a long side chain containing alkoxybiphenyl mesogenic unit have been studied. A liquid-crystalline molecular alignment and layer structure have been confirmed by optical microscopic observation and X-ray diffraction measurement, respectively. The dielectric constant changes in a stepwise manner at phase transition temperatures. The band gap of the new polymer in the liquid-crystalline phase has been evaluated to be 2.3 eV, which monotonously decreases with decreasing temperature. A photoluminescence peak was observed at around 560 nm, which corresponds to the emission originating from the poly(p-phenylenevinylene) main chain. An electroluminescence device has been fabricated using this liquid-crystalline polymer and it has been found that the emission spectra depend on the polarity of the applied electric field.

引用

共 50 条

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