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Highly Polarized Light Emission from Uniaxially Aligned Thin Films of Biphenyl/Thienothiophene Co-oligomer
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- Authors
- Yong-Young Noh, Dong-Yu Kim, Masahiro Misaki, Kiyoshi Yase
- Issue Date
- 2008-09
- Citation
- Thin Solid Films, v.516, no.21, pp.7505-7510
- ISSN
- 0040-6090
- Publisher
- Elsevier
- Language
- English
- Type
- Journal Article
- Abstract
- Polarized light emission has various potential uses in electro-optic applications such as providing backlighting for liquid crystal displays without a loss of brightness. This study examined the highly polarized light emission of a thienothiophene-based oligomer, 2,5-bis-(4-biphenylyl)-thieno[3,2-b]thiophene (BPTT), deposited on a friction-transferred polymer film. The BPTT film showed a high polarization ratio of more than 6 by alignment of the backbone of the molecule along the friction-transfer direction of the polymer chain. A strong correlation between the photoluminescent spectrum and the morphology of the film also was observed. © 2008 Elsevier B.V. All rights reserved.