Lasing in microcavities of fluorene-based polymer blends with liquid crystallinity
SCIE
SCOPUS
- Title
- Lasing in microcavities of fluorene-based polymer blends with liquid crystallinity
- Authors
- Lee, TW; Park, OO; Cho, HN; Kim, YC
- Date Issued
- 2003-01
- Publisher
- ELSEVIER SCIENCE BV
- Abstract
- We report lasing characteristics of fluorene-based luminescent polymer blends with liquid crystallinity in a microcavity structure. Fluorene-based light-emitting polymers, poly(2,7-bis(p-stiryl)-9,9'-di-n-hexylfluorene sebacate) (PBSDHFS) and poly(9,9'-di-n-hexyl fluorenediylvinylene-alt-1,4-phenylenevinylene) (PDHFPPV), and a laser dye, 4(dicyanomethylene)-2-methyl-6-(p-dimethylaminostyryl)-4H-pyran (DCM) were used to comprise a binary or ternary blend system. We employed the Forster-type energy transfer from a liquid crystalline donor to a non-crystalline acceptor to obtain a low lasing threshold as well as to tune the color. The binary blend film of PBSDHFS/PDHFPPV (98/2 by wt.) demonstrated a very low-threshold energy (similar to3 nJ/cm(2)/pulse) for microcavity-lasing. We also observed a redshifed lasing from the PBSDHFS/PDHFPPV/DCM (98/2/2 by wt.) ternary blend device as a result of the cascade excitation energy transfer. (C) 2002 Elsevier Science B.V. All rights reserved.
- Keywords
- microcavity laser; liquid crystalline blend; energy transfer; AMPLIFIED SPONTANEOUS EMISSION; LIGHT-EMITTING-DIODES; ORGANIC THIN-FILMS; SEMICONDUCTING POLYMER; CONJUGATED POLYMERS; LASER; EFFICIENCY
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/28877
- DOI
- 10.1016/S0925-3467(02)00221-5
- ISSN
- 0925-3467
- Article Type
- Article
- Citation
- OPTICAL MATERIALS, vol. 21, no. 1-3, page. 673 - 678, 2003-01
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