The effects of alkyl side-chain length and shape of polyfluorenes on the photoluminescence spectra and the fluorescence lifetimes of polyfluorene blends with poly(n-vinylcarbazole)
The effects of side-chain length and shape at C-9 position of polyfluorenes on the photoluminescence spectra and the fluorescence lifetimes are investigated for blue light-emitting poly(n-vinylcarbazole)/polyfluorene blends. As the side-chain length of alkylsubstituted polyfluorenes and of bulky cyclohexyl-substituted polyfluorenes increases, the fluorescence lifetime of the blends increase from 1 to 10 ns and the portion of PVK component contributing to the fluorescence lifetime of the blends increases. However, PL intensity of the blend decreases. This provides the side-chain length and shape of polyfluorene could affect the efficiency of energy transfer. (C) 2004 Elsevier B.V. All rights reserved.
- Publisher
- Elsevier Science Bv
- Issue Date
- 2004-07
- Language
- English
- Article Type
- Article
- Keywords
ENERGY-TRANSFER DYNAMICS; LIGHT-EMITTING-DIODES; CONJUGATED POLYMERS; EXCITATION; EMISSION
- Citation
CHEMICAL PHYSICS LETTERS, v.393, no.1-3, pp.197 - 203
- ISSN
- 0009-2614
- Appears in Collection
- CH-Journal Papers(저널논문)
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