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Journal
2007 | 5 | 4 | 923-930
Article title

Energy up-conversion in dilute polyfluorene solutions

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EN
Abstracts
EN
Poly(9,9-dioctylfluorene) (PFO) shows highly efficient blue emission with photo excitation occurring between 340–400 nm. Here we show that PFO can in dilute solution emit at a wavelength well below that at which it is being exited. This, we propose is related to an energy transfer from conjugated parts of the polymer chain into more localised states which then emit at a lower wavelength. These localised states can be considered as defects in the conjugation of the polymer or as chain ends. These may produce quasi monomer or quasi dimer species within the chain, which will have a HOMO-LUMO gap of higher energy than the conjugated polymer. These then fluoresce at the lower wavelength; essentially causing, by energy transfer, a process of energy up-conversion. [...]
Publisher

Journal
Year
Volume
5
Issue
4
Pages
923-930
Physical description
Dates
published
1 - 12 - 2007
online
1 - 12 - 2007
Contributors
  • The Department of Pure and Applied Chemistry, Thomas Graham Building, University of Strathclyde, G1, 1XL, Glasgow, UK, alexander.kuhne@strath.ac.uk
  • The Department of Pure and Applied Chemistry, Thomas Graham Building, University of Strathclyde, G1, 1XL, Glasgow, UK
  • The Department of Pure and Applied Chemistry, Thomas Graham Building, University of Strathclyde, G1, 1XL, Glasgow, UK
  • The Department of Pure and Applied Chemistry, Thomas Graham Building, University of Strathclyde, G1, 1XL, Glasgow, UK, r.a.pethrick@strath.ac.uk
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.-psjd-doi-10_2478_s11532-007-0051-7
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