Synergistic photoluminescence enhancement in conjugated polymer-di-ureasil organic-inorganic composites
Citation:
Willis-Fox N., Marques A., Marques A., Arlt J., Scherf U., Carlos L., Burrows H., Evans R., Synergistic photoluminescence enhancement in conjugated polymer-di-ureasil organic-inorganic composites, Chemical Science, 6, 12, 2015, 7227-7237Download Item:
Abstract:
Poly(
fl
uorene) conjugated polyelectrolyte (CPE)-di-ureasil organic
–
inorganic composites have been prepared
using a versatile sol
–
gel processing method, which enables selective localisation of the CPE within the di-
ureasil matrix. Introduction of the CPE during the sol
–
gel reaction leads to a homogeneous distribution of
the CPE throughout the di-ureasil, whereas a post-synthesis solvent permeation route leads to the
formation of a con
fi
ned layer of the CPE at the di-ureasil surface. The CPE and the di-ureasil both function
as photoactive components, contributing directly to, and enhancing the optical properties of their
composite material. The bright blue photoluminescence exhibited by CPE-di-ureasils is reminiscent of the
parent CPE; however the distinct contribution of the di-ureasil to the steady-state emission pro
fi
le is also
apparent. This is accompanied by a dramatic increase in the photoluminescence quantum yield to >50%,
which is a direct consequence of the synergy between the two components. Picosecond time-correlated
single photon counting measurements reveal that the di-ureasil e
ff
ectively isolates the CPE chains, leading
to emissive trap sites which have a high radiative probability. Moreover, intimate mixing of the CPE and the
di-ureasil, coupled with their strong spectral overlap, results in e
ffi
cient excitation energy transfer from the
di-ureasil to these emissive traps. Given the simple, solution-based fabrication method and the structural
tunability of the two components, this approach presents an e
ffi
cient route to highly desirable CPE-hybrid
materials whose optoelectronic properties may be enhanced and tailored for a targeted application.
Author's Homepage:
http://people.tcd.ie/raevansDescription:
PUBLISHED
Author: EVANS, RACHEL
Type of material:
Journal ArticleCollections
Series/Report no:
Chemical Science;6;
12;
Availability:
Full text availableDOI:
http://dx.doi.org/10.1039/c5sc02409aISSN:
20416520Metadata
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