Investigation of the optical properties of polyfluorene/ZnO nanocomposites

Zou, JP; Le Rendu, P; Musa, I; Yang, SH; Dan, Y; That, CT; Nguyen, TP

Investigation of the optical properties of polyfluorene/ZnO nanocomposites

Zou, JP Le Rendu, P Musa, I Yang, SH Dan, Y That, CT

Nguyen, TP

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Publication Type:: Journal Article
Citation:: Thin Solid Films, 2011, 519 (12), pp. 3997 - 4003
Issue Date:: 2011-04-01

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Field	Value	Language
dc.contributor.author	Zou, JP	en_US
dc.contributor.author	Le Rendu, P	en_US
dc.contributor.author	Musa, I	en_US
dc.contributor.author	Yang, SH	en_US
dc.contributor.author	Dan, Y	en_US
dc.contributor.author	That, CT https://orcid.org/0000-0003-3276-1739	en_US
dc.contributor.author	Nguyen, TP	en_US
dc.date.issued	2011-04-01	en_US
dc.identifier.citation	Thin Solid Films, 2011, 519 (12), pp. 3997 - 4003	en_US
dc.identifier.issn	0040-6090	en_US
dc.identifier.uri	http://hdl.handle.net/10453/18433
dc.description.abstract	Polyfluorene (PF) and its derivatives are very promising candidates for organic light emitting diodes (OLEDs) in lighting applications because of their high photoluminescence and electroluminescence efficiencies. Recent investigations of potential materials for OLEDs have shown that introducing n-type inorganic nanoparticles into conjugated polymers is efficient to produce stable and high performance devices. In this study, composite thin films made by incorporation of zinc oxide (ZnO) nanoparticles into a PF derivative have been prepared and their optical properties have been investigated. The prepared thin films were stored in different media (in air, in vacuum, in the dark or exposed to light) in order to study environmental influences on the material stability. Analysis of spectral data obtained from infrared (IR), Raman, UV-vis, and photoluminescence (PL) measurements shows a large enhancement in luminescence for polymer nanocomposites while using high nanoparticle concentrations (within a limit of 10% ZnO). Time-resolved PL performed on those nanocomposite films corroborated the above result: it indicated that the light-emission enhancement can be explained by efficient energy transfer from nanoparticles to the polymer chains and increase of the chain separation distance. In addition, the nanocomposites were found to be more stable than pristine polymer films whatever the storage conditions were used. It was confirmed by IR analysis that incorporation of nanoparticles into polymers prohibited the formation of fluorenonyl groups in PF chains, which was identified as the main cause of the degradation of the polymer under photo-oxidation. © 2011 Elsevier B.V. All rights reserved.	en_US
dc.relation.ispartof	Thin Solid Films	en_US
dc.relation.isbasedon	10.1016/j.tsf.2011.01.205	en_US
dc.subject.classification	Applied Physics	en_US
dc.title	Investigation of the optical properties of polyfluorene/ZnO nanocomposites	en_US
dc.type	Journal Article
utslib.citation.volume	12	en_US
utslib.citation.volume	519	en_US
utslib.for	1007 Nanotechnology	en_US
utslib.for	02 Physical Sciences	en_US
utslib.for	09 Engineering	en_US
utslib.for	10 Technology	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
utslib.copyright.status	closed_access
pubs.issue	12	en_US
pubs.publication-status	Published	en_US
pubs.volume	519	en_US

Abstract:

Polyfluorene (PF) and its derivatives are very promising candidates for organic light emitting diodes (OLEDs) in lighting applications because of their high photoluminescence and electroluminescence efficiencies. Recent investigations of potential materials for OLEDs have shown that introducing n-type inorganic nanoparticles into conjugated polymers is efficient to produce stable and high performance devices. In this study, composite thin films made by incorporation of zinc oxide (ZnO) nanoparticles into a PF derivative have been prepared and their optical properties have been investigated. The prepared thin films were stored in different media (in air, in vacuum, in the dark or exposed to light) in order to study environmental influences on the material stability. Analysis of spectral data obtained from infrared (IR), Raman, UV-vis, and photoluminescence (PL) measurements shows a large enhancement in luminescence for polymer nanocomposites while using high nanoparticle concentrations (within a limit of 10% ZnO). Time-resolved PL performed on those nanocomposite films corroborated the above result: it indicated that the light-emission enhancement can be explained by efficient energy transfer from nanoparticles to the polymer chains and increase of the chain separation distance. In addition, the nanocomposites were found to be more stable than pristine polymer films whatever the storage conditions were used. It was confirmed by IR analysis that incorporation of nanoparticles into polymers prohibited the formation of fluorenonyl groups in PF chains, which was identified as the main cause of the degradation of the polymer under photo-oxidation. © 2011 Elsevier B.V. All rights reserved.

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http://hdl.handle.net/10453/18433