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http://hdl.handle.net/10773/19275
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DC Field | Value | Language |
---|---|---|
dc.contributor.author | Willis-Fox, Niamh | pt |
dc.contributor.author | Marques, Ana-Teresa | pt |
dc.contributor.author | Arlt, Jochen | pt |
dc.contributor.author | Scherf, Ullrich | pt |
dc.contributor.author | Carlos, Luis D. | pt |
dc.contributor.author | Burrows, Hugh D. | pt |
dc.contributor.author | Evans, Rachel C. | pt |
dc.date.accessioned | 2017-12-07T19:07:06Z | - |
dc.date.available | 2017-12-07T19:07:06Z | - |
dc.date.issued | 2015 | pt |
dc.identifier.issn | 2041-6520 | pt |
dc.identifier.uri | http://hdl.handle.net/10773/19275 | - |
dc.description.abstract | Poly(fluorene) 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 confined 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 profile 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 effectively 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 efficient 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 efficient route to highly desirable CPE-hybrid materials whose optoelectronic properties may be enhanced and tailored for a targeted application. | pt |
dc.language.iso | eng | pt |
dc.publisher | ROYAL SOC CHEMISTRY | pt |
dc.relation | info:eu-repo/grantAgreement/EC/FP7/262348/EU | pt |
dc.relation | info:eu-repo/grantAgreement/FCT/5876/135966/PT | pt |
dc.relation | info:eu-repo/grantAgreement/FCT/5876/147332/PT | pt |
dc.rights | openAccess | por |
dc.subject | LIGHT-EMITTING-DIODES | pt |
dc.subject | PHOTO-CROSS-LINKING | pt |
dc.subject | ENERGY-TRANSFER | pt |
dc.subject | QUANTUM YIELDS | pt |
dc.subject | ORGANIC/INORGANIC HYBRIDS | pt |
dc.subject | SEMICONDUCTING POLYMER | pt |
dc.subject | HIGHLY EFFICIENT | pt |
dc.subject | RECENT PROGRESS | pt |
dc.subject | SILICA MATRIX | pt |
dc.subject | SOLAR-CELLS | pt |
dc.title | Synergistic photoluminescence enhancement in conjugated polymer-di-ureasil organic-inorganic composites | pt |
dc.type | article | pt |
dc.peerreviewed | yes | pt |
ua.distribution | international | pt |
degois.publication.firstPage | 7227 | pt |
degois.publication.issue | 12 | pt |
degois.publication.lastPage | 7237 | pt |
degois.publication.title | CHEMICAL SCIENCE | pt |
degois.publication.volume | 6 | pt |
dc.relation.publisherversion | 10.1039/c5sc02409a | pt |
dc.identifier.doi | 10.1039/c5sc02409a | pt |
Appears in Collections: | CICECO - Artigos |
Files in This Item:
File | Description | Size | Format | |
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Synergistic photoluminescence enhancement in conjugated polymer-di-ureasil organic-inorganic composites_10.1039c5sc02409a.pdf | 1.84 MB | Adobe PDF | View/Open |
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