Full-color phosphors from amine-functionalized crosslinked hybrids lacking metal activator ions

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorCarlos, Luís D.
dc.creatorSá Ferreira, Rute A.
dc.creatorDe Zea Bermudez, Verónica
dc.creatorRibeiro, Sidney José Lima
dc.date2014-05-27T11:20:15Z
dc.date2016-10-25T18:16:59Z
dc.date2014-05-27T11:20:15Z
dc.date2016-10-25T18:16:59Z
dc.date2001-04-01
dc.date.accessioned2017-04-06T00:59:19Z
dc.date.available2017-04-06T00:59:19Z
dc.identifierAdvanced Funtional Materials, v. 11, n. 2, p. 111-115, 2001.
dc.identifier1616-301X
dc.identifierhttp://hdl.handle.net/11449/66482
dc.identifierhttp://acervodigital.unesp.br/handle/11449/66482
dc.identifier10.1002/1616-3028(200104)11:2<111::AID-ADFM111>3.0.CO;2-V
dc.identifierWOS:000169587200004
dc.identifier2-s2.0-0035314399
dc.identifierhttp://dx.doi.org/10.1002/1616-3028(200104)11:2<111::AID-ADFM111>3.0.CO;2-V
dc.identifierhttp://onlinelibrary.wiley.com/doi/10.1002/1616-3028%28200104%2911:2%3C111::AID-ADFM111%3E3.0.CO;2-V/abstract
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/888048
dc.descriptionSol-gel derived hybrids that contain OCH2CH2 (polyethylene glycol, PEG) repeat units grafted onto a siliceous backbone by urea, -NHC(=O)NH-, or urethane, -NHC(=O)O-, bridges have been prepared. It is demonstrated that the white light PL of these materials results from an unusual convolution of a longer lived emission that originates in the NH groups of the urea/urethane bridges with shorter lived electron-hole recombinations occurring in the nanometer-sized siliceous domains. The PL efficiencies reported here (maximum quantum yields at room temperature of ≈ 0.20 ± 0.02 at a 400 nm excitation wavelength) are in the same range as those for tetramethoxysilane-formic acid, and APTES-acetic acid, sol-gel derived phosphors. The high quantum yields combined with the possibility of tuning the emission to colors across the chromaticity diagram present a wide range of potential applications for these hybrid materials.
dc.languageeng
dc.relationAdvanced Funtional Materials
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectAmines
dc.subjectCrosslinking
dc.subjectElectrons
dc.subjectGrafting (chemical)
dc.subjectMolecular weight
dc.subjectOrganic acids
dc.subjectPhotoluminescence
dc.subjectPolyethylene glycols
dc.subjectQuantum theory
dc.subjectSol-gels
dc.subjectUrea
dc.subjectChromaticity
dc.subjectElectron-hole recombination
dc.subjectFormic acid
dc.subjectQuantum yield
dc.subjectTetramethoxysilane
dc.subjectUrethane
dc.subjectPhosphors
dc.titleFull-color phosphors from amine-functionalized crosslinked hybrids lacking metal activator ions
dc.typeOtro


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