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dc.contributor.authorTrice, Brian Edwarden
dc.date.accessioned2014-03-14T20:30:43Zen
dc.date.available2014-03-14T20:30:43Zen
dc.date.issued2000-12-14en
dc.identifier.otheretd-01162001-103454en
dc.identifier.urihttp://hdl.handle.net/10919/30960en
dc.description.abstractNonlinear luminescence quenching has been documented in numerous systems such as organic crystals, rare earth insulators, laser materials, semiconductors, and phosphors. In each of these systems nonlinear luminescence quenching occurs under conditions of high excitation density from interactions between excited centers, the result is an additional nonradiative decay pathway that lowers luminescence quantum efficiency. During investigations into the spectra and dynamics of Eu2O3, an apparent saturation dip in the excitation spectra of nano-sized Eu2O3 particles was observed. This thesis describes the investigation into the nature of the saturation effect. The samples studied using luminescent spectroscopy included micron sized Eu2O3 crystals of both cubic and monoclinic phases, nanocrystal monoclinic Eu2O3, and a large fused crystal of monoclinic Eu2O3. It was determined that the saturation effect was due to nonlinear luminescence quenching occurring at the wavelengths of absorption maxima. The mechanism of nonlinear luminescence quenching was concluded to be upconversion by energy transfer.en
dc.publisherVirginia Techen
dc.relation.haspart04chapter4.pdfen
dc.relation.haspartAbstract.PDFen
dc.relation.haspart05Appendix.PDFen
dc.relation.haspart06Vita.pdfen
dc.relation.haspart03chapter3.PDFen
dc.relation.haspart00contents.PDFen
dc.relation.haspart02chapter2.pdfen
dc.relation.haspart01chapter1.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectEuropium Oxideen
dc.subjectLanthanidesen
dc.subjectFluorescenceen
dc.titleNonlinear Luminescence Quenching in Eu2O3en
dc.typeThesisen
dc.contributor.departmentChemistryen
dc.description.degreeMaster of Scienceen
thesis.degree.nameMaster of Scienceen
thesis.degree.levelmastersen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.disciplineChemistryen
dc.contributor.committeechairTissue, Brian M.en
dc.contributor.committeememberDeck, Paul A.en
dc.contributor.committeememberAnderson, Mark R.en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-01162001-103454/en
dc.date.sdate2001-01-16en
dc.date.rdate2002-03-06en
dc.date.adate2001-03-06en


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