Title page for ETD etd-01162001-103454


Type of Document Master's Thesis
Author Trice, Brian Edward
Author's Email Address btrice@bellatlantic.net
URN etd-01162001-103454
Title Nonlinear Luminescence Quenching in Eu2O3
Degree Master of Science
Department Chemistry
Advisory Committee
Advisor Name Title
Tissue, Brian M. Committee Chair
Anderson, Mark R. Committee Member
Deck, Paul A. Committee Member
Keywords
  • Europium Oxide Lanthanide
Date of Defense 2000-12-14
Availability unrestricted
Abstract
Nonlinear Luminescence Quenching in Eu2O3

by

Brian Trice

ABSTRACT

Nonlinear 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.

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  00contents.PDF 14.97 Kb 00:00:04 00:00:02 00:00:01 < 00:00:01 < 00:00:01
  01chapter1.pdf 101.31 Kb 00:00:28 00:00:14 00:00:12 00:00:06 < 00:00:01
  02chapter2.pdf 104.63 Kb 00:00:29 00:00:14 00:00:13 00:00:06 < 00:00:01
  03chapter3.PDF 540.57 Kb 00:02:30 00:01:17 00:01:07 00:00:33 00:00:02
  04chapter4.pdf 11.71 Kb 00:00:03 00:00:01 00:00:01 < 00:00:01 < 00:00:01
  05Appendix.PDF 64.12 Kb 00:00:17 00:00:09 00:00:08 00:00:04 < 00:00:01
  06Vita.pdf 6.15 Kb 00:00:01 < 00:00:01 < 00:00:01 < 00:00:01 < 00:00:01
  Abstract.PDF 4.75 Kb 00:00:01 < 00:00:01 < 00:00:01 < 00:00:01 < 00:00:01

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