Date of Award

2012

Document Type

Dissertation

Degree Name

Doctor of Philosophy (PhD)

First Advisor

Assefa, Zerihun

Abstract

This study reports the synthesis, characterization, and photoluminescence properties of a calcium tungstate/molybdate (CaWO4/MoO4) system, and the synthetic attempts of an agrellite (NaCa2Si4O10F) system. The objective is to modify the photoluminescence of both systems by doping with lanthanide/transition metal ions, and to convert them into phosphors with specific applications for light-emitting-diodes (LEDs).

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