Oregon State University
Currently, there are three PTCOE-related programs of research being conducted
Ongoing flat panel display related projects:
- Thin-Film Electroluminescence (TFEL) Characterization and Modeling
J. F. Wager, S. M. Goodnick and T. K. Plant
Department of Electrical and Computer Engineering, Oregon State University
Electrical and electro-optic characterization, aging studies and device
physics, SPICE, and Monte Carlo high-field transport modeling are employed
in the analysis of TFEL materials and devices to elucidate the underlying
chemistry and physics of operation of these devices in order to aid in the
development of higher brightness, stable, full-color TFEL flat-panel
- Halide Transport Chemical Vapor Deposition (HTCVD) of ZnS:Mn Films
Milo D. Koretsky
Department of Chemical Engineering, Oregon State University
The deposition of electroluminescent films (initially ZnS:Mn) in a modular,
home-built Halide Transport Chemical Vapor Deposition (HTCVD) reactor is
being investigated. The goal is to employ reactor design, numerical
simulation and species concentration measurements to explore the
processing-structure-performance relationship of the phosphor films. This
study is intended to provide insight into the mechanism of aging in the
ZnS:Mn films and to access the commercial viability of the HTCVD process.
- Novel Phosphor Synthesis
Department of Chemistry, Oregon State University
Work is directed to the discovery and production of new phosphors. Emphasis
is being placed on the synthesis of oxide hosts that may yield green or
red Eu2+ or Ce3+ emission. Relationships between crystal structure and
VUV excitation efficiency of PDP phosphors are being studied. Also, the
characteristic luminescence of compounds such as ZnGa2O4 and ZnGa2-xScO4
that crystallize in spinel or YbFe2O4 type structures are being examined
as potential FED materials.
Other display related projects in the Electrical Engineering department
include the following:
- Characterization and modeling of devices and circuits for head mounted
- Laser assisted crystallization of amorphous silicon for AMLCDs.
Characterization of TFTs fabricated on laser crystallized polysilicon. Study of
relationship between TFT behavior and the silicon process conditions.
- Study of atomic layer epitaxy (ALE) for growth of phosphors and insulators
for electroluminescent displays.
- Investigation of quantum well electroluminescent phosphors. This is a new
concept in phosphors where the objective is to utilize quantum well
confined excitations to produce the radiation, rather than the dopants or
activators which are the source of light in traditional phosphors.
Field Emission: Investigation of carbon nanotubes as a source of field
emission (Prof. T. Bell)
Liquid Crystals: Ferroelectric liquid crystals (Prof. Rananavare)
Reliability: Reliability modeling of flat panel displays (Prof. Berglund)
Further information on these research projects can be accessed from the
following home page: http://www.eeap.ogi.edu
. Look under Flat Panel Display Research Group.
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