Current Research of Paul R. Berger, Professor
Currently Active Research Projects
- This is a collaborative effort involving the Ohio State University, the
Naval Research Laboratory (Dr. Phillip E. Thompson and Dr. Karl D. Hobart),
University of California at Riverside (Prof. Roger Lake).
This work has resulted in peak-to-valley current ratios (PVCR) up to
over 4.0 at room temperature and current densities which can be engineered
from ultra-low, below 20 mA/cm2, for memory applications, up
to ultra-high, to well over 200 kA/cm2, which are excellent for RF and
mixed-signal applications. See our
invention of the first Si-based resonant interband tunnel diode work and
a more generic tunnel diode process which was highlighted at
as well as our
Our device and process have now been replicated elsewhere around the world,
thus it is readily transferable.
Further news stories on this work are also available,
Wall Street Journal report (p. 1).
- PowerPoint Presentation of Our Resonant
Interband Tunneling Diode Work (January 2005)
Si Tunnel Diode and CMOS/HBT Integration Workshop
Sponsored by the SRC.
Minutes of the Si Tunnel Diode and CMOS/HBT Integration Workshop
(December 9, 1999)
- The organic conducting polymer project spans a variety of topical areas
to exploit the electronic and optoelectronic properties of organic conducting
polymers. Most of the work published to date at Ohio State pertains to polymeric
field effect transistors (PFET) and flexible organic gate dielectrics to be included
in the PFETs. Other ongoing work is exploring polymer light emitting diodes, polymer
solar cells and processing technologies. This area of research began as part of my
1998/1999 sabbatical leave, when I had the pleasure to work with three of the premier
research institutions in the world in this new field.
- This project will demonstrate the validity of nanoscale computing by developing a
process technology to fashion quantum dots of a predictable size, shape and placement,
suitable for mass production and simple electrical contact or sensing. Applications
include nanoscale resonant tunneling diodes (RTD), single-electron transistors (SET),
and quantum cellular automata (QCA).
- Strong interactions between Ohio State, Illinois, Notre Dame, UC Riverside, iand the
Naval Research Laboratory (Dr. Phillip E. Thompson)
will foster open discussion, dialogue, and interdisciplinary student
training. This proposal seeks to bring together electrical engineers, material scientists,
physicists, computer scientists, experimentalists, and theoreticians for the sole purpose
of realizing nanostructured quantum dot switching elements. Undergraduate research will
play a significant role at Ohio State and Notre Dame. The cross-disciplinary work and
site visits to each other will enhance the educational process.
- This project demonstrates Si-based sensors with high room temperature curvature coefficient
which is suitable for seamless integration with Si readout circuitry for passive millimeter-wave
detection of reflected RF energy for deetction of concealed weapons and pilot assistance through
rain, fog and smoke.
- This project examines quantum functional devices in the conjugated polymer system for molecular electronic devices and circuits.
Currently Non-Active Research Projects
- Novel SiGeCSn cubic alloys is ever expanding and takes
on many facets. See our GeC photodiode work highlighted at
Times, and if you are an IEEE member, check out the
IEEE Spectrum May 1998 issue (Innovations section, p. 72).
- The MSM photodiode work is currently on hold and is awaiting an interested
student to renew these efforts.
- It was shown that rare earth elements getter impurities within the liquid phase
epitaxial (LPE) melt and precipitate out as a slag that does not incorporate into the
epitaxial layer. Epitaxial growth quality and purity is greatly enhanced without any
measurable incorporation of rare earth elements into the epitaxial layer.
- The LPE study using rare earth treatments has now drawn to a successful conclusion.
CVD Growth of Nitrides Using Novel Organometallic Precursors
- The CVD nitride project
realized single crystalline, stoichiometric GaN. It was a collaborative
Theopold of the Chemistry Department at the University of Delaware.
Page last updated June 26, 2007.
Generally, the publications list and
conference list web pages are updated more frequently.
Paul R. Berger's homepage
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