Electronic Materials
Eugene E. Haller, Program Leader
The goal of the Electronic Materials Program is to advance the fundamental
understanding of the materials science of semiconductors. The
research focuses on the relationships between synthesis and processing
conditions and the structure, properties, and stability of semiconductor
materials systems. Progress in these areas is essential for
the performance and reliability of a number of technologies that
lie at the heart of the DOE mission including ultrahigh efficiency
photovoltaic energy conversion devices, high efficiency solid-state
sources of visible light, visual displays, and of a large variety
of sensors and power control systems for energy generation, conservation,
distribution and use. The following are the areas of current
emphasis:
Electronic Materials (funded
by DOE-BES-MS&EP)
- Solar cell materials: group III-nitrides and highly
mismatched semiconductor alloys
P.I.s: J.
W. Ager, O.
D. Dubon , E.
E. Haller, Z.
Liliental-Weber, W.
Walukiewicz, K.
M. Yu–Characterization and modeling of InN and GaN
and their alloys
–Application of InGaN alloys to high efficiency, multilayer
tandem solar cells
–Application of InGaN/oxide layered thin films
to corrosion-resistant photoelectrochemical cells for water-splitting
–Ultrahigh-efficiency
intermediate band solar cells
- Non-equilibrium growth of epitaxial films and nanostructures
P.I.s: J.
W. Ager, D.
C. Chrzan, E.
E. Haller, Z.
Liliental-Weber,
K. M. Yu
–Preparation
and characterization of group IV alloy nanocrystals by ion implantation
–Determination
of the kinetics of alloy order/disorder transitions and equilibrium
in silica embedded nanocrystals
- Isotopically controlled semiconductor structures
P.I.s: J.
W. Ager, E.
E. Haller
–Preparation of 28Si, 29Si, 30Si and other semiconductor
forming elements of increasing isotopic purity and the electronic,
vibrational, and spin spectroscopic studies of them
- Semiconductor spintronics
P.I.: O.
D. Dubon
–Ferromagnetism in GeMn and in Ga1-x MnxAs films
–Spatially
resolved hydrogen passivation of Mn in Ga1-x MnxAs
–Synthesis and
characterization of quaternary alloy Ga1-sMnxPyAs1-y
–Synthesis
of wafer-scale graphene from physical vapor processes
Non-DOE Funded Projects
- Development of Low Defect Density GaN and AlGaN for HBTs (Z.
Liliental-Weber, funded by Georgia Inst Tech)
- Cryogenic NTD-Ge Thermistor Research for CUORE (Cryogenic
Underground Observatory for Rare Events) (J. W. Beeman
and E.
E. Haller, funded by NSD-LBNL and University of Milan)
- Cryogenic Thermistor Development for the Edelweiss-II Experiment (J.
W. Beeman and E.
E. Haller, funded by French Atomic Energy Commission)
- Multiband Semiconductor Solar Cells (K.
M. Yu, funded by Rose Street Laboratory)
High Efficiency III-Nitride Tandem Cells (J.
W. Ager, funded by Rose Street Laboratory)
- Development of Large-format, Monolithic Far-Infrared Detector
Arrays (J. W. Beeman and E.
E. Haller, funded by Technoscience)
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