Research
1. III-V nanowires for photonic and photovoltaic applications (since fall 2006)
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In 2006 profs. Weman and
Fimland initiated a project on the
growth and fabrication of GaAs based nanowires grown by
Au-catalyzed molecular beam epitaxy (MBE). Structural properties are studied
by SEM and (HR)TEM. Optical properties of
individual nanowires are studied by low temperature micro photoluminescence,
as well as by nano-optical techniques using scanning confocal microscopy and scanning near-field optical
microscopy. The long term goal is to process nanowires into different
photonic devices like nanowire solar cells, emitters (lasers, single-photon sources), and
sensors.
The research is mainly supported by external funding
through the projects: |
Fig.1. Schematic drawing of the Au-catalytic VLS growth of a single GaAs nanowire.
Fig.2.
Scanning electron microscope image of GaAs nanowires grown at NTNU.
Fig.3. Schematic pricture of a GaAsSb/GaAs core-shell nanowire based solar cell.
See our poster from a recent conference presentation (240 kB pdf-file)
2. ZnO nanowires for organic/inorganic solar cell applications (since fall 2007)
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The main objective of this project is to establish an improved understanding of organic/inorganic interfaces and to engineer
interfaces that promote efficient organic/inorganic solar cells. The
inorganic planar and nanostructured (nanorods/nanowires)
oxide thin films (ZnO and other oxides) will be grown by by pulsed laser deposition (PLD). This project is done in close collaboration with
SINTEF Materials and Chemistry
(Trondheim, Norway) and Prof. R. Collins at the
Center for Solar and Electronic Materials
at the Colorado School of Mines, USA. The project is mainly supported by the Research Council of Norway through the NANOMAT project: Nanostructured oxide thin films for organic/inorganic solar cell applications, during 2007-2011. |
See our poster from a
recent conference presentation (2.3 MB pdf-file)
Editor: Helge Weman, Last updated: May 4, 2012