The Research Training Group "Functionalisation of Semiconductors" deals with the development, characterisation and integration of novel materials on currently used semiconductors. In doing so, the capability of the synthesized complete system will be improved and new fields of application open up.
The research program of the Research Training Group aims amongst others in the integration of III/V-semiconductors on Si-substrates. This highly competitive field of research will revolutionize future applications in electronics and photonics. Until recently, for example, computer users expected an increasing speed of the machines with every computer generation. This is, however, due to fundamental physical limitations not possible any more in future. Therefore, the development of a laser on silicon substrate for inter- and intra-chip communication is one subject of the Research Training Group. The clock rates of silicon devices, which are functionalised in this way, can consequently speed up again. For the realization of this aim, research groups, which develop metal-organic molecules for deposition work closely with groups growing material as well as with groups, which examine the bonding of the molecules on the surface in theory as well as in experiment. Furthermore, groups, which characterise the structures structurally and optically are inolved in the research program. For the deposition as well as for the characterization of the structures, high-tech methods are applied.
A further topic of the Research Training Group is the synthesis of semiconductor nanoparticles and the integration of specific organic molecules on their surface. These nanoparticles will in turn be fixed on semiconductor surfaces by self-assembling monolayers. Using these structures, novel devices like position-sensitive, light-controlled switches are possible. A further field of application is the synthesis of molecular clusters, which have non-linear optical properties. Also in this topical area, inorganic chemists cooperate with semiconductor physicists and surface physicists in an interdisciplinary research program.
The doctoral students receive in this program, where research and education are adjusted to maximum benefit for them, a training, which prepares them optimally for carriers in academia and industry, respectively.
Overview of the project areas and projects of the RTG:
A: Layered Structures for the functionalisation of Si
||Synthesis and characterisation of precursors for the epitaxy of
|A2||Epitaxial growth of (BGa)(NAsP)-based heterostructures on silicon
|Stolz, Volz, Sundermeyer
|A3||Structure of metastable compound semiconductors on Si
|A4||Linear optical spectroscopy, relaxation and carrier transport
|Dynamical properties of metastable semiconductor heterostructures
||M. Koch, Chatterjee,
S. W. Koch
B: Nanoparticles for the functionalisation
|B1||Colloidal semiconductor nanoparticles
||Parak, Witte, Sundermeyer
|B2||Molecular clusters for the functionalisation of semiconductor
|B3||Composition and structure of nanoclusters
||Volz, Parak, Dehnen
||Optoelectronic properties of nanoclusters
M. Koch, S. W. Koch,
C: Understanding and control of the functionalisation
||Theoretical investigation of adsorption and dynamics of organic
|Tonner, S. W. Koch
|C2||Reaction kinetics and diffusion of adsorbates on Si(001)
||Höfer, Stolz, Witte
|C3||Deposition and characterisation of graphene-like layers on
S. W. Koch, Frenking,
||Functionalisation of semiconductor surfaces by covalenty bonded