Electronic Material Properties - und Geowissenschaften ...

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Publications Fleissner, A.; Schmid, H.; Melzer, C.; Schmechel, R.; von Seggern, H.; Transition from Non-Dispersive to Dispersive Hole Transport in a Small Molecule Organic Semiconductor Controlled by Molecular Doping, MRS Proceedings 965E (2006) S14 Hesse, S.; Zimmermann, J.; von Seggern, H.; Ehrenberg, H.; Fuess, H.; Fasel, C.; Riedel, R.; CsEuBr3: Crystal structure and its role in the photostimulation of CsBr : Eu 2+ , J. Appl. Phys. 100 (2006) 083506 Neumann, F.; Genenko, Y. A.; Melzer, C.; von Seggern, H.; Self-consistent theory of unipolar charge-carrier injection in metal/insulator/metal systems, J. Appl. Phys. 100 (2006) 084511 Benson, N.; Schidleja, M.; Melzer, C.; Schmechel, R.; von Seggern, H.; Complementary organic field effect transistors by ultraviolet dielectric interface modification, Appl. Phys. Lett. 89 (2006) 182105 Benson, N.; Ahles, M.; Schidleja, M.; Gassmann, A.; Mankel, E.; Mayer, T.; Melzer, C.; Schmechel, R.; von Seggern, H.; Organic CMOS technology by interface treatment, Proc. SPIE 6336 (2006) 63360S Olivati, C. A.; Carvalho, A. J. F.; Balogh, D. T.; von Seggern, H.; Faria, R. M.; Effect of ion concentration of ionomer in electron injection layer of polymer light-emitting devices, J. Non-Cryst. Solids 352 (2006) 1686 Zhou, Y.; Yan, X.; Kroke, E.; Riedel, R.; Probst, D.; Thissen, A.; Hauser, R.; Ahles, M.; von Seggern, H.; Deposition temperature effect on the structure and optical property of RF- PACVD-derived hydrogenated SiCNO film, Mat.-wiss. u. Werkstofftech. 37 (2006) 173 Hu, Z.; von Seggern, H.; Breakdown-induced polarization buildup in porous fluoropolymer sandwiches: a thermally stable piezoelectret, J. Appl. Phys. 99 (2006) 024102 Neumann, F.; Genenko, Y. A.; von Seggern, H.; The Einstein relation in systems with trapcontrolled transport, J. Appl. Phys. 99 (2006) 013704 - 22 -
Surface Science The surface science division of the institute of materials science uses advanced surface science techniques to investigate surfaces and interfaces of materials and materials combinations of technological use. For this purpose integrated UHV-systems have been built up which combine different surface analytical tools (photoemission, electron diffraction, ion scattering, scanning probe techniques) with the preparation of thin films (thermal evaporation, close-spaced sublimation, magnetron sputtering, MOCVD) and interfaces. The main research interest is directed to devices using polycrystalline compound semiconductors and interfaces between dissimilar materials. The perspectives of energy conversion (e.g. solar cells) or storage (intercalation batteries) devices are of special interest. In addition, the fundamental processes involved in chemical and electrochemical device engineering and oxide thin films for electronic applications are investigated. The main research areas are: • Electrochemical Interfaces The aim of this research activity is the better understanding of electrochemical interfaces and contact formation. In addition, empirically derived (electro-) chemical processing steps as the controlled modification and structuring of materials is investigated and further optimized. In the center of our interest are semiconductor/electrolyte contacts • Intercalation Batteries The aim of this research activity is the better understanding of electronic properties of Li-intercalation batteries and of their degradation phenomena. Typically all solid state batteries are prepared and investigated using sputtering and CVD techniques for cathodes and solid electrolytes. In addition, the solid-electrolyte interface and synthetic surface layers are investigated as well as composite systems for increasing the capacity. • Thin film solar cells The aim of this research activity is the testing and development of novel materials and materials combinations for photovoltaic applications. In addition, the interfaces in microcrystalline thin film solar cells are to be characterized on a microscopic level to understand and to further improve the empirically based optimisation of solar cells. • Organic-inorganic interfaces and composites In this research area we are aiming at the development of composites marterials for (opto-)electronic applications. The decisive factors, which govern the electronic properties of interfaces between organic and inorganic materials are studied. • Oxide thin films for electronic applications The aim of this research area is to understand electronic surface and interfaces properties of oxides. We are mainly interested in transparent conducting oxide electrodes for solar cells and organic LEDs but also in dielectric and ferroelectric perovskites. - 23 -
Page 1: ANNUAL REPORT 2 0 0 6 FACULTY OF MA
Page 4 and 5: Annual Report 2006 Faculty 11 Mater
Page 6 and 7: Preface The year 2006 of the Depart
Page 8 and 9: difference of numerical and analyti
Page 10 and 11: Institute of Materials Science Phys
Page 12 and 13: Research Projects Bulk Amorphous Al
Page 14 and 15: el Dsoki, C.; Landersheim, V. ; Kau
Page 16 and 17: Das, J.; Kim, K. B.; Xu, W.; Wei, B
Page 18 and 19: Staff Members Head Prof. Dr. Jürge
Page 20 and 21: Zhou L.; Rixecker G.; Aldinger F.;
Page 22 and 23: concerned with the synthesis and ch
Page 26 and 27: • Surface analysis The UHV-surfac
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Page 30 and 31: Thin films The Thin Film division w
Page 32 and 33: Berky, W.; Gottschalk, S.; Elliman,
Page 34 and 35: Guest Scientists Research Projects
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Page 38 and 39: Structure Research The research in
Page 40 and 41: Research Projects Functional Advanc
Page 42 and 43: Dincer, I.; Elerman, Y.; Elmali, A;
Page 44 and 45: hexakis(imidazole)nickel(II)bis(for
Page 46 and 47: Chemical Analytics The chemical ana
Page 48 and 49: Collaborations The above mentioned
Page 50 and 51: Hoffmann, P.; Non-Invasive Identifi
Page 52 and 53: Ferroelectrics For this class of ma
Page 54 and 55: Materials Modelling The research ac
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Page 64 and 65: The glass transition temperature (T
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Page 70 and 71: Fig. 2 shows the time dependencies
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∆V C q th eff 12 −2 p ( VGS = 0
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Fig. 3: Schematic of the photovolta
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synthesis and analysis of interface
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Fig. 2: Resistivity vs temperature
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Fig. 2: X-ray appearance near-edge
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Capacity [mAhg -1 ] 700 600 500 400
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Texture investigations and field em
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screening effects. Gold coating of
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Figure 2 shows a selected region of
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The spectrum shows that apart from
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The effect of crystallinity on the
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Electrochemical investigation and c
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This phenomenon can be understood c
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∆ = 0 − exhibiting dominance of
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constituents. The requirement of va
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In order to assess the influence of
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In this study, we have therefore de
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Fig. 1: Proposed models for a) Pt,
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Synthesis of oxide-polymer nanocomp
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Diploma Theses Böhme, Mario; Herst
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Sperling, Sebastian; Untersuchungen
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Institute of Applied Geosiences Phy
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Research Projects Geomorphology and
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Engineering Geology Engineering Geo
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Investigation of a Doline in NE-Hes
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Applied Sedimentology Sedimentary r
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econstruction.(Diploma thesis in co
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Darmstadt University of Technology
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Geomaterials Science Geomaterial Sc
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Gregori, G.; Kleebe H.-J.; Sorarù,
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Hessische Industriemüll GmbH). Due
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Technical Personnel Josef Kolb, Dip
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Research Projects Environmental sca
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Fig. 1: Aerial photo of the Lake Li
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Lithological Map of the Japanese Ar
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tower stripping, and therefore much
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Diffusion and reaction in micro- an
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Rift dynamics, uplift and climate c
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Geology, land use change and erosio
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nearly half a century has been perf
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The Effect of LiF Addition on the S
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In case of the undoped sintered B6O
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Microstructures in Omphacite and Ot
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Modelling phase-assemblage diagrams
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As an example, Fig. 2 shows the che
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MATERIALS SCIENCE Physical Metallur
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