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HZB Repository
Institutional Repository
634 Publications
OpenAIRE 3.0 (OA, funding)
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  • Interface reactions and Kirkendall voids in metal organic vapor phase epitaxy grown Cu In,Ga Se2 thin films on GaAs

    Lei, C.H.; Rockett, A.A.; Robertson, I.M.; Papathanasiou N.; Siebentritt, S (2006)
    Cu In1 xGax Se2 CIGS films were grown on 001 GaAs at 570 C or 500 C by means of metalorganic vapor phase epitaxy. All films were Cu rich [Cu In Ga gt;1] with pseudomorphic Cu2Se second phases found only on the growth surface. During growth, diffusion of Ga from the substrate and vacancies generated by the formation of CIGS from Cu2Se at the surface occurred. The diffusion processes lead to the formation of Kirkendal voids at the GaAs CIGS interface. Transmission electron microscopy...

    In situ SyXRD Analysis of Cement Hydration on the ms Scale

    Schlegel, M. C.; Sarfaz, A.; Müller, U.; Panne, U.; Emmerling, F (2013)
    The backbone of our infrastructure and modern architecture are cementitious materials. Despite their substantial role for the society and their common involvement in the built environment, basic aspects of the hydration processes of cement are still not understood. During the first seconds of a building s life, highly dynamic reaction processes prevail. The reactions have a direct influence on the properties of the final building. Typically, these reactions are actively influenced by organic ...

    Time resolved X ray absorption spectroscopy of infrared laser induced temperature jumps in liquid water

    Gavrila, G.; Godehusen, K.; Weniger, C.; Nibbering, E.T.J.; Elsaesser, T.; Eberhardt, W.; Wernet, P (2009)
    A time resolved X ray absorption study of the structural dynamics of liquid water on a picosecond timescale is presented. We apply femtosecond midinfrared pulses to resonantly excite the intramolecular O H stretching band of liquid water and monitor the transient response in the oxygen K edge absorption spectrum with picosecond X ray pulses. In this way, structural changes in the hydrogen bond network of liquid water upon an ultrafast temperature jump of approximately 20 K are investi...

    BENSC experimental reports 2005

    Hahn Meitner Institut Berlin Berlin Neutron Scattering Center. Denzer, K.; Brandt, A.; Tovar, M.; Graf, H.A. [Eds.] (2006)

    Struktur und Gitterdynamik von Gruppe V Elementen in ZnO

    Friedrich, F (2010)
    Ziel der vorliegenden Arbeit war eine grundlegende und systematische Aufklärung der Mechanismen, die eine stabile p Dotierung von ZnO verhindern. In diesem Zusammenhang wurde eine Kompensation durch Verunreinigungen, aber auch die Bildung von Defektkomplexen und Phasenausscheidungen, die vor allem die Dotiereffizienz herabsetzen, diskutiert. Bezüglich der elektrischen Kompensation durch Verunreinigungen wurde eine Ersetzung der üblichen Saphir Substrate, aus denen Al Atome als Donatoren in d...
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