Auflistung nach Schlagwort "Aluminum"

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  • Layer selective laser ablation for local contacts to thin emitters 
    Haase, Felix; Rojas, Enrique Garralaga; Bothe, Karsten; Brendel, Rolf (Amsterdam : Elsevier BV, 2011)
    High efficiency solar cells require high generation and low recombination rates. High bulk lifetime, well passivated surfaces, and lowly doped thin emitters allow for low recombination rates. Thin passivated emitters should ...
  • Mechanical properties of co-extruded aluminium-steel compounds 
    Thürer, Susanne Elisabeth; Uhe, Johanna; Golovko, Oleksandr; Bonk, Christian; Bouguecha, Anas; Behrens, Bernd-Arno; Klose, Christian (Pfaffikon : Scientific.Net, 2017)
    Within the scope of the Collaborative Research Centre (CRC) 1153 novel process chains for the production of hybrid solid components by Tailored Forming are developed at the Leibniz Universität Hannover. The combination of ...
  • Multiple scale modeling of Al2O3 thin film growth in an ion beam sputtering process 
    Turowski, Marcus; Jupé, Marco; Melzig, Thomas; Pflug, Andreas; Ristau, Detlev (Bellingham, WA : S P I E - International Society for Optical Engineering, 2015)
    A multiple scale model approach is presented in order to investigate Al2O3 thin film growth in the framework of an existing Ion Beam Sputtering (IBS) coating process. Therefore, several simulation techniques are combined ...
  • Numerical modelling and validation of thermally-induced spalling 
    Berardone, Irene; Kajari-Schröder, Sarah; Niepelt, Raphael; Hensen, Jan; Steckenreiter, Verena; Paggi, Marco (London : Elsevier Ltd., 2015)
    In order to reduce the silicon consumption in the production of crystalline silicon solar cells, the improvement of sawing techniques or the use of a kerf-less process are possible solutions. This study focuses on a ...
  • Numerical modelling of interaction between aluminium structure and explosion in soil 
    Chen, Jian-Yu; Feng, Dian-Lei; Lien, Fue-Sang; Yee, Eugene; Deng, Shu-Xin; Gao, Fei; Peng, Chong (Amsterdam [u.a.] : Elsevier Science, 2021)
    In this paper, a graphics processing unit-accelerated smoothed particle hydrodynamics solver is presented to simulate the three-dimensional explosions in soils and their damage to aluminium structures. To achieve this ...
  • On the Discrepancy in Simultaneous Observations of the Structure Parameter of Temperature Using Scintillometers and Unmanned Aircraft 
    Braam, Miranda; Beyrich, Frank; Bange, Jens; Platis, Andreas; Martin, Sabrina; Maronga, Björn; Moene, Arnold F. (Dordrecht : Springer Netherlands, 2016)
    We elaborate on the preliminary results presented in Beyrich et al. (in Boundary-Layer Meteorol 144:83–112, 2012), who compared the structure parameter of temperature (C2T) obtained with the unmanned meteorological mini ...
  • On the Propagation of Reaction Fronts in a Sandy Aquifer Over 20+ Years: Lessons From a Test Site in Northwestern Germany 
    Houben, Georg J.; Post, Vincent E. A.; Gröger-Trampe, Jens; Pesci, María H.; Sültenfuß, Jürgen ([New York] : Wiley, 2021)
    Despite reduction measures, nitrate and aluminum concentrations remain high in aquifers in northwestern Europe. To evaluate the effectiveness of groundwater protection policies, the long-term fate of these contaminants in ...
  • Recombination at local aluminum-alloyed silicon solar cell base contacts by dynamic infrared lifetime mapping 
    Müller, Jens; Bothe, Karsten; Gatz, Sebastian; Plagwitz, Heiko; Schubert, Gunnar; Brendel, Rolf (Amsterdam : Elsevier BV, 2011)
    The application of local aluminum (Al)-alloyed contacts to the p-type base of silicon solar cells reduces minority charge carrier recombination due to the formation of a local back surface field (LBSF). We study the ...
  • Reduced wear and adhesion forces by laser dispersing of ceramics 
    Nölke, C.; Claußen, S.; Dudziak, S.; Haferkamp, H.; Barcikowski, S. (Amsterdam : Elsevier B.V., 2010)
    Laser dispersing offers a great potential to fabricate layers or tracks with tailored properties threat duce abrasive or adhesive wear at the surface of highly stressed components. Different ceramic powder materials like ...
  • Sandwich rolling of twin-roll cast aluminium-steel clad strips 
    Stolbchenko, Mykhailo; Grydin, Olexandr; Nürnberger, Florian; Samsonenko, Andrii; Schaper, Mirko (Amsterdam : Elsevier, 2014)
    In the present study experimental results of twin-roll cast aluminium-steel clad strips of a thickness of 2.0 mm using the example of pure aluminium and an austenitic steel are presented. Electron probe measurements of the ...
  • Simulation of Spalling with a Non-planar Bi-layered Interface Due to the Reuse of the Substrate 
    Berardone, Irene; Hensen, Jan; Steckenreiter, Verena; Kajari-Schröder, Sarah; Paggi, Marco (London : Elsevier Ltd., 2016)
    Kerfless wafering techniques have the potential to reduce the cost of crystalline silicon (Si) in photovoltaics by saving material and production costs. Thermomechanical spallation from thick wafers with aluminium (Al) in ...
  • Simultaneous Contacting and Interconnection of Passivated Emitter and Rear Solar Cells 
    Schulte-Huxel, Henning; Petermann, Jan-Hendrik; Blankemeyer, Susanne; Steckenreiter, Verena; Kajari-Schröder, Sarah; Brendel, Rolf (London : Elsevier Ltd., 2016)
    The back end process of passivated emitter and rear cells (PERC) consists of at least one laser process and three screen-printing steps followed by the stringing and tabbing of the cells. To reduce the number of steps we ...
  • Solar cell emitter design with PV-tailored implantation 
    Ohrdes, Tobias; Steingrube, S.; Wagner, Hannes; Zechner, C.; Letay, G.; Chen, R.; Dunham, S.T.; Altermatt, Pietro P. (Amsterdam : Elsevier BV, 2011)
    A potentially cost-effective ion implanter for solar cells has become commercially available very recently. As the emitter dopant profiles differ from the standard diffusions, a combination of process simulation and device ...
  • Strontium doping in mullite-type bismuth aluminate: A vacancy investigation using neutrons, photons and electrons 
    Gesing, Thorsten M.; Schowalter, Marco; Weidenthaler, Claudia; Murshed, M. Mangir; Nénert, Gwilherm; Mendive, Cecilia B.; Curti, Mariano; Rosenauer, Andreas; Buhl, Josef-Christian; Schneider, Hartmut; Fischer, Reinhard X. (Cambridge : Royal Society of Chemistry, 2012)
    We report on strontium doped dibismuth-nonaoxoaluminate(III) produced at 1023 K. Partial substitution of bismuth by strontium in the structure yields oxygen vacancies for charge balance. Introducing oxygen vacancies ...
  • Thermomechanical Spalling of Epitaxially Grown Silicon from Porosified Substrates 
    Steckenreiter, Verena; Hensen, Jan; Knorr, Alwina; Niepelt, Raphael; Brendel, Rolf; Kajari-Schröder, Sarah (London : Elsevier Ltd., 2016)
    We combine two kerfless approaches to unite advantages of both processes: the epitaxial layer transfer based on porous silicon (PSI process) and the lift-off of a thin silicon layer from a substrate via controlled spalling ...
  • Towards a transportable aluminium ion quantum logic optical clock 
    Hannig, Stephan; Pelzer, L.; Scharnhorst, N.; Kramer, J.; Stepanova, M.; Xu, Z.T.; Spethmann, N.; Leroux, I.D.; Mehlstäubler, Tanja E.; Schmidt, Piet O. (American Institute of Physics : [S.l.], 2019)
    With the advent of optical clocks featuring fractional frequency uncertainties on the order of 10-17 and below, new applications such as chronometric leveling with few-centimeter height resolution emerge. We are developing ...