Browsing by Subject "Efficiency"

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  • Gatz, Sebastian; Bothe, Karsten; Müller, Jens; Dullweber, Thorsten; Brendel, Rolf (Amsterdam : Elsevier BV, 2011)
    In this paper, we investigate the surface recombination of local screen-printed aluminum contacts applied to rear passivated solar cells. We measure the surface recombination velocity by microwave-detected photoconductance ...
  • Saklayen, Nabiha; Kalies, Stefan; Madrid, Marinna; Nuzzo, Valeria; Huber, Marinus; Shen, Weilu; Sinanan-Singh, Jasmine; Heinemann, Dag; Heisterkamp, Alexander; Mazur, Eric (Washington, DC : Optical Society of America, 2017)
    Laser-exposed plasmonic substrates permeabilize the plasma membrane of cells when in close contact to deliver cell-impermeable cargo. While studies have determined the cargo delivery efficiency and viability of laser-exposed ...
  • Steinhauser, Georg (London : Elsevier Ltd, 2016)
    The purpose of this study was to assess whether or not the food monitoring campaign after the Fukushima nuclear accident has been successful in reducing the number of above-limit-food from reaching the consumers. The ...
  • Durán, Maria Carolina; Willenbrock, Saskia; Barchanski, Annette; Müller, Jessika-M.V.; Maiolini, Arianna; Soller, Jan T.; Barcikowski, Stephan; Nolte, Ingo; Feige, Karsten; Murua Escobar, Hugo (London : Biomed Central, 2011)
    Background: Reproducibly high transfection rates with low methodology-induced cytotoxic side effects are essential to attain the required effect on targeted cells when exogenous DNA is transfected. Different approaches and ...
  • Schmitz, O.; Hampel, S.K.; Eul, H.; Schwingshackl, D. (Göttingen : Copernicus GmbH, 2007)
    As a tradeoff between efficiency and costs modern communication systems contain a variety of components that can at least be considered weakly nonlinear. A critical element in evaluating the degree of nonlinearity of any ...
  • Li, Jichao; Du, Juan; Nan, Xi; Liu, Le; Lin, Feng (London : SAGE Publications Ltd., 2016)
    Compact self-recirculating injection that bleeds air from the casing downstream of a rotor blade row and injects the air as a wall jet upstream of the same rotor blade row is experimentally studied after the elaborated ...
  • Held, Marcel Philipp; Lachmayer, Roland (Bellingham, WA : S P I E - International Society for Optical Engineering, 2017)
    High-resolution vehicle headlamps represent a future-oriented technology that can be used to increase traffic safety and driving comfort. As a further development to the current Matrix Beam headlamps, LED-based pixel light ...
  • Chen, Genglin; Xu, Wei; Zhao, Jinyun; Zhang, Haipeng (Basel : MDPI AG, 2018)
    The current paper mainly focuses on finding a more appropriate way to enhance the fan performance at off-design conditions. The centrifugal fan (CF) based on flap-Adjustment (FA) has been investigated through theoretical, ...
  • Knöchelmann, Marvin; Kloppenburg, Gerolf; Lachmayer, Roland (Bellingham, WA : SPIE - International Society for Optical Engineering, 2018)
    Glare avoidance and marking lights are two of the many functionalities offered by advanced automotive headlamps such as Matrix-LED systems. DMD-based headlamps offer resolution enhancements to these two adaptive lighting ...
  • Min, Byungsul; Kruse, Christian; Schinke, Carsten; Wolf, Martin; Müller, Matthias; Sträter, Hendrik; Wagner, Matthias; Bothe, Karsten; Brendel, Rolf (London : Elsevier Ltd., 2017)
    This paper investigates process-induced variations of the open-circuit voltage (Voc) using voltage-dependent quantum efficiency measurements. By means of device modelling we show that this method is able to explain the Voc ...
  • Shaaban, S.; Seume, Jörg R. (New York, NY : Hindawi Publishing Corporation, 2012)
    Turbocharger performance significantly affects the thermodynamic properties of the working fluid at engine boundaries and hence engine performance. Heat transfer takes place under all circumstances during turbocharger ...
  • Titova, Valeriya; Schmidt, Jan (College Park, MD : American Institute of Physics, 2018)
    We examine two different silicon solar cell designs featuring full-area electron-selective contacts based on ultrathin (2-3 nm) titanium oxide (TiOx) films deposited by atomic layer deposition. The first cell design applies ...
  • Grönman, Aki; Biester, Marc H.-O.; Turunen-Saaresti, Teemu; Jaatinen-Värri, Ahti; Backman, Jari; Seume, Jörg R. (London : SAGE Publications Ltd., 2016)
    More efficient and physically smaller axial turbine designs are promoted to lower emissions and increase revenue. The physical size and the weight of the axial turbine can be minimised by adjusting the distance between ...
  • Stang, Johann-Christoph; Hendrichs, Max-Sebastian; Merkle, Agnes; Peibst, Robby; Stannowski, Bernd; Korte, Lars; Rech, Bernd (London : Elsevier Ltd., 2017)
    We report on two different approaches to fabricate interdigitated back contact silicon heterojunction solar cells without using indium tin oxide (ITO). The standard ITO/Ag backend is either modified by replacing ITO with ...
  • Chatzizyrli, Elisavet; Tinne, Nadine; Lachmayer, Roland; Neumann, Jörg; Kracht, Dietmar (Bellingham, WA : S P I E - International Society for Optical Engineering, 2017)
    The development of laser-based lighting systems has been the latest step towards a revolution in illumination technology brought about by solid-state lighting. Laser-activated remote phosphor systems produce white light ...
  • Moghaddamnia, Sanam; Waal, Albert; Fuhrwerk, Martin; Le, Chung; Peissig, Jürgen (New York : Springer International Publishing, 2016)
    Digital Radio Mondiale (DRM) is the universally, openly standardized digital broadcasting system for all frequencies including LW, MW, and SW as well as VHF bands. Alongside providing high audio quality to listeners, DRM ...
  • Jupé, Marco; Willemsen, Thomas; Malobabic, Sina; Schuba, Kornelia; Ristau, Detlev (Bellingham, WA : S P I E - International Society for Optical Engineering, 2015)
    During the last years, optical low loss components gained more and more industrial interest and led to novel approaches for the production in optical coating technology. The application of filtered deposition technologies ...
  • Zielke, Dimitri; Niehaves, Claudia; Lövenich, Wilfried; Elschner, Andreas; Hörteis, Matthias; Schmidt, Jan (Amsterdam : Elsevier, 2015)
    Aftera briefreview of therecent evolvement oforganic-silicon heterojunction solar cells,we present here our latest measurements of the saturation current densities (J0) and contact resistances (RC) of crystalline silicon ...
  • Mitchell, Bernhard; Wagner, Hannes; Altermatt, Pietro P.; Trupke, Thorsten (Amsterdam : Elsevier, 2013)
    We present a model for predicting the solar cell efficiency potential of multicrystalline silicon bricks prior to sawing. Three model inputs are required: bulk lifetime images from the side faces of the bricks, the cell ...
  • Poll, G.; Kruse, T.; Meyer, C. (London : SAGE Publications Ltd., 2006)
    The efficiency of belt-type continuously variable transmission (CVT) - apart from the power consumption of auxiliary systems such as hydraulics - predominantly depends on the energy dissipated during sliding at the belt-disc ...