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Auflistung nach Schlagwort "Aluminum"

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Advances in the surface passivation of silicon solar cells

Schmidt, Jan; Werner, Florian; Veith, Boris; Zielke, Dimitri; Steingrube, S.; Altermatt, Pietro P.; Gatz, Sebastian; Dullweber, Thorsten; Brendel, Rolf (Amsterdam : Elsevier BV, 2012)

The surface passivation properties of aluminium oxide (Al 2O 3) on crystalline Si are compared with the traditional passivation system of silicon nitride (SiN x). It is shown that Al 2O 3 has fundamental advantages over ...
Aluminium localization in root tips of the aluminium-accumulating plant species buckwheat (Fagopyrum esculentum Moench)

Klug, Benjamin; Specht, André; Horst, Walter J. (Oxford : Oxford University Press, 2011)

Aluminium (Al) uptake and transport in the root tip of buckwheat is not yet completely understood. For localization of Al in root tips, fluorescent dyes and laser ablation inductively coupled plasma mass spectrometry ...
Analysis and correction of systematic height model errors

Jacobsen, Karsten (Göttingen : Copernicus GmbH, 2016)

The geometry of digital height models (DHM) determined with optical satellite stereo combinations depends upon the image orientation, influenced by the satellite camera, the system calibration and attitude registration. ...
Analysis of local Al-doped back surface fields for high efficiency screen-printed solar cells

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 ...
Comparison of the thermal stability of single Al2O3 layers and Al2O3/SiNx stacks for the surface passiviation of silicon

Veith, Boris; Werner, Florian; Zielke, Dimitri; Brendel, Rolf; Schmidt, Jan (Amsterdam : Elsevier BV, 2011)

We measure surface recombination velocities (SRVs) below 10 cm/s on low-resistivity (1.4 Ωcm) p-type crystalline silicon wafers passivated with plasma-assisted and thermal atomic layer deposited (ALD) aluminium oxide (Al2O3) ...
Cutting inserts made of glass and glass ceramics

Breidenstein, Bernd; Müller-Cramm, Dominik; Vogel, Nils ([Cham] : Springer International Publishing, 2021)

Against the background of the increasing cost and scarcity of raw materials that are required for the manufacture of cutting tools, the question of alternative cutting materials arises. Glasses and glass ceramics represent ...
Determination of the Contact Resistivity of Screen-printed Al Contacts Formed by Laser Contact Opening

Kranz, Christopher; Lim, Bianca; Baumann, Ulrike; Dullweber, Thorsten (London : Elsevier Ltd., 2015)

Next-generation industrial PERC solar cells typically include local laser contact opening (LCO) of a dielectric passivation layer stack at the rear side and subsequent full-area aluminum screen printing and firing. In this ...
Development of polygon forming processes for aerospace engineering

Müller, Philipp; Behrens, Bernd-Arno; Hübner, Sven; Jepkens, Jan; Wester, Hendrik; Lautenbach, Sven (Millersville, PA : Materials Research Forum LLC, 2023)

The focus of this research lays on the further development of the Polygon Forming Technology, which is already successfully used for cold forming components in the aerospace industry. One example is the fuselage shell of ...
Differences in aluminium accumulation and resistance between genotypes of the genus Fagopyrum

Klug, B.; Kirchner, Thomas W.; Horst, Walter Johannes (Basel : MDPI AG, 2015)

Aluminium (Al) toxicity is a major factor reducing crop productivity worldwide. There is a broad variation in intra- and inter-specific Al resistance. Whereas the Al resistance mechanisms have generally been well explored ...
Enhancement of the interface of friction welded steel-aluminium joints

Behrens, Bernd-Arno; Duran, Deniz; Matthias, Tim; Ross, Ingo (Berlin : Springer, 2020)

Lightweight multi-material components are of great importance for the transport industry. Not only the component’s weight can be decreased, but also its local properties can be adapted to different loading profiles. Tailored ...
Flat plate aluminum heat pipe collector with inherently limited stagnation temperature

Jack, Steffen; Parzefall, Johannes; Luttmann, Thomas; Janßen, Philipp; Giovannetti, Federico (London : Elsevier Ltd., 2014)

This paper presents a new flat plate collector technology based on heat pipes. The use of heat pipes can lead to several advantages over direct flow collectors: A simple hydraulic interconnection, an inherently limited ...
Formation of locally aluminum-doped p-type silicon regions by in-line high-rate evaporation

Mader, Christoph; Bock, Robert; Müller, Jens; Schmidt, Jan; Brendel, Rolf (Amsterdam : Elsevier BV, 2011)

Locally aluminum-doped p-type silicon regions are formed by in-line high-rate evaporation of aluminum. We deposit aluminum layers of 28 μm thickness at dynamic deposition rates of 20 μm×m/min on locally laser-ablated Al2O3 ...
High-power laser welding of thick steel-aluminum dissimilar joints

Lahdo, Rabi; Springer, André; Pfeifer, Ronny; Kaierle, Stefan; Overmeyer, Ludger (Amsterdam : Elsevier B.V., 2016)

According to the Intergovernmental Panel on Climate Change (IPCC), a worldwide reduction of CO2-emissions is indispensable to avoid global warming. Besides the automotive sector, lightweight construction is also of high ...
High-rate atomic layer deposition of Al2O3 for the surface passivation of Si solar cells

Werner, Florian; Stals, Walter; Görtzen, Roger; Veith, Boris; Brendel, Rolf; Schmidt, Jan (Amsterdam : Elsevier BV, 2011)

High-rate spatial atomic layer deposition (ALD) enables an industrially relevant deposition of high-quality aluminum oxide (Al2O3) films for the surface passivation of silicon solar cells. We demonstrate a homogeneous ...
High-resolution 27Al MAS NMR spectroscopic studies of the response of spinel aluminates to mechanical action

Šepelák, Vladimir; Bergmann, Ingo; Indris, Sylvio; Feldhoff, Armin; Hahn, Horst; Becker, Klaus-Dieter; Grey, Clare P.; Heitjans, Paul (Cambridge : Royal Society of Chemistry, 2011)

The response of the local structure of various types of spinel aluminates, ZnAl2O4 (normal spinel), MgAl2O4 (partly inverse spinel), and Li0.5Al2.5O4 (fully inverse spinel), to mechanical action through high-energy milling ...
The influence of storage and heat treatment on a magnesium-based implant material: An in vitro and in vivo study

Bracht, Katja; Angrisani, Nina; Seitz, Jan-Marten; Eifler, Rainer; Weizbauer, Andreas; Reifenrath, Janin (London : BioMed Central Ltd., 2015)

Background: Magnesium alloys are recommended as a potential material for osteosynthesis. It is known that storage-induced property modifications can occur in materials like aluminum. Thus the aim of this study was to analyze ...
Influences on the formability and mechanical properties of 7000-aluminum alloys in hot and warm forming

Behrens, Bernd-Arno; Nürnberger, F.; Bonk, Christian; Hübner, S.; Behrens, S.; Vogt, H. (Bristol : Institute of Physics Publishing, 2017)

Aluminum alloys of the 7000 series possess high lightweight potential due to their high specific tensile strength combined with a good ultimate elongation. For this reason, hot-formed boron-manganese-steel parts can be ...
Investigations on laser beam welding of different dissimilar joints of steel and aluminum alloys for automotive lightweight construction

Seffer, Oliver; Pfeifer, Ronny; Springer, André; Kaierle, Stefan (Amsterdam : Elsevier B.V., 2016)

Due to the enormous potential of weight saving, and the consequential reduction of pollutant emissions, the use of hybrid components made of steel and aluminum alloys is increasing steadily, especially concerning automotive ...
ITO-free metallization for interdigitated back contact silicon heterojunction solar cells

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 ...
Kerfless exfoliated thin crystalline Si wafers with Al metallization layers for solar cells

Niepelt, Raphael; Hensen, Jan; Steckenreiter, Verena; Brendel, Rolf; Kajari-Schröder, Sarah (Cambridge : Cambridge University Press, 2015)

We report on a kerfless exfoliation approach to further reduce the costs of crystalline silicon photovoltaics making use of evaporated Al as a double functional layer. The Al serves as the stress inducing element to drive ...

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