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Auflistung nach Schlagwort "Solar cells"

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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 ...
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 ...
Assessing the Device-performance Impacts of Structural Defects with TCAD Modeling

Needleman, David Berney; Wagner, Hannes; Altermatt, Pietro P.; Buonassisi, Tonio (Amsterdam : Elsevier, 2015)

Advanced solar cell architectures like passivated emitter and rear (PERC) and heterojunction with intrinsic thin layer (HIT) are increasingly sensitive to bulk recombination. Present device models consider homogeneous bulk ...
Atmospheric components and dopant carry-over influence during laser ablation

Schütz, Viktor; Haupt, Oliver; Stute, Uwe (London : Elsevier Ltd., 2011)

In order to improve the efficiency of multi-crystalline (mc)-silicon solar cells, laser ablation as a non-contact tool is highly suitable for various processes. Apart from the laser and scanning parameters frequently ...
Calibrating spectrometers for measurements of the spectral irradiance caused by solar radiation

Schinke, Carsten; Pollex, Hendrik; Hinken, David; Wolf, Martin; Bothe, Karsten; Kröger, Ingo; Nevas, Saulius; Winter, Stefan (Sèvres : Bureau International des Poids et Mesures, 2020)

Measuring the spectral irradiance of solar radiation is required in many fields of science and technology. In this work, we present an in-depth discussion of the measuring procedure and required corrections for such ...
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) ...
Contactless quasi-steady-state photoconductance (QSSPC) characterization of metal halide perovskite thin films

Grimm, Benjamin; Wolter, Sascha J.; Schmidt, Jan ([London] : Macmillan Publishers Limited, part of Springer Nature, 2023)

We apply the contactless quasi-steady-state photoconductance (QSSPC) method to co-evaporated methyl ammonium lead iodide (MAPbI3) perovskite thin-films. Using an adapted calibration for ultralow photoconductances, we extract ...
Demonstrating the high Voc potential of PEDOT:PSS/c-Si heterojunctions on solar cells

Gogolin, Ralf; Zielke, D.; Descoeudres, A.; Despeisse, M.; Ballif, C.; Schmidt, J. (London : Elsevier Ltd., 2017)

In this study, we demonstrate the high surface passivation quality of PEDOT:PSS/c-Si junctions for the first time on solar cell level, reaching a record high Voc value of 688 mV after full-area metallization of the PEDOT:PSS. ...
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 ...
Elektronische und strukturelle Eigenschaften von Plasma-Siliziumnitrid zur Oberflächenpassivierung von siebgedruckten, bifazialen Silizium-Solarzellen

Lenkeit, Beate (Hannover : Universität, 2002)

[no abstract]
Experimental setup for camera-based measurements of electrically and optically stimulated luminescence of silicon solar cells and wafers

Hinken, David; Schinke, Carsten; Herlufsen, Sandra; Schmidt, Arne; Bothe, Karsten; Brendel, Rolf (College Park, MD : American Institute of Physics, 2011)

We report in detail on the luminescence imaging setup developed within the last years in our laboratory. In this setup, the luminescence emission of silicon solar cells or silicon wafers is analyzed quantitatively. Charge ...
Hierarchical Etching for Improved Optical Front-side Properties of Monocrystalline Si Solar Cells

Heinemeyer, Frank; Steckenreiter, Verena; Kiefer, Fabian; Peibst, Robby (London : Elsevier Ltd., 2015)

We investigate a hierarchical surface structuring process to reduce the optical reflectance of monocrystalline Si solar cells to below the reflectance of state-of-the-art alkaline texturing. First, alkaline texturing is ...
Identifying the location of recombination from voltage-dependent quantum efficiency measurements

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 ...
Impact of Ag Pads on the Series Resistance of PERC Solar Cells

Schulte-Huxel, Henning; Witteck, Robert; van Laak, Paula; Brendemühl, Till; Hinken, David; Bothe, Karsten; Brendel, Rolf (London : Elsevier Ltd., 2016)

Screen-printed passivated emitter and rear cells (PERC) require Ag pads on the rear side to enable solderable connections for module integration. These Ag pads are separated from the silicon by a dielectric layer to avoid ...
Impact of contacting geometries on measured fill factors

Kruse, Christian N.; Wolf, Martin; Schinke, Carsten; Hinken, David; Brendel, Rolf; Bothe, Karsten (London : Elsevier Ltd., 2017)

The fill factor determined from a measured current-voltage characteristic of a bare solar cell depends on the number and positions of the electrical contacting probes. Nine different geometries for contacting the front ...
Implementation of full-area-deposited electron-selective TiOx layers into silicon solar cells

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 ...
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 ...
Lifetime degradation and regeneration in multicrystalline silicon under illumination at elevated temperature

Bredemeier, Dennis; Walter, Dominic; Herlufsen, Sandra; Schmidt, Jan (Melville, NY : American Institute of Physics, 2016)

We examine the carrier lifetime evolution of block-cast multicrystalline silicon (mc-Si) wafers under illumination (100 mW/cm2) at elevated temperature (75◦C). Samples are treated with different process steps typically ...
Limits of ZnO electrodeposition in mesoporous tin doped indium oxide films in view of application in dye-sensitized solar cells

Dunkel, Christian; Graberg, Till von; Smarsly, Bernd M.; Oekermann, Torsten; Wark, Michael (Basel : MDPI AG, 2014)

Well-ordered 3D mesoporous indium tin oxide (ITO) films obtained by a templated sol-gel route are discussed as conductive porous current collectors. This paper explores the use of such films modified by electrochemical ...

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