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Isabella, O. (author), Kr?, J. (author), Zeman, M. (author)Substrates with a modulated surface texture were prepared by combining different interface morphologies. The spatial frequency surface representation method is used to evaluate the surface modulation. When combining morphologies with appropriate geometrical features, substrates exhibit an increased scattering level in a broad wavelength region....journal article 2010
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Lipovek, B. (author), Kr?, J. (author), Isabella, O. (author), Zeman, M. (author), Topi?, M. (author)Diffusive dielectric materials such as white paint have been demonstrated as effective back reflectors in the photovoltaic technology. In this work, a one-dimensional (1D) optical modeling approach for simulation of white paint films is developed and implemented in a 1D optical simulator for thin-film solar cells. The parameters of white paint,...journal article 2010
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Zeman, M. (author), Isabella, O. (author), Jäger, K. (author), Santbergen, R. (author), Solntsev, S. (author), Topic, M. (author), Krc, J. (author)Light management is important for improving the performance of thin-film solar cells. Advanced concepts of efficient light scattering and trapping inside the cell structures need to be investigated. An important tool for design and optimisation of the concepts present optical modelling and simulation. In the article a model of light scattering...journal article 2012
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Pahud, C. (author), Isabella, O. (author), Naqavi, A. (author), Haug, F.J. (author), Zeman, M. (author), Herzig, H.P. (author), Ballif, C. (author)We study n-i-p amorphous silicon solar cells with light-scattering nanoparticles in the back reflector. In one configuration, the particles are fully embedded in the zinc oxide buffer layer; In a second configuration, the particles are placed between the buffer layer and the flat back electrode. We use stencil lithography to produce the same...journal article 2013
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- Tan, H. (author), Psomadaki, E. (author), Isabella, O. (author), Fischer, M. (author), Babal, P. (author), Vasudevan, R.A. (author), Zeman, M. (author), Smets, A.H.M. (author) journal article 2013
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- Si, F.T. (author), Kim, D. (author), Santbergen, R. (author), Tan, H. (author), Van Swaaij, R.A.C.M.M. (author), Smets, A.H.M. (author), Isabella, O. (author), Zeman, M. (author) journal article 2014
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Ingenito, A. (author), Ortiz Lizcano, J.C. (author), Luxembourg, S.L. (author), Santbergen, R. (author), Weeber, A. (author), Isabella, O. (author), Zeman, M. (author)At present, research in c-Si solar cells is focused on increasing the efficiency while reducing the amount of used materials. Since silicon wafer and metal contribute up to 50% to the cost of a module, it is crucial to reduce the amount of these materials to fabricate cost-effective modules. In particular, for reducing the consumption of metal,...journal article 2014
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- Di Marco, G. (author), Galogero, G. (author), Di Carlo, A. (author), Lombardo, S. (author), Palmisano, L. (author), Isabella, O. (author) journal article 2015
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Yang, G. (author), Ingenito, A. (author), van Hameren, Nienke (author), Isabella, O. (author), Zeman, M. (author)Ion-implanted passivating contacts based on poly-crystalline silicon (polySi) are enabled by tunneling oxide, optimized, and used to fabricate interdigitated back contact (IBC) solar cells. Both n-type (phosphorous doped) and p-type (boron doped) passivating contacts are fabricated by ion-implantation of intrinsic polySi layers deposited via low...journal article 2016
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Onwudinanti, Chidozie (author), Vismara, R. (author), Isabella, O. (author), Grenet, Louis (author), Emieux, Fabrice (author), Zeman, M. (author)We have used 3-D optical modelling to investigate light management concepts based on periodic textures and material optimization for photovoltaic devices based on Cu(In,Ga)Se2 (CIGS) absorber material. At first, calibration of the software based on the characterization of a reference (1500-nm thick) CIGS device was carried out. The effects of 1...journal article 2016
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Isabella, O. (author), Vismara, R. (author), Ingenito, A. (author), Rezaei, N. (author), Zeman, M. (author)The optical analysis of optically-textured and electrically-flat ultra-thin crystalline silicon (c-Si) slabs is presented. These slabs were endowed with decoupled front titanium-dioxide (TiO2) / back silicon-dioxide (SiO2) dielectric textures and were studied as function of two types of back reflectors: standard silver (Ag) and dielectric...journal article 2016
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Si, F.T. (author), Isabella, O. (author), Zeman, M. (author)Multijunction solar cells promise higher power-conversion efficiency than the single-junction. With respect to two-terminal devices, an accurate measurement of the spectral response requires a delicate adjustment of the light- and voltage-biasing; otherwise it can result in artifacts in the data and thus misinterpretation of the cell properties....journal article 2016
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Yang, G. (author), Ingenito, A. (author), Isabella, O. (author), Zeman, M. (author)Ion-implanted poly-crystalline silicon (poly-Si), in combination with a tunnel oxide layer, is investigated as a carrier-selective passivating contact in c-Si solar cells based on an interdigitated back contact (IBC) architecture. The optimized poly-Si passivating contacts enable low interface recombination, resulting in implied VOC (iVOC) of...journal article 2016
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Si, F.T. (author), Isabella, O. (author), Zeman, M. (author)Mixed-phase hydrogenated silicon oxide (SiOx:H) is applied to thin-film hydrogenated amorphous silicon germanium (a-SiGe:H) solar cells serving as both p-doped and n-doped layers. The bandgap of p-SiOx:H is adjusted to achieve a highly-transparent window layer while also providing a strong electric field. Bandgap grading of n-SiOx:H is designed...journal article 2017
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van de Loo, B.W.H. (author), Ingenito, A. (author), Verheijen, M.P.A.M. (author), Isabella, O. (author), Zeman, M. (author), Kessels, W. M.M. (author)Black silicon (b-Si) nanotextures can significantly enhance the light absorption of crystalline silicon solar cells. Nevertheless, for a successful application of b-Si textures in industrially relevant solar cell architectures, it is imperative that charge-carrier recombination at particularly highly n-type doped black Si surfaces is further...journal article 2017
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Vismara, R. (author), Isabella, O. (author), Zeman, M. (author)We present the optical investigation of a novel back-contacted architecture for solar cells based on a thin barium (di)silicide (BaSi<sub>2</sub>) absorber. First, through the analysis of absorption limits of different semiconducting materials, we show the potential of BaSi<sub>2</sub> for photovoltaic applications. Then, the proposed back...journal article 2017
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Si, F.T. (author), Isabella, O. (author), Zeman, M. (author), Tan, H. (author)We fabricated and studied quadruple-junction wide-gap a-Si:H/narrow-gap a-Si:H/a-SiGex:H/nc-Si:H thin-film silicon solar cells. It is among the first attempts in thin-film photovoltaics to make a two-terminal solar cell with four different absorber materials. Several tunnel recombination junctions were tested, and the n-SiOx:H/p-SiOx:H structure...journal article 2017
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Yang, G. (author), Zhang, Y. (author), Procel Moya, P.A. (author), Weeber, A.W. (author), Isabella, O. (author), Zeman, M. (author)Highest conversion efficiency in crystalline silicon (c-Si) solar cells can be enabled by quenching minority carriers' recombination at c-Si/contact interface owing to carrier-selective passivating contacts. With the semi-insulating poly-crystalline silicon (SIPOS, poly-Si) a very good passivation of c-Si surfaces was obtained. We have...journal article 2017
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Si, F.T. (author), Isabella, O. (author), Zeman, M. (author)The benefit of two-terminal multijunction solar cells in regard to the number<br/>of junctions (subcells) is critically evaluated. The optical and electrical losses<br/>inherent in the construction of multijunction cells are analyzed using information<br/>from thin-film silicon photovoltaics as a representative case. Although<br/>the...journal article 2017
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Stodolny, Maciej K. (author), Anker, John (author), Geerligs, Bart L.J. (author), Janssen, G.J.M. (author), Van De Loo, Bas W.H. (author), Melskens, J. (author), Santbergen, R. (author), Isabella, O. (author), Schmitz, Jurriaan (author), Lenes, Martijn (author), Luchies, Jan Marc (author), Kessels, Wilhelmus M.M. (author), Romijn, I.G. (author)We present a detailed material study of n<sup>+</sup>-type polysilicon (polySi) and its application as a carrier selective rear contact in a bifacial n-type solar cell comprising fire-through screen-printed metallization and 6" Cz wafers. The cells were manufactured with low-cost industrial process steps yielding V<sub>oc</sub>s from 676 to...journal article 2017