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Influence of Silicon Substrate Surface Finish on the Screen-Printed Silver Metallization of Polysilicon-Based Passivating Contacts

Chaudhary, A. (author), Hoß, Jan (author), Lossen, Jan (author), Huster, Frank (author), Kopecek, Radovan (author), van Swaaij, R.A.C.M.M. (author), Zeman, M. (author)

Passivated contact based on a thin interfacial oxide and a highly doped polysilicon layer has emerged as the next evolutionary step to increase the efficiencies of industrial silicon solar cells. To take maximum advantage from this layer stack, it is vital to limit the losses at the metal polysilicon interface, which can be quantified as...

journal article 2022

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Effect of Climate on Photovoltaic Yield Prediction Using Machine Learning Models

Alcañiz Moya, A. (author), Lindfors, Anders V. (author), Zeman, M. (author), Ziar, H. (author), Isabella, O. (author)

Machine learning is arising as a major solution for the photovoltaic (PV) power prediction. Despite the abundant literature, the effect of climate on yield predictions using machine learning is unknown. This work aims to find climatic trends by predicting the power of 48 PV systems around the world, equally divided into four climates. An...

journal article 2022

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Controllable Simultaneous Bifacial Cu-Plating for High-Efficiency Crystalline Silicon Solar Cells

Han, C. (author), Yang, G. (author), Procel Moya, P.A. (author), O'Connor, D. (author), Zhao, Y. (author), Gopalakrishnan, Anirudh (author), Zhang, Xiaodan (author), Zeman, M. (author), Mazzarella, L. (author), Isabella, O. (author)

Bifacial (BF) copper-plated crystalline silicon solar cell is an attractive topic to concurrently reduce silver consumption and maintain good device performance. However, it is still challenging to realize a high aspect ratio (AR) of the metal fingers. Herein, a new type of hybrid-shaped Cu finger is electromagnetically fabricated in a BF...

journal article 2022

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Low-breakdown-voltage solar cells for shading-tolerant photovoltaic modules

Calcabrini, A. (author), Procel Moya, P.A. (author), Kambhampati, V. (author), Manganiello, P. (author), Muttillo, M. (author), Zeman, M. (author), Isabella, O. (author)

The integration of photovoltaic (PV) technology in urban environments poses new challenges for the design of PV modules. In particular, the poor shading tolerance of conventional PV modules strongly limits the energy performance of urban PV systems. In this work, we analyze how interdigitated back-contact solar cells with low-breakdown...

journal article 2022

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Transition to Digitalized Paradigms for Security Control and Decentralized Electricity Market

Bellizio, Federica (author), Xu, Wangkun (author), Qiu, Dawei (author), Ye, Yujian (author), Papadaskalopoulos, Dimitrios (author), Cremer, Jochen (author), Teng, Fei (author), Strbac, Goran (author)

Digitalization is one of the key drivers for energy system transformation. The advances in communication technologies and measurement devices render available a large amount of operational data and enable the centralization of such data storage and processing. The greater access to data opens up new opportunities for a more efficient and...

journal article 2022

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Concepts for heat utilization and passive cooling techniques to improve reliability and performance of Building Integrated Photovoltaics (BIPV)

Ortiz Lizcano, J.C. (author), Calcabrini, A. (author), Santbergen, R. (author), Procel Moya, P.A. (author), Zeman, M. (author), Isabella, O. (author)

When integrated into urban environments, photovoltaic (PV) systems usually present operational temperatures that are significantly higher than those shown by rack-mounted systems. High operating temperatures are associated with reduced reliability of PV modules and significantly impact the electrical performance of solar cells. Utilizing the...

journal article 2022

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Experimental study on solar heat battery using phase change materials for parabolic dish collectors

Senthil, Ramalingam (author), Priya, Inbaraj Infanta Mary (author), Gupta, Mukund (author), Rath, C. (author), Ghosh, Nilanshu (author)

Energy consumption has increased with the population increase, and fossil fuel dependency has risen and causing pollutions. Solar energy is suitable to provide society's thermo-electric needs. Thermal energy storage-based concentrated solar receivers are aimed at store heat energy and transportable to the applications. A cavity receiver with...

journal article 2021

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Room-temperature sputtered tungsten-doped indium oxide for improved current in silicon heterojunction solar cells

Han, C. (author), Zhao, Y. (author), Mazzarella, L. (author), Santbergen, R. (author), Bento Montes, A.R. (author), Procel Moya, P.A. (author), Yang, G. (author), Zhang, Xiaodan (author), Zeman, M. (author), Isabella, O. (author)

The window layers limit the performance of silicon heterojunction (SHJ) solar cells with front and back contacts. Here, we optimized tungsten-doped indium oxide (IWO) film deposited by radio frequency magnetron sputtering at room temperature. The opto-electrical properties of the IWO were manipulated when deposited on top of thin-film silicon...

journal article 2021

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Critical Components Identification for Cyber-Physical Power Systems Considering Time-Varying Operational States

Liu, Y. (author), Semertzis, I. (author), Stefanov, Alexandru (author), Palensky, P. (author)

The security issues of Cyber-Physical power Systems (CPS) have attracted widespread attention from scholars. Vulnerability assessment emerges as an effective method to identify the critical components and thus increase the system resilience. While efforts have been made to study the vulnerability features of power systems under the occurrence...

conference paper 2021

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Passivation Enhancement of Poly-Si Carrier-Selective Contacts by Applying ALD Al_2O_3 Capping Layers

Yang, G. (author), Van de Loo, Bas (author), Stodolny, Maciej (author), Limodio, G. (author), Melskens, Jimmy (author), Isabella, O. (author), Weeber, A.W. (author), Zeman, M. (author), Kessels, W. M.M. (author)

Hydrogenation of polycrystalline silicon (poly-Si) passivating contacts is crucial for maximizing their passivation performance. This work presents the application of Al2O3 prepared by atomic layer deposition as a hydrogenating capping layer. Several important questions related to this application of Al2O3 are addressed by comparing results...

journal article 2021

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A Comprehensive Workflow for High Resolution 3D Solar Photovoltaic Potential Mapping in Dense Urban Environment: A Case Study on Campus of Delft University of Technology

Zhou, Y. (author), Verkou, M.H. (author), Zeman, M. (author), Ziar, H. (author), Isabella, O. (author)

Photovoltaic (PV) technology is the most promising renewable energy source to be integrated on urban building surfaces. Modeling and simulating urban PV systems pose more challenges than the conventional ones installed in open field due to rich urban morphology. Herein, a comprehensive workflow to estimate urban solar PV potential is...

journal article 2021

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Colored optic filters on c-Si IBC solar cells for building integrated photovoltaic applications

Ortiz Lizcano, J.C. (author), Procel Moya, P.A. (author), Calcabrini, A. (author), Yang, G. (author), Ingenito, Andrea (author), Santbergen, R. (author), Zeman, M. (author), Isabella, O. (author)

Building Integrated Photovoltaic systems can produce a significant portion of the energy demand of urban areas. Despite their potential, they remain a niche technology that architects and project engineers still find esthetically limited. The dark blue or black color of standard photovoltaic panels is considered inappropriate for restoration...

journal article 2021

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A fully reconfigurable series-parallel photovoltaic module for higher energy yields in urban environments

Calcabrini, A. (author), Muttillo, M. (author), Weegink, Raoul (author), Manganiello, P. (author), Zeman, M. (author), Isabella, O. (author)

Photovoltaic modules in the urban environment are very often exposed to uneven illumination conditions. The electrical interconnection between solar cells in a photovoltaic module limits the power that a solar module can generate under partial shading conditions. In this article, we introduce a PV module that is able to dynamically reconfigure...

journal article 2021

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Design and optimization of hole collectors based on nc-SiO_x:H for high-efficiency silicon heterojunction solar cells

Zhao, Y. (author), Procel Moya, P.A. (author), Han, C. (author), Mazzarella, L. (author), Yang, G. (author), Weeber, A.W. (author), Zeman, M. (author), Isabella, O. (author)

Low activation energy (E_a) and wide bandgap (E_g) are essential for (p)-contacts to achieve effective hole collection in silicon heterojunction (SHJ) solar cells. In this work, we study Plasma-Enhanced Chemical Vapor Deposition p-type hydrogenated nanocrystalline silicon oxide, (p)nc-SiO_x:H, combined with (p)nc...

journal article 2021

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Advancement in screen printed fire through silver paste metallisation of polysilicon based passivating contacts

Chaudhary, A. (author), Hoß, Jan (author), Lossen, Jan (author), van Swaaij, R.A.C.M.M. (author), Zeman, M. (author)

We have metallised n+ polysilicon passivated layer structures deposited by Low Pressure Chemical Vapor Deposition (LPCVD) with silver pastes. We analysed recombination at the metal contacts by photoluminescence imaging of metallised lifetime samples and found for the best paste, metal semiconductor recombination current density values (J0met)...

conference paper 2021

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Ultra-thin electron collectors based on nc-Si:H for high-efficiency silicon heterojunction solar cells

Zhao, Y. (author), Mazzarella, L. (author), Procel Moya, P.A. (author), Han, C. (author), Tichelaar, F.D. (author), Yang, G. (author), Weeber, A.W. (author), Zeman, M. (author), Isabella, O. (author)

Low parasitic absorption and high conductivity enable (n)-type hydrogenated nanocrystalline silicon [(n)nc-Si:H], eventually alloyed with oxygen [(n)nc-SiO_x:H], to be deployed as window layer in high-efficiency silicon heterojunction (SHJ) solar cells. Besides the appropriate opto-electrical properties of these nanocrystalline...

journal article 2021

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A silicon carbide-based highly transparent passivating contact for crystalline silicon solar cells approaching efficiencies of 24%

Köhler, Malte (author), Pomaska, Manuel (author), Procel Moya, P.A. (author), Santbergen, R. (author), Lambertz, Andreas (author), Duan, Weiyuan (author), Eberst, Alexander (author), Luysberg, Martina (author), Isabella, O. (author)

A highly transparent passivating contact (TPC) as front contact for crystalline silicon (c-Si) solar cells could in principle combine high conductivity, excellent surface passivation and high optical transparency. However, the simultaneous optimization of these features remains challenging. Here, we present a TPC consisting of a silicon-oxide...

journal article 2021

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Simulation study of the electrical yield of various PV module topologies in partially shaded urban scenarios

Calcabrini, A. (author), Weegink, Raoul (author), Manganiello, P. (author), Zeman, M. (author), Isabella, O. (author)

Urban environments present a great potential to generate electricity with photovoltaic technology. However, this electricity cannot be fully harvested using conventional solar modules that have been designed for open landscapes. In urban environments, photovoltaic modules can often be subject to partial shading caused by trees and building...

journal article 2021

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Characterization of the defect density states in MoO_x for c-Si solar cell applications

Scire, D. (author), Macaluso, Robert (author), Mosca, Mauro (author), Mirabella, S. (author), Gulino, Antonino (author), Isabella, O. (author), Zeman, M. (author), Crupi, I. (author)

Thin layers of MoO_x have been deposited by thermal evaporation followed by post-deposition annealing. The density of states distributions of the MoO_x films were extracted deconvoluting the absorption spectra, measured by a photothermal deflection spectroscopy setup, including the small polaron contribution. Results...

journal article 2021

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Comparing optical performance of a wide range of perovskite/silicon tandem architectures under real-world conditions

Singh, M. (author), Santbergen, R. (author), Syifai, Indra (author), Zeman, M. (author), Isabella, O. (author)

Since single junction c-Si solar cells are reaching their practical efficiency limit. Perovskite/c-Si tandem solar cells hold the promise of achieving greater than 30% efficiencies. In this regard, optical simulations can deliver guidelines for reducing the parasitic absorption losses and increasing the photocurrent density of the tandem...

journal article 2021