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Tulus, (author), Muscarella, L.A. (author), Galagan, Y. (author), Boehme, S.C. (author), von Hauff, E. (author)In this study, we quantify the impact of C60-passivation layers in Cs0.15FA0.85PbI2.75Br0.25 double-cation perovskite solar cells. We apply a combination of impedance spectroscopy, photoluminescence (PL) spectroscopy, and X-ray diffraction (XRD) to identify the origin for the increase in power conversion efficiencies and operational stability...article 2022
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Derkink, F.M. (author), Doelman, D. (author), van Dam, D. (author), Brenny, B.J.M. (author), Speet, B.G. (author), van Brug, H. (author), Keller, C. (author), Snik, F. (author)While the concentrations of trace gases in Earth’s atmosphere were roughly constant for thousands of years, human activities such as the burning of fossil fuels have caused significant changes ever since the industrial revolution. The remote sensing of trace gases has proved to be a useful technique for mapping and monitoring on the global scale...conference paper 2022
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Hernández-Balaguera, E. (author), Munoz-Díaz, L. (author), Pereyra, C. (author), Lira-Cantu, M. (author), Najafi, M. (author), Galagan, Y. (author)The unprecedented increase of photovoltaic perovskites performance metrics has been obscured by the puzzling phenomenology underlying the device's anomalous ionic/electronic landscape. Thus, the establishment of a reliable measurement protocol of efficiency measurements, unanimously adopted by the perovskite's community, is indeed necessary to...article 2022
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Hernández-Balaguera, E. (author), Romero, B. (author), Najafi, M. (author), Galagan, Y. (author)Interface engineering has become one of the most important research strategies to harness the full potential of perovskite solar cells. Photovoltaic community seems to herald the imminent development of 30% efficient perovskite devices with competitive lifetimes, subject, among other aspects, to clarify “what happens under the interfaces.” One...article 2022
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Houben, J. (author), Langelaan, D. (author), Brinkman, L. (author), Huinink, H. (author), Fischer, H.R. (author), Adan, O.C.G. (author)In this work, the relation between mobility and metastability is investigated. This is done under pure water vapor vacuum conditions. First, the properties of the metastable zone under pure water vapor conditions are investigated and compared to those under atmospheric conditions. Second, mobility is investigated using electrochemical impedance...article 2022
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Heedt, S. (author), Kouwenhoven, L.P. (author)We systematically study three-terminal InSb-Al nanowire devices by using radio-frequency reflectometry. Tunneling spectroscopy measurements on both ends of the hybrid nanowires are performed while systematically varying the chemical potential, magnetic field, and junction transparencies. Identifying the lowest-energy state allows for the...article 2022
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Merkx, M.J.M. (author), Jongen, R.G.J. (author), Mameli, A. (author), Lemaire, P.C. (author), Sharma, K. (author), Hausmann, D.M. (author), Kessels, W.M.M. (author), Mackus, A.J.M. (author)As the semiconductor industry progresses toward more complex multilayered devices with ever smaller features, accurately aligning these layers with respect to each other has become a bottleneck in the advancement to smaller transistor nodes. To avoid alignment issues, area-selective atomic layer deposition (ALD) can be employed to deposit...article 2021
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Rossi, E. (author), Zhang, H. (author), Garcia, S.J. (author), Bijleveld, J. (author), Nijland, T.G. (author), Copuroglu, O. (author), Polder, R.B. (author), Savija, B. (author)The elastic modulus of corrosion product (Ecp) has been reported with significant variations in the literature. This study aims to investigate the Ecp of naturally-generated chloride-induced corrosion products formed in different concrete mixes. Microstructural characterization was conducted through nano-indentation, electron microscopy and...article 2021
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Paardekooper, D.M. (author), Holbrook, C. (author), L.L.A. Vosteen, , (author), Meuken, B. (author), Halswijk, W.H.C. (author), Schleijpen, H.M.A. (author)This paper will report the use of spectroscopy in a series of experiments in which a High Energy Laser (HEL) interacts with target materials. After a brief description of the 30 kW L3O laser facility at TNO, the experimental results will be discussed. The main research question is whether spectroscopy can contribute to analysing the behaviour of...conference paper 2021
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Mione, M.A. (author), Vandalon, V. (author), Mameli, A. (author), Kessels, W.M.M. (author), Roozeboom, F. (author)An atmospheric-pressure plasma-enhanced spatial atomic layer deposition (PE-s-ALD) process for SiO2 using bisdiethylaminosilane (BDEAS, SiH2[NEt2]2) and O2 plasma is reported along with an investigation of its underlying growth mechanism. Within the temperature range of 100−250 °C, the process demonstrates self-limiting growth with a growth per...article 2021
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Moehle, C.M. (author), Ke, C.T. (author), Wang, Q. (author), Thomas, C. (author), Xiao, D. (author), Karwal, S. (author), Lodari, M. (author), van de Kerkhof, V. (author), Termaat, R. (author), Gardner, G.C. (author), Scappucci, G. (author), Manfra, M.J. (author), Goswami, S. (author)Topological superconductivity can be engineered in semiconductors with strong spin-orbit interaction coupled to a superconductor. Experimental advances in this field have often been triggered by the development of new hybrid material systems. Among these, two-dimensional electron gases (2DEGs) are of particular interest due to their inherent...article 2021
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López-González, M.C. (author), Del Pozo, G. (author), Martín-Martín, D. (author), Muñoz-Díaz, L. (author), Pérez-Martínez, J.C. (author), Hernández-Balaguera, E. (author), Arredondo, B. (author), Galagan, Y. (author), Najafi, M. (author), Romero B., (author)Perovskite solar cells (PSCs) have become very popular due to the high efficiencies achieved. Nevertheless, one of the main challenges for their commercialization is to solve their instability issues. A thorough understanding of the processes taking place in the device is key for the development of this technology. Herein, J-V measurements have...article 2021
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Hernández-Balaguera, E. (author), Romero, B. (author), Arredondo, B. (author), del Pozo, G. (author), Najafi, M. (author), Galagan, Y. (author)The potential opportunities of perovskite-based technology to further advance in the photovoltaic field and implement an extensive industrial application, will mainly depend on whether some of its weaknesses, such as current density-voltage (J−V) hysteresis, can be overcome. In this sense, a critical aspect is the understanding and the...article 2020
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16.8 Monolithic all-perovskite triple-junction solar cells via a universal two-step solution processWang, J. (author), Zardetto, V. (author), Datta, K. (author), Zhang, D. (author), Wienk, M.M. (author), Janssen, R.A.J. (author)Perovskite semiconductors hold a unique promise in developing multijunction solar cells with high-efficiency and low-cost. Besides design constraints to reduce optical and electrical losses, integrating several very different perovskite absorber layers in a multijunction cell imposes a great processing challenge. Here, we report a versatile two...article 2020
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Zhu, Y. (author), Rougieux, F. (author), Grant, N.E. (author), Du Guzman, J.A.T. (author), Murphy, J.D. (author), Markevich, V.P. (author), Coletti, G. (author), Peaker, A.R. (author), Hameiri, Z. (author)—Float-zone (FZ) silicon is usually assumed to be bulk defect-lean and stable. However, recent studies have revealed that detrimental defects can be thermally activated in FZ silicon wafers and lead to a reduction of carrier lifetime by up to two orders of magnitude. A robust methodology which combines different characterization techniques and...article 2020
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Nunez, J. (author), Wang, Y. (author), Bäumer, S.M.B. (author), Boersma, A. (author)The health and environmental effects of particulate matter (PM) in the air depend on several parameters. Besides particle size, shape, and concentration, the chemical nature of the PM is also of great importance. State-of-the-art PM sensors only detect the particle size and concentration. Small, low-cost sensors only identify PM according to PM2...article 2020
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Martynow, M. (author), Glowienka, D. (author), Szmytkowski, J. (author), Galagan, Y. (author), Guthmuller, J. (author)An experimental and theoretical investigation is reported to analyze the relation between the structural and absorption properties of CH3NH3PbI3 in the tetragonal phase. More than 3000 geometry optimizations were performed to reveal the structural disorder and identify structures with the lowest energies. The electronic structure calculations...article 2019
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- Mameli, A. (author), Verheijen, M.A. (author), Mackus, A.J.M. (author), Kessels, W.M.M. (author), Roozeboom, F. (author) public lecture 2019
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Anoop, K.M. (author), Khenkin, M.V. (author), Di Giacomo, F. (author), Galagan, Y. (author), Rahmany, S. (author), Etgar, L. (author), Katz, E.A. (author), Visoly-Fisher, I. (author)Degradation rates in perovskite solar cells (PSCs) were previously shown to be bias dependent; however, little is known about the mechanisms and driving factors that account for such degradation. Herein, stability studies under concentrated sunlight are demonstrated as a powerful experimental methodology to investigate bias-dependent PSC...article 2019
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Stoevelaar, L.P. (author), Cernigoj, J. (author), Berzinš, J. (author), Silvestri, F. (author), Gerini, G. (author)In this paper, an all-dielectric metasurface for surface enhanced Raman spectroscopy (SERS) is presented. The proposed design constitutes of an array of silicon (Si) dimers on top of thin film of silicon nitride (SiN), deposited on a glass substrate. The coupling mechanism between the dimers is based on two orthogonal guided waves in the SiN...conference paper 2019