Searched for: author%3A%22Eijt%2C+S.W.H.%22
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Visser, P.M. (author), Eijt, S.W.H. (author), de Nijs, J.V. (author)
Context. Modified Newtonian dynamics (MOND) is a promising alternative to dark matter. To further test the theory, there is a need for fluid- and particle-dynamics simulations. The force in MOND is not a direct particle-particle interaction, but derives from a potential for which a nonlinear partial differential equation (PDE) needs to be...
journal article 2024
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Zhang, F. (author), Wu, Z. (author), Wang, Jianlin (author), Wu, Zhenduo (author), Zhao, C. (author), Eijt, S.W.H. (author), Schut, H. (author), van Dijk, N.H. (author), Brück, E.H. (author)
Recently, the all-d-metal Ni(Co)MnTi based Heusler compounds are found to have a giant magnetocaloric effect (GMCE) near room temperature and manifest different functionalities like multicaloric effects, which can be employed for solid-state refrigeration. However, in comparison to other traditional Heusler compounds, the relatively large...
journal article 2024
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Wu, Z. (author), De Wit, Lidwin (author), Beek, Melanie (author), Colombi, G. (author), Chaykina, D. (author), Schreuders, H. (author), Schut, H. (author), Butterling, Maik (author), Brück, E.H. (author), Dam, B. (author), Eijt, S.W.H. (author)
Cycling stability of the photochromic effect in rare-earth oxyhydride thin films is of great importance for long-term applications such as smart windows. However, an increasingly slower bleaching rate upon photochromic cycling was found in yttrium oxyhydride thin films; the origin of this memory effect is yet unclear. In this work, the...
journal article 2024
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Banerjee, Shrestha (author), Chaykina, D. (author), Stigter, Marinus (author), Colombi, G. (author), Eijt, S.W.H. (author), Dam, B. (author), de Wijs, Gilles A. (author), Kentgens, Arno P.M. (author)
Rare earth oxyhydrides REO<sub>x</sub>H<sub>(3-2x)</sub>, with RE = Y, Sc, or Gd and a cationic FCC lattice, are reversibly photochromic in nature. It is known that structural details and anion (O<sup>2-</sup>:H<sup>-</sup>) composition dictate the efficiency of the photochromic behavior. The mechanism behind the photochromism is, however,...
journal article 2023
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Wu, Z. (author), De Krom, Tom (author), Colombi, G. (author), Chaykina, D. (author), Van Hattem, Gijs (author), Schut, H. (author), Dickmann, Marcel (author), Brück, E.H. (author), Dam, B. (author), Eijt, S.W.H. (author)
Rare-earth (RE) oxyhydride thin films show a color-neutral, reversible photochromic effect at ambient conditions. The origin of the photochromism is the topic of current investigations. Here, we investigated the lattice defects, electronic structure, and crystal structure of photochromic YHxOy and GdHxOy thin films deposited by magnetron...
journal article 2022
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Colombi, G. (author), Stigter, Marinus (author), Chaykina, D. (author), Banerjee, Shrestha (author), Kentgens, Arno P.M. (author), Eijt, S.W.H. (author), Dam, B. (author), De Wijs, Gilles A. (author)
In this paper, we investigate by ab initio DFT how the O:H ratio influences the formation and lattice energy, metastability, and optical properties of Y and La anion-disordered ROxH3-2x oxyhydrides. To achieve this, a set of special quasirandom structures (SQS) is introduced to model anion-disorder along the whole RH3-R2O3 composition line. A...
journal article 2022
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Chaykina, D. (author), Usman, I.N. (author), Colombi, G. (author), Schreuders, H. (author), Tyburska-Pueschel, Beata (author), Wu, Z. (author), Eijt, S.W.H. (author), Bannenberg, L.J. (author), De Wijs, Gilles A. (author), Dam, B. (author)
To develop an understanding of the photochromic effect in rare-earth metal oxyhydride thin films (REH3-2xOx, here RE = Y), we explore the aliovalent doping of the RE cation. We prepared Ca-doped yttrium oxyhydride thin films ((CazY1-z)HxOy) by reactive magnetron cosputtering with Ca doping concentrations between 0 and 36 at. %. All of the...
journal article 2022
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Nokelainen, Johannes (author), Barbiellini, Bernardo (author), Kuriplach, Jan (author), Eijt, S.W.H. (author), Ferragut, Rafael (author), Li, Xin (author), Kothalawala, Veenavee (author), Suzuki, Kosuke (author), Hafiz, Hasnain (author), Bansil, Arun (author)
Reduction-oxidation (redox) reactions that transfer conduction electrons from the anode to the cathode are the fundamental processes responsible for generating power in Li-ion batteries. Electronic and microstructural features of the cathode material are controlled by the nature of the redox orbitals and how they respond to Li intercalation....
review 2022
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Chaykina, D. (author), Usman, I.N. (author), Colombi, G. (author), Schreuders, H. (author), Tyburska-Pueschel, Beata (author), Wu, Z. (author), Eijt, S.W.H. (author), Bannenberg, L.J. (author), De Wijs, Gilles A. (author), Dam, B. (author)
The energy axes of the RBS and ERD data (contained in Figures 2a,b,d,e, and S4) were originally underestimated, and the corrected figures appear below and in the Supporting Information. The change is in the conversion from raw data to the energy scale, which was initially converted incorrectly. The rescaled x-axis does not change the data...
journal article 2022
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Colombi, G. (author), De Krom, Tom (author), Chaykina, D. (author), Cornelius, S. (author), Eijt, S.W.H. (author), Dam, B. (author)
Rare-earth oxyhydride REOxH3-2x thin films prepared by air-oxidation of reactively sputtered REH2 dihydrides show a color-neutral, reversible photochromic effect at ambient conditions. The present work shows that the O/H anion ratio, as well as the choice of the cation, allow to largely tune the extent of the optical change and its speed. The...
journal article 2021
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Chaykina, D. (author), De Krom, T. (author), Colombi, G. (author), Schreuders, H. (author), Suter, A. (author), Prokscha, T. (author), Dam, B. (author), Eijt, S.W.H. (author)
Thin films of rare-earth metal oxyhydrides, such as yttrium oxyhydrides (YH3-2xOx), show a photochromic effect where the transparency of the films decreases reversibly upon exposure to UV light. However, the exact mechanism behind this effect is unknown. In this paper, we describe the behavior of YH3-2xOx thin films, with different O2-:H-...
journal article 2021
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van Amelrooy, E.F. (author), Schut, H. (author), Egger, Werner (author), Dickmann, Marcel (author), Hugenschmidt, Christoph (author), Mallée, L. (author), Hanefeld, U. (author), McMillan, D.G.G. (author), Eijt, S.W.H. (author)
A new method is developed to produce mesoporous titania thin films at room temperature using the enzyme papain in a dip-coating procedure, providing low-cost titania films in a sustainable manner. Quartz crystal microbalance, positron annihilation Doppler broadening and lifetime spectroscopy, scanning electron microscopy, and X-ray...
journal article 2020
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Bento Montes, A.R. (author), Eijt, S.W.H. (author), Tian, Y. (author), Gram, R. (author), Schut, H. (author), Suemasu, T. (author), Usami, N. (author), Zeman, M. (author), Serra, J. (author), Isabella, O. (author)
Barium di-silicide (BaSi<sub>2</sub>) is a very promising absorber material for high-efficiency thin-film solar cells, due to its suitable bandgap, high light absorption coefficient, and long minority-carrier lifetime. In this study, we compare the nanostructure, layer composition, and point defects of BaSi<sub>2</sub> thin films deposited by...
journal article 2020
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Eijt, S.W.H. (author), De Krom, T. W.H. (author), Chaykina, D. (author), Schut, H. (author), Colombi, G. (author), Cornelius, S. (author), Egger, W. (author), Dickmann, M. (author), Dam, B. (author)
Doppler broadening positron annihilation spectroscopy depth profiles were collected on photochromic YO<sub>x</sub>H<sub>y</sub> thin films. In situ UV illumination of photochromic semiconductor YO<sub>x</sub>H<sub>y</sub> films leads to an increase in S-parameter and a large reduction in W-parameter, possibly caused by a change in the charge...
journal article 2020
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Han, C. (author), Yang, G. (author), Montes, Ana (author), Procel Moya, P.A. (author), Mazzarella, L. (author), Zhao, Y. (author), Eijt, S.W.H. (author), Schut, H. (author), Zhang, Xiaodan (author), Zeman, M. (author), Isabella, O. (author)
In high-efficiency silicon solar cells featuring carrier-selective passivating contacts based on ultrathin SiOx/poly-Si, the appropriate implementation of transparent conductive oxide (TCO) layers is of vital importance. Considerable deterioration in passivation quality occurs for thin poly-Si-based devices owing to the sputtering damage...
journal article 2020
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Shi, W. (author), Theelen, Mirjam (author), Illiberi, Andrea (author), van der Sar, S.J. (author), Butterling, M. (author), Schut, H. (author), Zeman, M. (author), Brück, E.H. (author), Eijt, S.W.H. (author)
Positron annihilation lifetime spectroscopy (PALS) and Doppler broadening positron annihilation spectroscopy (DB-PAS) depth profiling demonstrate pronounced growth of vacancy clusters at the grain boundaries of as-deposited Al-doped ZnO films deposited as transparent conductive oxide (TCO) on Cu(In,Ga)Se2 (CIGS) solar cells upon accelerated...
journal article 2018
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Plokker, M.P. (author), Eijt, S.W.H. (author), Naziris, F. (author), Schut, H. (author), Nafezarefi, F. (author), Schreuders, H. (author), Cornelius, S. (author), Dam, B. (author)
In order to investigate the mechanism of the photochromic effect in yttrium oxy-hydride (YO<sub>x</sub>H<sub>y</sub>) thin films, Doppler broadening positron annihilation spectroscopy (PAS) was applied to probe the electronic structure and the presence of vacancies in YO<sub>x</sub>H<sub>y</sub> and related materials as a function of...
journal article 2018
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Shi, W. (author), Callewaert, Vincent (author), Barbiellini, Bernardo (author), Saniz, Rolando (author), Butterling, M. (author), Egger, Werner (author), Dickmann, Marcel (author), Hugenschmidt, Christoph (author), Shakeri, Behtash (author), Brück, E.H. (author), Eijt, S.W.H. (author)
Previous studies have shown that positron-annihilation spectroscopy is a highly sensitive probe of the electronic structure and surface composition of ligand-capped semiconductor quantum dots (QDs) embedded in thin films. The nature of the associated positron state, however, whether the positron is confined inside the QDs or localized at...
journal article 2018
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Shi, W. (author), Theelen, Mirjam (author), Illiberi, Andrea (author), van der Sar, S.J. (author), Butterling, M. (author), Schut, H. (author), Zeman, M. (author), Brück, E.H. (author), Eijt, S.W.H. (author)
Positron annihilation lifetime spectroscopy (PALS) and Doppler broadening positron annihilation spectroscopy DB-PAS) depth profiling demonstrate pronounced growth of vacancy clusters at the grain boundaries of as-deposited Al-doped ZnO films deposited as transparent conductive oxide (TCO) on Cu(In, Ga)Se2 (CIGS) solar cells upon accelerated...
journal article 2018
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Melskens, J. (author), Eijt, S.W.H. (author), Schouten, M. (author), Vullers, A.S. (author), Mannheim, Awital (author), Schut, H. (author), Macco, Bart (author), Zeman, M. (author), Smets, A.H.M. (author)
The nanostructure of hydrogenated amorphous silicon (a-Si:H) is studied by means of doppler broadening positron annihilation spectroscopy (DB-PAS) and Fourier transform infrared (FTIR) spectroscopy. The evolution of open volume deficiencies is monitored during annealing, demonstrating that small vacancies and other small vacancy clusters that...
journal article 2017
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