cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Atom-photon, two-mode entanglement and two-mode squeezing in the presence of cross-Kerr nonlinearity
Creators: name: Mortezapour, Ali
name: Mahmoudi, Mohammad
name: Khajehpour, M R H
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The interaction of two quantized fields and three-level quantum system in a lambda-type configuration is investigated in the presence of cross-Kerr nonlinearity. We consider three models of coupling for the atom-photon interaction. First, we study the dynamical behavior of the atom-photon entanglement and show that increasing the cross-Kerr nonlinearity results in different behaviors in three considered models. Moreover, it is demonstrated that the two quantized modes can be entangled, on the other hand, by applying a classical driving field to the lower levels. Increasing the classical driving field destroys the long time atom-photon entanglement. Our results show that an oscillatory two-mode squeezing can be generated in the absence of a driving classical field and the cross-Kerr nonlinearity.
Superconductivity in metastable phases of phosphorus-hydride compounds under high pressure
Creators: name: Flores-Livas, José A.
name: Amsler, Maximilian
name: Heil, Christoph
name: Sanna, Antonio
name: Boeri, Lilia
name: Profeta, Gianni
name: Wolverton, Chris
name: Goedecker, Stefan
name: Gross, E. K. U.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Hydrogen-rich compounds have been extensively studied both theoretically and experimentally in the quest for novel high-temperature superconductors. Reports on sulfur-hydride attaining metallicity under pressure and exhibiting superconductivity at temperatures as high as 200 K have spurred an intense search for room-temperature superconductors in hydride materials. Recently, compressed phosphine was reported to metallize at pressures above 45 GPa, reaching a superconducting transition temperature (T$_{c}$) of 100 K at 200 GPa. However, neither the exact composition nor the crystal structure of the superconducting phase have been conclusively determined. In this work the phase diagram of PH$_n$ ($n=1,2,3,4,5,6$) was extensively explored by means of {\it ab initio} crystal structure predictions using the Minima Hopping Method (MHM). The results do not support the existence of thermodynamically stable PH$_n$ compounds, which exhibit a tendency for elemental decomposition at high pressure even when vibrational contributions to the free energies are taken into account. Although the lowest energy phases of PH$_{1,2,3}$ display T$_{c}$'s comparable to experiments, it remains uncertain if the measured values of T$_{c}$ can be fully attributed to a phase-pure compound of PH$_n$.
On the Road towards Vehicle Integration: Glass-Fibre Reinforced Encapsulation Enabling Light-Weight and Curved Modules
Creators: name: Govaerts, J.
name: Borgers, T.
name: Van Der Heide, A.S.H.
name: Vastmans, L.
name: Moors, R.
name: Doumen, G.
name: Tous, L.
name: Bettinelli, A.
name: Harrison, S.
name: Willems, B.
name: Galbiati, G.
name: Galiazzo, M.
name: Cerasti, L.
name: Poortmans, J.
Publisher: name: WIP
Year: 2020
Subjects: New Materials and Concepts for Photovoltaic Devices
New Materials and Concepts for Cells and Modules

description: 37th European Photovoltaic Solar Energy Conference and Exhibition; 98-102
description: In this work we propose an approach for integrating c-Si PV into lightweight structures targeting applications away from more standard PV installations as BAPV and ground-mounted PV power plants. Allowing also to adapt to curved surfaces, this approach would be very suitable for vehicle integration. The technology is based on reinforcing the encapsulant with glass fibres, and in first instance is being developed with commercially available material. After motivating the work in an introduction, some considerations are outlined in terms of performance, cost, weight, curvature, aesthetics and reliability. These will need to be translated into requirements in the future. Then we elaborate on the initial tests that have been carried out. Using either standard tabbing-stringing and shingled interconnection, stacks with different material combinations were prepared and laminated. After testing the IV-performance, the laminates have been submitted to thermal cycling and are being monitored. The initial results that are available are reported.
Leutnant Johannes Martin Suter, 1918-1943
Creators: name: (:Unkn) Unknown
Publisher: name: Zentralbibliothek Zürich
Year: 1943
Subjects: subject: 355 Militärwissenschaft
subject: 920 Biografien, Genealogie, Insignien
subject: Nachruf
subject: Suter, Johannes Martin

description: Enthält: Telegramm an die Familie, im Auftrag des Bataillonskommandanten, der Adjutant: Oberleutnant Fischli; Die Abdankungsfeier und militärische Bestattung am 5. November 1943: Lebenslauf; Predigt, von Pfarrer Zellweger; Ansprache von Major Mangold, Bat.-Kdt. am Grabe; Abschiedsworte von Hauptmann Rychen, Kommandant der Mitrailleurkompagnie IV/52. Dem Andenken Martins: Beiträge von: Ernst Fischli, Paul Schmidt. Martin Suter als Kamerad und Chemiker von Dr. Emil Girod. Letzte Aufzeichnungen von Martin.
Report of annual workshop 4
Creators: name: Bodera Sempere, Jordi
name: Gotz, Andrew
Publisher: name: Zenodo
Year: 2023
Subjects: EOSC
PaNOSC
deliverable

description: This document is the deliverable D1.10 of PaNOSC and summarises the PaNOSC closing event hosted by ESRF that took place on 29th and 30th November 2022. The final event was hybrid in order to facilitate remote or in-person attendance.
 This report also covers the recent progress achieved from all work packages.
Effect of Hydrogen Plasma Treatment on Silicon Quantum Dot Multilayers Using Amorphous SiOx
Creators: name: Akaishi, R.
name: Gotoh, K.
name: Kato, S.
name: Usami, N.
name: Kurokawa, Y.
Publisher: name: WIP
Year: 2020
Subjects: New Materials and Concepts for Photovoltaic Devices
New Materials and Concepts for Cells and Modules

description: 37th European Photovoltaic Solar Energy Conference and Exhibition; 83-86
description: The bandgap of silicon quantum dots (Si-QDs) is tunable in a wide range depending on its size, due to the quantum size effect. Si-QD multilayers (Si-QDMLs) are a promising material for a light-absorber of all silicon tandem solar cell, which is possible to overcome the Shockley-Queisser limit. To improve the quality of Si-QDMLs, hydrogen termination to dangling bonds is very important. In this study, we investigated the effects of hydrogen plasma treatment (HPT) on Si-QDMLs. 30-period Si-QDMLs were prepared by plasma-enhanced chemical vapor deposition (PECVD) and an annealing process onto quartz substrates. Raman scattering spectra showed that the hydrogen was introduced into the Si-QDMLs by the HPT. From ESR measurement, the defect density in the Si-QDML was reduced from 1.1×1019 to 8.1×1017 cm-3 by HPT at 600 oC. Conductivity was increased from 3.3×10-8 to 2.9×10-6 S/cm, suggesting that the hydrogen termination to charged defects or the suppression of carrier scattering due to defects. These results clearly showed the HPT is beneficial for reducing defects in the Si-QDMLs and it is possible to improve the film quality of Si-QDMLs.
Discriminating Topology in Galaxy Distributions using Network Analysis
Creators: name: Hong, Sungryong
name: Coutinho, Bruno
name: Dey, Arjun
name: Barabási, Albert -L.
name: Vogelsberger, Mark
name: Hernquist, Lars
name: Gebhardt, Karl
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: (abridged) The large-scale distribution of galaxies is generally analyzed using the two-point correlation function. However, this statistic does not capture the topology of the distribution, and it is necessary to resort to higher order correlations to break degeneracies. We demonstrate that an alternate approach using network analysis can discriminate between topologically different distributions that have similar two-point correlations. We investigate two galaxy point distributions, one produced by a cosmological simulation and the other by a Lévy walk. For the cosmological simulation, we adopt the redshift $z = 0.58$ slice from Illustris (Vogelsberger et al. 2014A) and select galaxies with stellar masses greater than $10^8$$M_\odot$. The two point correlation function of these simulated galaxies follows a single power-law, $ξ(r) \sim r^{-1.5}$. Then, we generate Lévy walks matching the correlation function and abundance with the simulated galaxies. We find that, while the two simulated galaxy point distributions have the same abundance and two point correlation function, their spatial distributions are very different; most prominently, \emph{filamentary structures}, absent in Lévy fractals. To quantify these missing topologies, we adopt network analysis tools and measure diameter, giant component, and transitivity from networks built by a conventional friends-of-friends recipe with various linking lengths. Unlike the abundance and two point correlation function, these network quantities reveal a clear separation between the two simulated distributions; therefore, the galaxy distribution simulated by Illustris is not a Lévy fractal quantitatively. We find that the described network quantities offer an efficient tool for discriminating topologies and for comparing observed and theoretical distributions.
description: 11 pages, 5 figures, submitted to MNRAS on 12/15/2015, now fully reviewed for publication; more information about our network analyses can be found at https://sites.google.com/site/shongscience/research
维多利亚的华人商铺名单
Creators: name: Chinese Consolidated Benevolent Association (Victoria, B.C.)
Publisher: name: University of Victoria Libraries
Year: 2020
Subjects: subject: Chinese
valueUri: http://id.worldcat.org/fast/857169
subject: History
valueUri: http://id.worldcat.org/fast/1411628
subject: Immigrants--Economic conditions
valueUri: http://id.worldcat.org/fast/967725
subject: Taxation
valueUri: http://id.worldcat.org/fast/1143876
subject: Poll tax
valueUri: http://id.worldcat.org/fast/1069997

description: A list of the names of Chinese businessmen in Victoria.
Jump operations for Borel graphs
Creators: name: Day, Adam R.
name: Marks, Andrew S.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Logic (math.LO)
subject: FOS: Mathematics

description: We investigate the class of bipartite Borel graphs organized by the order of Borel homomorphism. We show that this class is unbounded by finding a jump operator for Borel graphs analogous to a jump operator of Louveau for Borel equivalence relations. The proof relies on a non-separation result for iterated Frechet ideals and filters due to Debs and Saint Raymond. We give a new proof of this fact using effective descriptive set theory. We also investigate an analogue of the Friedman-Stanley jump for Borel graphs. This analogue does not yield a jump operator for bipartite Borel graphs. However, we use it to answer a question of Kechris and Marks by showing that there is a Borel graph with no Borel homomorphism to a locally countable Borel graph, but each of whose connected components has a countable Borel coloring.
Analysis of Selenization Processes for Antimony Selenide Solar Cells by Vacuum Evaporation
Creators: name: Kumar, V.
name: Artegiani, E.
name: Punathil, P.
name: Romeo, A.
Publisher: name: WIP
Year: 2020
Subjects: New Materials and Concepts for Photovoltaic Devices
New Materials and Concepts for Cells and Modules

description: 37th European Photovoltaic Solar Energy Conference and Exhibition; 87-90
description: In the presented work, Antimony selenide (Sb2Se3) based thin films have been grown in superstrate configuration by low temperature thermal evaporation process. For re-incorporation of Se to adjust the stoichiometry and increase crystallization of the absorber has been done in this paper. Solar cells were fabricated in the superstrate configuration of Glass/ITO/ZnO/CdS/Sb2Se3/Cu/Au. Post deposition selenization of the as deposited samples at 300 and 400 °C in argon environment were carried out. Material characterization and the electrical characterization reveal the preferred orientation [hk1] of the Sb2Se3 when deposited via thermal evaporation ,a better device performance is observed with Bromine ethanol etching. Post deposition Selenization of the deposited sample under Argon environment shows that the champion solar cell showed a conversion efficiency of 1.2 % with a Voc of 402 mV and FF of 24.3% which is less than the as deposited sample.
Welche "Themen" und "Stoffe" sollen außer der Heiligen Schrift in der Katechese verwendet werden?
Creators: name: Nipkow, Karl Ernst
Publisher: name: Concilium
Year: 1970

description: Concilium, Bd. 6 Nr. 3 (1970): Concilium: Internationale Zeitschrift für Theologie, Band 6, Heft 3
Existence of Solution to a Local Fractional Nonlinear Differential Equation
Creators: name: Bayour, Benaoumeur
name: Torres, Delfim F. M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 26A33, 34A12

description: We prove existence of solution to a local fractional nonlinear differential equation with initial condition. For that we introduce the notion of tube solution.
description: This is a preprint of a paper whose final and definite form will be published in Journal of Computational and Applied Mathematics, ISSN: 0377-0427. Paper Submitted 04/Jul/2015; Revised 14/Dec/2015 and 03/Jan/2016; Accepted for publication 08/Jan/2016
On the need for unbiasing azimuthal asymmetry in signals measured by surface detector arrays
Creators: name: Luce, Quentin
name: Roth, Markus
name: Schmidt, David
name: Veberič, Darko
Publisher: name: Scuola Internazionale Superiore di Studi Avanzati (SISSA)
Year: 2022

description: A surface detector array samples the lateral distribution of an extensive air-shower (EAS) at the ground, i.e. the density of particles as a function of the distance from the axis of the shower. The azimuthal symmetry of this measured lateral distribution is broken for EAS with a non-zero zenith angle. The resulting asymmetry, caused by atmospheric attenuation and geometrical effects, increases with the inclination of the shower and introduces a bias in the reconstruction of the shower parameters. Using simulated sets of air-showers, we present a model to correct the azimuthal asymmetry in signals measured by water-Cherenkov detectors and exemplified using the geometry and detector response of the Pierre Auger Observatory. Testing showers initiated by proton and iron primaries using EPOS-LHC and QGSJetII-04 as hadronic models, we developed a fine-tuned model of the amplitude of the asymmetry as a function of the zenith angle, shower size and distance of a detector from the shower axis. The improvements resulting from the application of the correction are quantified in terms of the biases and resolutions in the impact-point and arrival direction.
PV Crystalline Cell Production Including High Efficiency PERC
Creators: name: Beisenherz, D.
Publisher: name: WIP - Renewable Energies and ETA-Florence Renewable Energies
Year: 2014
Subjects: subject: c-Si; crystalline; multi-crystalline; multicrystalline silicon; PECVD; silicon-nitride; PERC
subject: 1. PV Technologies, Cells, Modules, Systems

description: -
description: 1st Africa Photovoltaic Solar Energy Conference and Exhibition Proceedings, AfricaPVSEC 2014
Analysis of the Interface of RF-Sputtered MoOx based Hole-Selective Contacts for Silicon Heterojunction Solar Cells
Creators: name: Elsmani, M.I.
name: Cho, J.
name: Recaman Payo, M.
name: Gordon, I.
name: Tresso, E.
name: Fatima, N.
name: Adib Ibrahim, M.
name: Sopian, K.
name: Poortmans, J.
Publisher: name: WIP
Year: 2020
Subjects: New Materials and Concepts for Photovoltaic Devices
Fundamental Studies

description: 37th European Photovoltaic Solar Energy Conference and Exhibition; 74-78
description: A thin film of molybdenum oxide (MoOx) has been demonstrated to be a promising passivating contact for silicon heterojunction (SHJ) solar cells, because MoOx has a high work function and a high bandgap which offers favorable conditions for hole collection by inducing upward band bending and making the contacts in SHJ cells more transparent. Despite the large throughput potential of sputtering processes, sputtered MoOx yields inferior results in comparison to thermally evaporated MoOx. Low Voc of 465 mV, and VFB of 457 mV are achieved for the samples with sputtered MoOx, while a sample with thermally evaporated MoOx shows a Voc of 700 mV, and a VFB of 626 mV. For both sputtered- and thermally evaporated MoOx, a similar work function was measured of approximately 6 eV and 5 eV before and after annealing treatment, respectively. In addition, a similar iVoc was measured for both types of MoOx. However, sputtered MoOx forms a relatively thick interfacial SiOx layer of 3.3 nm compared to that of the thermally evaporated MoOx of 2.7 nm. For this reason, we suspect that the formation of the relatively thick interfacial SiOx of sputtered MoOx and a difference in SiOx properties may affect the band bending at the hole contact region. This study is a first step towards a better understanding of the losses in selective hole contacts based on sputtered MoOx.
Understanding the Sintering of Digital Inkjet Printed (DIP) Contacts to Achieve Low-contact Resistance on Silicon Solar Cells
Creators: name: Ebong, A.
name: Unsur, V.
name: Chen, N.
name: Chowdhury, A.
Publisher: name: WIP - Renewable Energies and ETA-Florence Renewable Energies
Year: 2014
Subjects: subject: solar cell; inkjet; sintering
subject: 1. PV Technologies, Cells, Modules, Systems

description: Digital inkjet printing (DIP) is a precise and promising technology to create fine gridlines for silicon solar cell. It is based on drop on demand (DoD) technology, which drops only when it is properly aligned to avoid wide gridlines.  The gridline spreading is controlled by heating the chuck (wafer holder) to ≥200oC at the time of the ink droplets. This eliminates drying step that is common to the screen-printing technology and eradicate gridline spreading. The screen-printed technology (SPT) on the other hand cannot exclude the drying step but relies on the silver loading and organics to balance the paste viscosity and rheology, which are used to control the gridline spreading.  The difference between the inkjet and screen-printed inks is the particle size of the paste or ink constituents. While the DIP inks are in the nano-particle range, the SPT counterparts are in the micro-regime. Therefore, understanding the sintering of the nano-particle sizes is needed to achieve low contact resistance and hence high fill factor (FF), which is influenced by the total series resistance of the device. In this paper the microstructural analysis of the inkjet contact system was used to optimize the peak firing temperature for DIP gridlines. The optimized temperature profile found was similar to the SPT. This led to FF of ~79.2% for mono crystalline cell and efficiency of ~19.3% and ~17.4% for multi-crystalline with FF of ~78.5%. It was also found that the series resistance of these cells was not dominated by contact but emitter resistance.
description: 1st Africa Photovoltaic Solar Energy Conference and Exhibition Proceedings, AfricaPVSEC 2014
A Large Dataset to Train Convolutional Networks for Disparity, Optical Flow, and Scene Flow Estimation
Creators: name: Mayer, Nikolaus
name: Ilg, Eddy
name: Häusser, Philip
name: Fischer, Philipp
name: Cremers, Daniel
name: Dosovitskiy, Alexey
name: Brox, Thomas
Publisher: name: arXiv
Year: 2015
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences
subject: I.2.6; I.2.10; I.4.8

description: Recent work has shown that optical flow estimation can be formulated as a supervised learning task and can be successfully solved with convolutional networks. Training of the so-called FlowNet was enabled by a large synthetically generated dataset. The present paper extends the concept of optical flow estimation via convolutional networks to disparity and scene flow estimation. To this end, we propose three synthetic stereo video datasets with sufficient realism, variation, and size to successfully train large networks. Our datasets are the first large-scale datasets to enable training and evaluating scene flow methods. Besides the datasets, we present a convolutional network for real-time disparity estimation that provides state-of-the-art results. By combining a flow and disparity estimation network and training it jointly, we demonstrate the first scene flow estimation with a convolutional network.
description: Includes supplementary material
Cd1-xZnxS Quantum Dots for Photovoltaics Application: First-Principles Study the Effects of the Metal Vacancies on the Structural, Electron and Emission Properties
Creators: name: Shkrebtii / Chkrebtii, A.I.
name: Kupchak, I.M.
name: Korbutyak, D.V.
name: Serpak, N.F.
Publisher: name: WIP
Year: 2020
Subjects: New Materials and Concepts for Photovoltaic Devices
Fundamental Studies

description: 37th European Photovoltaic Solar Energy Conference and Exhibition; 79-82
description: We investigated from the first principles atomic and electronic structure, and optical properties of the bare and passivated CdS, ZnS, and Cd0.5Zn0.5S quantum dots (QDs) by modeling Cd33S33, Zn33S33, and Cd16Zn17S33 atomic clusters. Important for photovoltaics (PV) parameters such as band gap, dielectric function, defect induced states and luminescent properties have been analyzed. It has been found, that a neutral cadmium vacancy in CdS and Cd0.5Zn0.5S forms the local states near the top of the valence band, whereas a zinc vacancy produces the local state at 0.9 eV in the energy gap. Since the experimental photoluminescent (PL) emission spectra of CdS and CdS:Zn QDs are in 2.1 – 2.3 eV range, we conclude that the cadmium vacancies are the possible channels of radiative recombination in Cd1-xZnxS QDs. The research demonstrates that Cd1-xZnxS quantum dots are multipurpose nanosystems for various photovoltaic systems.
PECVD Al2O3 for Surface Passivation: a Review of Solar Cell and Thin Layer Characteristics
Creators: name: Kühnhold, S.
name: Saint-Cast, P.
name: Hofmann, M.
name: Paramanathan, R.
name: El-Safoury, M.
name: Kafle, B.
name: Kania, D.
name: Weiss, L.
name: Heo, Y.
name: Billot, E.
name: Olwal, P.
name: Rentsch, J.
name: Preu, R.
Publisher: name: WIP - Renewable Energies and ETA-Florence Renewable Energies
Year: 2014
Subjects: subject: annealing; lifetime; passivation; PECVD; silicon solar cell; quantum efficiency
subject: 1. PV Technologies, Cells, Modules, Systems

description: A review about Al2O3 surface passivation for Si solar cell applications is presented. Whereat, a focus to the industrially relevant deposition technique PECVD is given. Al2O3 was already adapted to several cell concepts including PERC, PERT, TOPCon, EWT and IBC. Latest record cell efficiencies using Al2O3 passivation are summarized in this publication. Further, the passivation mechanism and the structure of Al2O3 are discussed in detail.
description: 1st Africa Photovoltaic Solar Energy Conference and Exhibition Proceedings, AfricaPVSEC 2014
A Promising Approach for Next Generation Cu(In,Ga)Se2 and Cu2ZnSnS4 Thin Film Chalcogenide Photovoltaics
Creators: name: Ennaoui, A.
Publisher: name: WIP - Renewable Energies and ETA-Florence Renewable Energies
Year: 2014
Subjects: subject: CIGS; light-soaking; performance; thin film solar cell
subject: 1. PV Technologies, Cells, Modules, Systems

description: -
description: 1st Africa Photovoltaic Solar Energy Conference and Exhibition Proceedings, AfricaPVSEC 2014
High Frequency Modulated and Time Resolved Photoluminescence: Towards a Full Temporal Characterization on III-V Semi-Conductor Materials Including Slow Mechanisms
Creators: name: Zhao, W.
name: Rakotoarimanana, C.
name: Goncalves, A.-M.
name: Etcheberry, A.
name: Lombez, L.
name: Bérenguier, B.
name: Guillemoles, J.-F.
Publisher: name: WIP
Year: 2020
Subjects: New Materials and Concepts for Photovoltaic Devices
Fundamental Studies

description: 37th European Photovoltaic Solar Energy Conference and Exhibition; 65-67
description: Time resolved Photoluminescence is a standard technique to probe the recombination paths in photovoltaic semiconductors. However, the effect of slow mechanisms as de-trapping often appears at the end of the decays, and are sometimes covered by the noise. Furthermore, in complex decay cases, one has to postulate recombination mechanisms and to perform to simulations, without insurance that the fitting procedure will lead to unique fits. In this context we upgraded our Frequency Domain setup, also known as High Frequency Modulated Photoluminescence up to 100 MHz. We coupled the both kind of measurements, TRPL and HFMPL with drift diffusion simulation including light reabsorption. Finally, we present several kind of III-V material responses and show how the response can be interpreted more reliably using the 2 methods and the simulations.
Transparent Matrix Materials for Efficient Luminescent Solar Concentrators
Creators: name: Kulish, M.R.
name: Shkrebtii / Chkrebtii, A.I.
name: Kostylyov, V.P.
name: Sachenko, A.V.
name: Sokolovskyi, I.O.
Publisher: name: WIP
Year: 2020
Subjects: New Materials and Concepts for Photovoltaic Devices
Fundamental Studies

description: 37th European Photovoltaic Solar Energy Conference and Exhibition; 68-73
description: Materials, promising as a transparent waveguide matrix for Luminescent Solar Concentrator (LSC) photoconverters are considered. The relevant properties of the most promising LSC matrix materials, such as fused quartz (amorphous SiO2), borosilicate glass and polymethyl methacrylate (PMMA) are analyzed. It is established that the matrix of silicon oxide is transparent in the photoactive spectral region of Sun emission. To date, a low-temperature sol-gel method for the synthesis of SiO2 doped with quantum dots (QDs) has been developed. For borosilicate (BK7) glasses it is detrimental that the transmission spectrum is narrower than the transmission spectrum of SiO2. Usually, doping of BK7 with A2B6 quantum dots is carried out by the recondensation method at high temperatures, which leads to a low luminescence quantum yield. The smallest losses of luminescent photons from escape cone occurs in the LASF35 022291.541 glass matrix with its refractive index of 2.02204. However, most often the LSCs matrices are made of polymethyl methacrylate (PMMA). As estimated, the quantum yield of QD luminophores in doped PMMA matrix is close to unity. The luminescent photons losses in matrices made of PMMA, BK7 glass, and fused quartz are analyzed and wavelength dependence of these losses is estimated.The results discussed have to also be considered when investigating properties of photoconverters with luminescent concentrator in the stack.
Crystallization Behavior of CZTSSe by Selenization of Sputtered CZTS Precursors
Creators: name: Temgoua, S.
Publisher: name: WIP - Renewable Energies and ETA-Florence Renewable Energies
Year: 2014
Subjects: subject: annealing; crystallisation; CZTSSe, SnSe2
subject: 1. PV Technologies, Cells, Modules, Systems

description: In this work, we study the effect of annealing on crystallization behavior of Cu2ZnSn(SxSe1-x)4 (CZTSSe) absorbers. Cu-Zn-Sn-S precursors are deposited on glass/Mo substrate by cosputtering of Cu, ZnS, and SnS. In order to have a better understanding of the mechanisms of formation of CZTSSe and secondary phases during annealing, the effect of annealing temperatures between 300 and 600°C, and annealing time from 1 to 60 min on structural and compositional properties of the cells have been studied. For the best annealing conditions, efficiencies between 2.3% and 7% were obtained. A comparison of material and solar cells properties extracted from chemical, structural and opto-electronic characterizations shows that whatever the annealing conditions, there is a simultaneous formation of CZTSSe and SnSe2 phases. We showed that these binaries are detrimental for the performance of solar cells, leading to a decrease of the Voc and FF.
description: 1st Africa Photovoltaic Solar Energy Conference and Exhibition Proceedings, AfricaPVSEC 2014
Magnetic ground state and spin fluctuations in MnGe chiral magnet as studied by Muon Spin Rotation
Creators: name: Martin, N.
name: Deutsch, M.
name: Bert, F.
name: Andreica, D.
name: Amato, A.
name: Bonfà, P.
name: De Renzi, R.
name: Rössler, U. K.
name: Bonville, P.
name: Fomicheva, L. N.
name: Tsvyashchenko, A. V.
name: Mirebeau, I.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We have studied by muon spin resonance (μSR) the helical ground state and fluctuating chiral phase recently observed in the MnGe chiral magnet. At low temperature, the muon polarization shows double period oscillations at short time scales. Their analysis, akin to that recently developed for MnSi [A. Amato et al., Phys. Rev. B 89, 184425 (2014)], provides an estimation of the field distribution induced by the Mn helical order at the muon site. The refined muon position agrees nicely with ab initio calculations. With increasing temperature, an inhomogeneous fluctuating chiral phase sets in, characterized by two well separated frequency ranges which coexist in the sample. Rapid and slow fluctuations, respectively associated with short range and long range ordered helices, coexist in a large temperature range below T$_{N}$ = 170 K. We discuss the results with respect to MnSi, taking the short helical period, metastable quenched state and peculiar band structure of MnGe into account.
description: 13 pages, 11 figures
Recent Results on Carrier Selective Three Terminal Perovskite on Silicon-IBC Tandem Solar Cells
Creators: name: Connolly, J.P.
name: Ahanobge, K.
name: Kleider, J.-P.
name: Alvarez, J.
name: Kanda, H.
name: Nazeeruddin, M.K.
name: Mihailetchi, V.D.
name: Baranek, P.
name: Vogt, M.
name: Santbergen, R.
name: Isabella, O.
Publisher: name: WIP
Year: 2020
Subjects: New Materials and Concepts for Photovoltaic Devices
New Materials and Concepts for Cells and Modules

description: 37th European Photovoltaic Solar Energy Conference and Exhibition; 56-61
description: The most successful high efficiency design, and one of the oldest, is the multi-junction solar cell. There are a range of multijunction solar cell terminal configurations, the specificities of which are reviewed, concluding with noting the increased attention being given to three terminal designs. This introduces a new device design which is the Three Terminal Selective Band Offset Barrier tandem solar cell. The physical operation of this new device is examined, and embodiments in prototype materials relying on materials properties from the literature. We present projected performance evaluated by two dimensional numerical modelling. Identifying shortcomings on two fronts of materials and optical properties of the multilayer stack, we describe theoretical progress in optimising these properties via ab initio materials modelling and combined ray and wave optics. This theoretical context introduces the experimental results obtained in the first year of the project. This consists of successful integration of the selective band offset barrier on a suitably modified IBC structure using prototype materials previously reported. This paper thereby presents detailed analysis of the three terminal selective band offset barrier tandem solar cell, and announces the first experimentally fabricated three terminal selective band offset barrier solar cells, together with preliminary conclusions of experimental characterisation which is underway.
Near-infrared scintillation of liquid argon
Creators: name: Alexander, T.
name: Escobar, C. O.
name: Lippincott, W. H.
name: Rubinov, P.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Since the 1970s it has been known that noble gases scintillate in the near infrared (NIR) region of the spectrum (0.7 $μ$m < $λ$; < 1.5$μ$m). More controversial has been the question of the NIR light yield for condensed noble gases. We first present the motivation for using the NIR scintillation in liquid argon detectors, then briefly review early as well as more recent efforts and finally show encouraging preliminary results of a test performed at Fermilab.
description: 9 pages, 7 figures, contribution to the proceedings of the conference Light Detection in Noble Elements (LIDINE 2015)
Modeling and Simulation of CdZnO/ZnO Heterostructure Based Multiple Quantum Wells for Photovoltaics
Creators: name: Siddharth, G.
name: Singh, R.
name: Mukherjee, S.
Publisher: name: WIP
Year: 2020
Subjects: New Materials and Concepts for Photovoltaic Devices
Fundamental Studies

description: 37th European Photovoltaic Solar Energy Conference and Exhibition; 62-64
description: This work proposes replacing the intrinsic layer of p-i-n solar cell by CdZnO/ZnO heterostructure based Multiple Quantum Well after simulated evaluation of such a device’s performance. The results obtained from the simulated model in the ATLAS simulation tool shows good agreement with those from developed analytical model, in terms of performance parameters i.e. Jsc (~98%), Voc (~96%) and (~93%) matching is achieved. The effect of the number of quantum wells on the performance parameters of CdZnO/ZnO based MQWSC is analyzed. Further, the effect of well and barrier layer thickness on the conversion efficiency of the MQWSC is also investigated. Significantly, spectral irradiance from ASTM standard data sheets is used for attaining photon flux density instead of generally used Planck’s blackbody radiation law.
Cavity Optomechanics with Ultra Cold Atoms in Synthetic Abelian and Non-Abelian Gauge Field
Creators: name: Padhi, Bikash
name: Ghosh, Sankalpa
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: In this article we present a pedagogical discussion of some of the optomechanical properties of a high finesse cavity loaded with ultracold atoms in laser induced synthetic gauge fields of different types. Essentially, the subject matter of this article is an amalgam of two sub-fields of atomic molecular and optical (AMO) physics namely, the cavity optomechanics with ultracold atoms and ultracold atoms in synthetic gauge field. After providing a brief introduction to either of these fields we shall show how and what properties of these trapped ultracold atoms can be studied by looking at the cavity (optomechanical or transmission) spectrum. In presence of abelian synthetic gauge field we discuss the cold-atom analogue of Shubnikov de Haas oscillation and its detection through cavity spectrum. Then, in the presence of a non-abelian synthetic gauge field (spin-orbit coupling), we see when the electromagnetic field inside the cavity is quantized, it provides a quantum optical lattice for the atoms, leading to the formation of different quantum magnetic phases. We also discuss how these phases can be explored by studying the cavity transmission spectrum.
description: Invited Review Article in the journal Atom
Die Übermittlung des Glaubens in ihrer Bedingtheit durch die Gesellschaftsstrukturen von heute
Creators: name: Echarren, Ramón
Publisher: name: Concilium
Year: 1970

description: Concilium, Bd. 6 Nr. 3 (1970): Concilium: Internationale Zeitschrift für Theologie, Band 6, Heft 3
CIGS: State of the Art Thin-Film PV
Creators: name: Kuhn, C.
Publisher: name: WIP - Renewable Energies and ETA-Florence Renewable Energies
Year: 2014
Subjects: subject: CIGS; thin film; turn key; local content; manufacturing
subject: 1. PV Technologies, Cells, Modules, Systems

description: -
description: 1st Africa Photovoltaic Solar Energy Conference and Exhibition Proceedings, AfricaPVSEC 2014
Spray Pyrolysis – A Versatile Technique for Thin Film Deposition in PV
Creators: name: Bartsch, J.
name: Heitmann, U.
name: Jakob, L.
name: Mahmoud Algazzar, R.
name: Tutsch, L.
name: Hermann, R.
name: Kluska, S.
name: Bivour, M.
name: Bläsi, B.
name: Hauser, H.
name: Janz, S.
name: Glatthaar, M.
Publisher: name: WIP
Year: 2020
Subjects: New Materials and Concepts for Photovoltaic Devices
New Materials and Concepts for Cells and Modules

description: 37th European Photovoltaic Solar Energy Conference and Exhibition; 44-47
description: Different applications of spray coating and spray pyrolysis processes in photovoltaics are presented in this paper. These include the deposition of thin dielectric layers (AlOx, TiOx, ZnO) and layer stacks, the deposition of TCOs and spray coating of organic solutions. The applications range from optically active layers to absorber layers and transparent conductive adhesives in tandem solar cells. Sprayed layers and layer stacks have been shown to be suitable for coating of thin ITO in silicon heterojunction solar cells, for MorphoColor® coating of glass panes and for double layer ARCs in standard solar cells. A sprayed IZO interconnect has been demonstrated in III-V on silicon tandem solar cells.
Luminescent Characteristics of Wire-on-Well Nanostructure Solar Cells
Creators: name: Asami, M.
name: Yokota, R.
name: Watanabe, K.
name: Nakano, Y.
name: Sugiyama, M.
Publisher: name: WIP
Year: 2020
Subjects: New Materials and Concepts for Photovoltaic Devices
New Materials and Concepts for Cells and Modules

description: 37th European Photovoltaic Solar Energy Conference and Exhibition; 48-50
description: Preceding studies applied InGaAs/GaAs/GaAsP quantum structures to solar cells, aiming to adjust the bandgap of sub-cells for multi junction solar cells. As research of solar cells containing quantum structures progressed, it was found that Wire-on-Well (WoW) nanostructure solar cells are superior to conventional planar superlattice (PSL) solar cells in terms of the photo-generated carrier collection efficiency. However, many physical properties of this unique nanostructure, WoW, still remain unknown. Further fundamental studies are needed to put WoW solar cells into practical use. In order to achieve high energy conversion efficiency, the gap between the realized open circuit voltage and its theoretical upper limit must be small. Our study evaluated the device characteristics of WoW solar cells more completely not only by I-V characteristics but also by electroluminescence (EL) measurements which enables us to compare the gap of open circuit voltage among the GaAs cells with WoW, PSL, and without superlattice. We revealed that Wire on Well nanostructure would improve the energy conversion efficiency of multi junction solar cells.
Two-dimensional Infrared Spectroscopy of vibrational polaritons of molecules in an optical cavity
Creators: name: Saurabh, Prasoon
name: Mukamel, Shaul
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Strong coupling of molecular vibrations to an infrared cavity mode affects their nature by creating dressed polariton states. We show how the single and double vibrational polariton manifolds may be controlled by varying the cavity coupling strength, and probed by a time domain 2DIR technique, Double Quantum Coherence (DQC). Applications are made to the amide-I ($CO$) and amide-II ($CN$) bond vibrations of $N-methylacetamide$ (NMA).
description: 16 pages, 6 figures, 1 table
A conserved two-component system senses intracellular iron levels and regulates redox balance in Mycobacterium spp. (Spectrum01106-24R1-Supplemental_material.docx)
Creators: name: Yadav, Rahul
name: Saini, Deepak Kumar
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 310701
subject: Bacteriology

description: For bacteria, an intricate coordination between sensing and regulating iron levels and managing oxidative stress is required as their levels are tightly interlinked. While various oxidative stress and heme-based redox sensors have been reported for both pathogenic and non-pathogenic bacteria, the mechanisms governing the modulation of intracellular iron levels in response to changes in redox status remain unclear. In this study, a gene-inactivated strain of mycobacterial sensor kinase PdtaS showed dysregulated expression of genes associated with iron metabolism, including Fe-S clusters, NADH dehydrogenases, and iron uptake. The strain showed poor growth in nutrient-limiting conditions, a defect rescuable by heme but not by Fe3+ supplementation. This observation was associated with the PAS domain of the PdtaS sensor kinase. Biochemical and biophysical experiments established heme-binding to the PAS domain and its inhibitory effect on PdtaS auto-kinase activity, suggesting that the absence of heme induces activation of this sensor kinase. Interestingly, despite having an endogenous heme biosynthetic pathway or even external heme supplementation, the ∆pdtaS mutant exhibited persistent low intracellular iron levels concomitant with elevated oxidative stress. Antioxidant supplementation mitigated growth defects, emphasizing the link between oxidative stress, intracellular iron levels, and PdtaS activity. RNA-IP identified key targets associated with redox homeostasis and iron metabolism as targets of the PdtaR response regulator. The study proposes a novel role for the PdtaS-PdtaR TCS in sensing heme, regulation of intracellular iron levels and redox balance.
Spectrum01106-24R1-Supplemental_material.docx
Creators: name: Yadav, Rahul
name: Saini, Deepak Kumar
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 310701
subject: Bacteriology

description: For bacteria, an intricate coordination between sensing and regulating iron levels and managing oxidative stress is required as their levels are tightly interlinked. While various oxidative stress and heme-based redox sensors have been reported for both pathogenic and non-pathogenic bacteria, the mechanisms governing the modulation of intracellular iron levels in response to changes in redox status remain unclear. In this study, a gene-inactivated strain of mycobacterial sensor kinase PdtaS showed dysregulated expression of genes associated with iron metabolism, including Fe-S clusters, NADH dehydrogenases, and iron uptake. The strain showed poor growth in nutrient-limiting conditions, a defect rescuable by heme but not by Fe3+supplementation. This observation was associated with the PAS domain of the PdtaS sensor kinase. Biochemical and biophysical experiments established heme-binding to the PAS domain and its inhibitory effect on PdtaS auto-kinase activity, suggesting that the absence of heme induces activation of this sensor kinase. Interestingly, despite having an endogenous heme biosynthetic pathway or even external heme supplementation, the ∆pdtaS mutant exhibited persistent low intracellular iron levels concomitant with elevated oxidative stress. Antioxidant supplementation mitigated growth defects, emphasizing the link between oxidative stress, intracellular iron levels, and PdtaS activity. RNA-IP identified key targets associated with redox homeostasis and iron metabolism as targets of the PdtaR response regulator. The study proposes a novel role for the PdtaS-PdtaR TCS in sensing heme, regulation of intracellular iron levels and redox balance
Silicon Solar Cell Emitter Profile Tailoring Using the DOSS Diffusion Technique
Creators: name: Chaoui, R.
name: Mahmoudi, B.
name: Messaoud, A.
name: Si Ahmed, Y.
name: Mefoued, A.
name: Mahmoudi, Br.
Publisher: name: WIP - Renewable Energies and ETA-Florence Renewable Energies
Year: 2014
Subjects: subject: doping; silicon; emitter; dead layer; residual diffusion oxide
subject: 1. PV Technologies, Cells, Modules, Systems

description: A tight control of the dopant surface concentration is important during phosphorus emitter diffusion due to the opposite requirements of a lowly doped emitter for good blue response and a sufficiently high surface concentration for a good ohmic contact. The Doped Oxide Solid Source (DOSS) diffusion technique is well suited for fine-tuning of the surface concentration. The sources are made in the laboratory using the standard POCl3 diffusion technique and the source doping level can be controlled by changing the partial pressure of POCl3. DOSS diffusions were carried out in the temperature range 850-1050°C using sources with different doping levels obtained by varying the POCl3 partial pressure from 0.004% to 4.28%.  The electrical profiles were measured using the Stripping Hall profiling technique. For the entire range of source doping concentrations and temperatures investigated, the obtained emitters were of the finite source emitter type and the profiles showed a surface concentration below the electrically active limit, thus implying the absence of a dead layer. The residual diffusion oxide was characterized using ellipsometry and XPS profiling. The oxide thickness increased with both temperature and source doping level within the range 7.5-30 nm.  XPS profiling indicated that the composition of the residual glass was a mixture of P2O5 and SiO2. The phosphorus was not homogeneously distributed across the oxide but exhibited a pile-up in the near oxide surface region and also at the oxide/Si interface.
description: 1st Africa Photovoltaic Solar Energy Conference and Exhibition Proceedings, AfricaPVSEC 2014
Power spectrum of flow fluctuations in relativistic heavy-ion collisions
Creators: name: Saumia, P. S.
name: Srivastava, Ajit M.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Nuclear Theory (nucl-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We carry out hydrodynamical simulation of the evolution of fluid in relativistic heavy-ion collisions with random initial fluctuations. The time evolution of power spectrum of momentum anisotropies shows very strong correspondence with the physics of cosmic microwave anisotropies as was earlier predicted by some of us. In particular our results demonstrate suppression of superhorizon fluctuations and the correspondence between the location of the first peak in the power spectrum of momentum anisotropies and the length scale of fluctuations and expected freezeout time scale (more precisely, the sound horizon size at freezeout).
description: 4 pages, 4 figures