A5027290284- Conducting polymers and applications
- Organic Electronics and Photovoltaics
- Rare-earth and actinide compounds
- Advanced Sensor and Energy Harvesting Materials
- Magnetic properties of thin films
- Iron-based superconductors research
- Nanomaterials and Printing Technologies
- Perovskite Materials and Applications
- Metal and Thin Film Mechanics
- Advanced Chemical Physics Studies
- Advanced Condensed Matter Physics
- Thin-Film Transistor Technologies
- Heusler alloys: electronic and magnetic properties
- Supercapacitor Materials and Fabrication
- Nanowire Synthesis and Applications
- Semiconductor materials and interfaces
- Surface and Thin Film Phenomena
- Advanced Battery Technologies Research
- Electronic Packaging and Soldering Technologies
- Magnetic Properties and Applications
- ZnO doping and properties
- Photonic and Optical Devices
- Neuroscience and Neural Engineering
- Electron and X-Ray Spectroscopy Techniques
- 3D IC and TSV technologies
VTT Technical Research Centre of Finland
2020-2024
Tampere University
2016-2020
Printed Electronics (United Kingdom)
2018
Tampere University of Applied Sciences
2016-2017
Queen's University
2010-2014
Université de Limoges
2012-2014
Centre National de la Recherche Scientifique
2012-2014
Lakehead University
2008-2011
Memorial University of Newfoundland
2010
Trent University
2010
Abstract Epidermal electronic systems (EESs) are skin-like systems, which can be used to measure several physiological parameters from the skin. This paper presents materials and a simple, straightforward fabrication process for skin-conformable inkjet-printed temperature sensors. sensors already presented in some studies, but they mainly fabricated using traditional photolithography processes. These routes have processing steps create substantial amount of material waste. Hence utilizing...
The comparison of solution processed organic photovoltaics with two roll-to-roll coated electron transport layers (ETL), as well printed grid or solid back electrodes provides insight into the future R2R fabricated architectures. variation in performance slot-die zinc oxide (ZnO) versus tin (SnO2), showed a clear dependence on spectrum illumination source. It was found that under indoor light conditions (200–1000 lux LED and fluorescent sources) SnO2 outperformed ZnO highest efficiencies...
First-principles full potential nonrelativistic calculations of the total energy fcc Cu for various deformations cubic unit cell give values three elastic constants in good agreement with experiment. Use is made simple formulas strain tetragonal and trigonal terms constants. The as a function shape body-centered-tetragonal at constant volume does not have minimum bcc structure, it concluded that unstable respect to [110] shears. However, this instability prevent expitaxial growth on (001) surfaces.
The atomic and magnetic structure of fcc Fe grown on Cu(100) are determined using spin-density-functional theory the full-potential linear muffin-tin orbital method. Different types interlayer intralayer magnetism investigated. For films four up to eleven adsorbed layers our ab initio total-energy calculations always give a ferromagnetic spin ordering atoms. surface first subsurface couple ferromagnetically, whereas deeper ones show antiferromagnetic coupling. This is accompanied by 3.9%...
High-throughput manufacturing of hybrid halide perovskite solar cells is the next challenge before they enter market. An anti-solvent bath generally required to control film assembly starting from precursors in solution. Although an has proven feasible for roll-to-roll deposition, it implies undoubted increased complexity line, meaning enhanced costs process itself and disposal. Here, we take advantage use a starch polymer as rheological modifier precursor solutions avoid bath. Starch allows...
The magneto-optical (MO) Kerr spectra of the isochemical uranium compounds US, USe, and UTe are investigated from first principles, using density-functional theory in local spin-density approximation relativistic augmented-spherical-wave band-structure method. Fully relativistic, optical transition-matrix elements derived Dirac theory. ab initio calculated compare reasonably well with experimental height, but theoretical exhibit a double peak structure, whereas ones show only one vague...
The industrialization of perovskite solar cells relies on solving intrinsic-to-material issues. To reach record efficiencies deposition needs to be finely adjusted by multi-step processes, in a humidity free glove-box environment and means hardly scalable techniques often associated with toxic solvents anti-solvent dripping/bath. Herein, the use polymeric material is proposed deposit layers easy processability. scope, starch-polymer/perovskite composite developed suit slot-die coating...
The magneto-optical (MO) spectra of 15 ternary ferromagnetic compounds are investigated on the basis local-density band-structure calculations. key material interest in this study is PtMnSb, for which MO Kerr unusually large and quite different from that of, e.g., isoelectronic NiMnSb PdMnSb. First we show spectral differences between NiMnSb, PdMnSb, PtMnSb can be fully understood their relativistic electronic structure. Further, investigate following compounds: PtMnSn, PtCrSb, PtFeSb,...
The anomalous properties of the Pu monochalcogenides are investigated on basis electronic structure calculations. calculated to be semimetallic because, first large spin-orbit interaction $5f$ states splits ${5f}_{5/2}$ and ${5f}_{7/2}$ subbands away from Fermi energy, second hybridization between $6d$ chalcogenide p bands leads a gap. lattice constants, which correspond neither ${\mathrm{Pu}}^{2+}$ nor ${\mathrm{Pu}}^{3+}$ consistent with energy band approach, as is constant where...
First-principles band-structure calculations of the magneto-optical Kerr spectra MnBi and related compounds are reported. We find that theory, based on density-functional theory in local spin-density approximation, explains measured effect very well. A giant rotation about −1.75° at 1.8 eV photon energy is given by our ab initio calculations, accordance with recent experiments. second peak 3.4 spectrum, however, comes out smaller than what was recently measured. It discussed this can be due...
We report ab initio calculations of the ground state and optical properties CeN, which show that 4f electrons in CeN are itinerant intra-atomic 4f-Coulomb interaction is largely screened. A coherent band width \ensuremath{\sim}2 eV formed, from an accurate description spectrum obtained. The lattice parameter, linear specific heat coefficient, magnetic susceptibility also well reproduced. While was previously classified to be a mixed valence compound, our results more appropriate picture...
The magneto-optical spectra of the compounds (with X = V, Cr, Mn, Fe and Co) are calculated for their ferromagnetic phase in crystal structure, using density-functional band-structure theory. Large polar Kerr effects predicted several these compounds, with - a reasonable spectral broadening 0.4 eV maximum rotations , respectively. (001) magnetization found to be very similar shape, as also those . origin large effect alloys is shown caused by spin orbit coupling strength Pt. A magnetic...
A spironaphthoxazine (SO) photoswitch was synthesized, and its photochromic behaviors were investigated. SO underwent reversible ring-opening/closure isomerization between a spirocyclic isomer (closed form) merocyanine (MO isomer, open upon ultraviolet light irradiation. For the model in this work, thermal equilibrium is substantially shifted toward even at -30.0 °C. However, addition of zinc, as Zn(ClO(4))(2), exerted an important effect on reversion process from (MO) to closed form (SO)....
Abstract The future of printed electronics involves advancements not only related to full system integration, but also lean process manufacturing. A critical aspect this progress is developed in study, which evaluates a highly flexible screen through-hole-via using silver microparticle inks, for applications energy harvesting and storage modules. vias’ fabrication durability are evaluated by means double sided screen-printing method repetitive (cyclic) bending tests. Vias, through...
Abstract For the first time, necessity to thermally pre-treat ubiquitously used PET substrates for printed electronics, improve dimensional stability during manufacturing, is clearly defined. The experimental results have proven this phenomenon both roll-to-roll (R2R) and sheet-to-sheet (S2S) processing of electronics. next generation electronics manufacturing has pushed boundaries low-cost, flexible, printed, mass produced electronic components systems. A driving force, enabling production...
The magneto-optical Kerr spectra of the ternary uranium compound UAsSe are investigated using first-principles energy-band theory. Within a bandlike description $5f$ electrons, good agreement with measured optical is obtained. This further evidence for at least partially itinerant electrons in UAsSe, spite it frequently being characterized as localized electron system. It suggested that delocalized planes perpendicular to $c$ axis and extremely anisotropic.
We review the history and current state of art diodes fabricated with organic semiconductors other printable materials. In particular, we look at integration printed into circuits systems for applications, particular emphasis on rectification, energy harvesting, negative differential resistance (e.g. tunnel diodes). An overview solution processed inorganic materials utilised in is provided an depth analysis their physics operation. Furthermore, it explained how diverse array which can be...
We report first-principles calculations of the polar magneto-optical (MO) Kerr spectra Ce compounds CeSb, CeSb0.75Te0.25, CeTe, and CeSe, using local-density approximation (LDA) density-functional theory as well its generalization which contains an explicit Coulomb interaction U (LDA+U). Although LDA predicts a large rotation about 20° in we find that LDA+Ugives better description all four compounds. For CeSb LDA+U colossal 45° up to 60°, agreement with recent discovery maximal observable...
The magneto-optical Kerr effect is investigated from first principles, using density-functional theory in the local-density approximation, for two different magnetization orientations of both fcc and hcp phase Co. For a negligible anisotropy found spectra (100) (110) directions. polar calculated (0001) (112\ifmmode\bar\else\textasciimacron\fi{}0) directions, distinct these found, which agrees with experimental spectra. origin analyzed, it concluded that over broad energy range this magnetic...
Indium tin oxide (ITO)-free inverted polymer solar cells (PSCs) have been fabricated without the need of an additional electron transport layer. The indium-free transparent electrode consists a tri-layer stack ZnO (30 nm)/Ag (14 nm)/ZnO nm) deposited on glass and plastic substrates via ion-beam sputtering. electrodes exhibit similar physical properties to its ITO counterpart, specifically yielding high transmittance low resistivity (76.5% T at 550 nm, Rsq 8 Ω/◻) substrates. novel allows for...