A5014372729- Silicon and Solar Cell Technologies
- Semiconductor materials and interfaces
- Thin-Film Transistor Technologies
- Silicon Nanostructures and Photoluminescence
- Sports injuries and prevention
- Semiconductor Quantum Structures and Devices
- Cardiovascular and exercise physiology
- Magnetic and transport properties of perovskites and related materials
- Advanced Condensed Matter Physics
- Electronic and Structural Properties of Oxides
- Tendon Structure and Treatment
- Semiconductor materials and devices
- Diamond and Carbon-based Materials Research
- Ion-surface interactions and analysis
- Advanced ceramic materials synthesis
- Advancements in Semiconductor Devices and Circuit Design
- Cerebral Palsy and Movement Disorders
- Muscle activation and electromyography studies
- Acute Ischemic Stroke Management
- Laser Material Processing Techniques
- Organic Light-Emitting Diodes Research
- Cardiovascular Effects of Exercise
- Molecular Junctions and Nanostructures
- Peripheral Artery Disease Management
- Knee injuries and reconstruction techniques
Aarhus University
2024-2025
Aarhus University Hospital
2023-2025
Sandvik (Norway)
2008-2009
Renewable Energy Corporation (Norway)
2006-2009
Institute for Energy Technology
2005-2006
Energy Institute
2005-2006
KTH Royal Institute of Technology
2001-2003
University of Geneva
2000-2002
We have investigated the gettering of transition metals in multicrystalline silicon wafers during a phosphorus emitter diffusion for solar cell processing. The results show that mainly regions high initial recombination lifetime exhibit significant enhancement upon gettering. Nevertheless, metal profiles extracted by secondary ion mass spectrometry region low reveal gradients Cr, Fe, and Cu concentrations towards surface after diffusion, without exhibiting lifetime. In higher lifetime,...
Muscle power is an important physical capability across all age groups and health statuses. Typically, assessing lower limb muscle requires expensive sophisticated equipment to ensure reliability validity of power. Hence, there exists a clear need identify simple effective functional performance test that can serve as proxy for evaluating when unavailable. Thus, this study aimed easily administered, assess unilateral Correlations between maximal leg extensor (LEP) were measured using the...
The introduction of selective emitters underneath the front contacts solar cells can considerably increase cell efficiency. Thus, cost-effective fabrication methods for this process step would help to reduce cost per W <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">p</inf> silicon cells. Laser Chemical Processing (LCP) is based on waterjet-guided laser (LaserMicroJet®) developed and commercialized by Synova S.A., but uses a chemical jet. This...
High concentration in-diffusion of phosphorus in both Czochralski grown and solar grade multicrystalline Si from a spray-on liquid source has been studied by secondary ion mass spectrometry electrochemical capacitance-voltage profiling. By extraction the dependent effective diffusivity employing Boltzmann-Matano analysis, we adapt an integrated diffusion model based on previous work Uematsu [J. Appl. Phys. 82, 2228 (1997)], order to gain insight into mechanisms governing such in-diffusions....
The evolution of the loading effect in Si1−xGex layers (0⩽x⩽20%) versus growth parameters has been investigated for selective and nonselective using silane- dichlorosilane-based epitaxy. Various methods have examined order to reduce effect, their influence on defect density will be further discussed. High-resolution x-ray diffraction atomic force microscopy were applied as main tools these investigations. It is shown that SiGe epitaxy strongly sensitive opening size patterned substrates....
Abstract We have investigated the influence of diffusion temperature during phosphorus emitter from a spray‐on source on performance screen‐printed multicrystalline silicon solar cells. Because dual mechanism present at high concentration in‐diffusion in silicon, applying lower temperatures for longer duration results significantly enhanced penetration low tail relative to region. Moreover, we show that sheet resistance in‐diffused emitters depends primarily extension region, thus different...
Blood flow restriction exercise (BFRE) appears to provide a unique opportunity preserve lower limb muscle and function in patients with an Achilles tendon rupture. The purpose of this study was investigate the feasibility BFRE Additionally, evaluate volume patient-reported ankle function, symptoms, complications, physical activity following 12 weeks BFRE. Feasibility measured by adherence training sessions, drop-out rate, intervention acceptability, pain exacerbation (NRS), adverse events....
We present a study of the electronic structure and optical properties Si3N4 Si2N3H in crystalline amorphous phases by first-principles calculations. find that besides structural disorder those matrix atoms with dangling floating bonds contribute to energy levels close Fermi level. From comparative analysis calculated spectra we conclude difference between silicon nitrides—either hydrogenated or unhydrogenated—is only small. It is mainly range fundamental band gap. At larger energies...
To examine the feasibility and safety of blood flow restricted walking (BFR-W) in patients with intermittent claudication (IC). Moreover, to evaluate changes objective performance-based self-reported functioning following 12 weeks BFR-W.Sixteen IC were recruited from two departments vascular surgery. The BFR-W programme implied application a pneumatic cuff around proximal part affected limb at 60% occlusion pressure five intervals 2 min, four times per week for weeks. Feasibility was...
We have used a scanning tunneling microscope in potentiometry mode to investigate the local electric potential distribution current carrying epitaxial ${\mathrm{La}}_{0.7}{\mathrm{Sr}}_{0.3}{\mathrm{MnO}}_{3}$ thin films, with magnetotransport properties similar ones of single crystals. Scans imaging simultaneously surface topography and been obtained an unprecedented resolution. In textured ${\mathrm{La}}_{0.7}{\mathrm{Sr}}_{0.3}{\mathrm{MnO}}_{3}/\mathrm{MgO},$ sharp steps coincide some...
We have studied the variations in recombination lifetime and density of non-recombinative traps between wafers through entire height a multicrystalline silicon block. find that low regions very bottom top part an ingot are described by relatively high traps. It is argued region in-diffused impurities from crucible, as well grain boundaries dislocations, could be major trap contributors. In upper region, trapping believed to due concentrations metallic impurities, caused segregation during...
The quality and temperature stability of surface passivation silicon by a double layer consisting hydrogenated amorphous thin film capped nitride anti-reflection coating are studied. It is established that the effect can be significantly enhanced after short annealing for temperatures up to about 500degC, whereas at higher results in degradation properties. found increased effective recombination lifetime below 500degC from hydrogen redistribution interface region. Furthermore, presence...
Optimally doped epitaxial La0.7Sr0.3MnO3/SrTiO3 thin films have been probed by scanning tunneling potentiometry in a search for possible mesoscopic phase separation. The experiments were performed ultrahigh vacuum after an situ deposition, which prevents local inhomogeneities from forming due to surface contamination. Resulting reproducible two-dimensional images reveal clear topographic features and continuous potentiometric variations. These results support the idea that separation is not...
Former athlete, 30 years of age, suffered several months moderate anterior knee pain during daily life activities where such as negotiating stairs and lifting heavy objects were moderately painful. Magnetic resonance imaging showed normal meniscus cruciate ligaments no extra joint fluid. The patient was referred to a physiotherapist who introduced strengthening program. Low-load resistance training with concurrent blood flow restriction can induce significant gains in maximal muscle strength...
Relaxation of SiGe layers grown selectively or non-selectively on oxide-patterned substrates using reduced pressure chemical vapor deposition was investigated. The influences the buffer layer, polycrystalline layer oxide and opening size critical thickness for relaxation have been studied in detail. High resolution reciprocal lattice mapping, atomic force microscopy Normanski optical microscope used as main characterization tools.
The evolution of the emitter sheet resistance upon phosphorus in-diffusion from a spray-on dopant has been studied in temperature range 840-990 /spl deg/C. In complement with investigations diffusion profiles, by both electrochemical capacitance-voltage profiling and secondary ion mass spectrometry, we find that is determined directly depth flat plateau near surface profiles electrically active phosphorus. Thus, respect to resistance, an can be regarded as constant concentration abrupt box...
Background: Blood flow restriction exercise (BFRE) has been proposed as a viable method for preserving muscle mass and function after an injury during periods of load restrictions such acute Achilles tendon rupture. However, its effectiveness safety in patients with rupture have yet to be evaluated randomized trial.Objectives: First, investigate the early initiated BFRE non-surgically treated Second, evaluate whether it is better apply beginning (1-12 weeks) or later (13-24 rehabilitation...
Blood flow restriction exercise (BFRE) has been proposed as a viable method for preserving muscle mass and function after an injury during periods of load restrictions such acute Achilles tendon rupture. However, its effectiveness safety in patients with rupture have yet to be evaluated randomized trial. First, investigate the early initiated BFRE non-surgically treated Second, evaluate whether it is better apply beginning (1-12 weeks) or later (13-24 rehabilitation period. This...
The growth of heterojuntion bipolar transistor structures using chemical vapor deposition has been investigated. Generation defects in selectively or nonselectively grown collector layers arsenic as the dopant studied. Minimizing defect density SiGe base by optimizing rate also investigated detail. High resolution reciprocal lattice mapping, atomic force microscopy and secondary ion mass spectrometry have used main characterization tools.