Sökning: "fill factor"

Visar resultat 16 - 20 av 44 avhandlingar innehållade orden fill factor.

1. 16. Process Development for Electron Beam Melting of 316LN Stainless Steel

   Författare :Stefan Roos; Lars-Erik Rännar; Andrei Koptioug; Jonas Danvind; Lars Pejryd; Mittuniversitetet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; additive manufacturing; beam deflection rate; electron beam melting; energy input; material properties; microstructure; powder bed fusion; process parameters; 316LN stainless steel;

   Sammanfattning : Additive manufacturing (AM) is a technology that inverts the procedure of traditional machining. Instead of starting with a billet of material and removing unwanted parts, the AM manufacturing process starts with an empty workspace and proceeds to fill this workspace with material where it is desired, often in a layer-by-layer fashion. LÄS MER

3. 17. Multicomponent Resonant Nanostructures: Plasmonic and Photothermal Effects

   Författare :Vadim Zakomirnyi; Hans Ågren; Zilvinas Rinkevicius; Sergey Karpov; Davy Gérard; KTH; []
   Nyckelord :plasmonics; photonics; nanoparticles; Teoretisk kemi och biologi; Theoretical Chemistry and Biology;

   Sammanfattning : In recent decades, plasmonic nanoparticles have attracted considerable attention due to their ability to localize electromagnetic energy at a scale much smaller than the wavelength of optical radiation. The study of optical plasmon waveguides (OPWs) in the form of chains of nanoparticles is important for modern photonics. LÄS MER

4. 18. Cadmium Free Buffer Layers and the Influence of their Material Properties on the Performance of Cu(In,Ga)Se2 Solar Cells

   Författare :Adam Hultqvist; Charlotte Platzer-Björkman; Tobias Törndahl; Marika Edoff; Takashi Minemoto; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Cu In; Ga Se2; Solar cells; Thin film; Buffer layer; Window layer; ZnO; Zn O; S ; Zn; Mg O; Zn-Sn-O; Semiconductor physics; Halvledarfysik; Engineering Science with specialization in Solid State Physics; Teknisk fysik med inriktning mot fasta tillståndets fysik;

   Sammanfattning : CdS is conventionally used as a buffer layer in Cu(In,Ga)Se2, CIGS, solar cells. The aim of this thesis is to substitute CdS with cadmium-free, more transparent and environmentally benign alternative buffer layers and to analyze how the material properties of alternative layers affect the solar cell performance. LÄS MER

5. 19. Hot-carrier extraction in nanowires

   Författare :Jonatan Fast; NanoLund: Centre for Nanoscience; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Nanowire; Hot carrier; photovoltaic; Thermoelectric; Fysicumarkivet A:2023:Fast;

   Sammanfattning : A hot-carrier solar cell aims to generate power from energetic, photoexcited, charge carriers, so called hot carriers, in order to reach higher conversion efficiencies than current solar cell technology.Creating a hot-carrier solar cell has proven challenging for two main reasons: hot carriers lose their energy very quickly, and they need to be extracted over distances of a few hundrednanometers via energy selective filters. LÄS MER

7. 20. Premixed Acidic Calcium Phosphate Cements

   Författare :Jonas Åberg; Håkan Engqvist; Helena Brisby; Peter Thomsen; Marc Bohner; Uppsala universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; monetite; brushite; bone void filler; injecatilbity; in vivo; in vitro;

   Sammanfattning : Calcium phosphate cements are used in medicine to fill bone defects or give support to screws and plates in fracture fixation. The cements are formed via mixing a powder with water and the mixture harden through a dissolution-precipitation reaction. LÄS MER