Sökning: "Seed energy"

Visar resultat 11 - 15 av 45 avhandlingar innehållade orden Seed energy.

  1. 11. Explorations of boron-based materials through theoretical simulations

    Författare :Adam Carlsson; Martin Dahlqvist; Johanna Rosén; Jakoah Brgoch; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Density Functional Theory; Thermodynamic Stability; Borides; Crystal Structure Prediction; Cluster Expansion; High-throughput;

    Sammanfattning : This thesis focuses on boron-based materials, notable for their structural complexity and unique combination of ceramic and metallic properties. These properties typically result in materials with high mechanical strength, electrical conductivity, and melting points. LÄS MER

  3. 12. Controlled growth of metastable Ta3N5 semiconducting films

    Författare :Jui-Che Chang; Ching-Lien Hsiao; Jens Birch; Grzegorz Greczynski; Martin Rudolph; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : The semiconductor tritantalum pentanitride (Ta3N5) is a promising material for green energy applications, specifically in the photoelectrolysis of water to produce oxygen and hydrogen. With a bandgap of approximately 2 eV, Ta3N5 is well-suited for efficient solar light absorption across a broad spectrum, and its band positions align favorably with the redox potential of water. LÄS MER

  4. 13. Dosimetry in brachytherapy : application of the Monte Carlo method to single source dosimetry and use of correlated sampling for accelerated dose calculations

    Författare :Håkan Hedtjärn; David Rogers; Linköpings universitet; []
    Nyckelord :MEDICINE; MEDICIN;

    Sammanfattning : Three issues related to brachytherapy dosimetry are addressed in this thesis. (1) The prospect of using Compton scattering to measure energy spectra from a high dose-rate (HDR) 192Ir source is discussed and a Compton spectrometer evaluated. LÄS MER

  5. 14. Growth, Physics, and Device Applications of InAs-based Nanowires

    Författare :Linus Fröberg; Fasta tillståndets fysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; field effect transistors; Low-dimensional structures; nanowires; chemical beam epitaxy; heterostructures; III-V; InP; InAs; quantum dots; gate all-around; wrap gate;

    Sammanfattning : This thesis is based on three different projects: 1) the epitaxial growth of nanowires using chemical beam epitaxy, 2) the study of electron transport through quantum dots and multiple quantum dots in nanowires at low temperature, and 3) the development of wrap gated nanowire field effect transistors. In the first part, a method of studying the diffusion of the source material on the substrate surface was developed. LÄS MER

  7. 15. Quasi-Phasematched nonlinear processes in KTiOPO4 isomorphs

    Författare :Anna Fragemann; KTH; []
    Nyckelord :nonlinear optics; optical parametric oscillator; optical parametric amplifier; KTiOPO4; RbTiOPO4; quasi-phasematched; electric field poling;

    Sammanfattning : This thesis explores the use of nonlinear crystals from theKTiOPO4(KTP) family with the aim to extend the possibleapplications for laser sources and to gain more knowledge aboutthe material’s benefits and limits. The work focussed onoptical parametric oscillators (OPOs) and optical parametricamplifiers (OPAs), which employ second order nonlinearprocesses. LÄS MER