Sökning: "Electron traps"

Visar resultat 1 - 5 av 6 uppsatser innehållade orden Electron traps.

  1. 1. Characterization of Cu-mineralized carbonate veins in the Alta-Kvænangen Tectonic Window, Norway

    Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurser

    Författare :Ellen Svens; [2024]
    Nyckelord :Greenstone belt; IOCG; Svecokarelian orogeny; Alta-Kvænangen Tectonic Window; Bergmark anticline;

    Sammanfattning : The Alta-Kvænangen Tectonic Window is part of a regional greenstone belt that formed around 2.3 Ga – 2.0 Ga. The Bergmark anticline in the area has gone through greenschist to amphibolite facies metamorphism and hosts Cu, Co and Au mineralizations in hydrothermal veins, albite felsite and chemical traps. LÄS MER

  3. 2. Organic Solar Cell Fabrication and Study on the Influence of Spin-dependent Processes on the Photocurrent using Spin-sensitive Techniques

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Fasta tillståndets fysik

    Författare :Ronja Olsmats Baumeister; Evelina Roxner; [2022]
    Nyckelord :EDMR; EPR; trEDMR; PEDOT:PSS; PCBM; P3HT; organic solar cells; osc; opv;

    Sammanfattning : Research in recent years on novel materials in organic solar cells (OSCs) have contributed to a rapid advancement in OSC efficiency. Here, OSCs with the well-studied organic semiconductors poly(3-hexylthiophene):[6,6]-phenyl C60-butyric acid methylester (P3HT:PCBM) in a bulk heterojunction structure were prepared to establish a baseline procedure for fabrication and spin-sensitive spectroscopy. LÄS MER

  4. 3. First principles DFT study of polyethylene insulation containing chemical impurities - implementing counterpoise correction

    Master-uppsats, KTH/Tillämpad fysik

    Författare :Max Pierre; [2022]
    Nyckelord :Applied physics; HVDC cable; Polymer physics; Polyethylene; Density functional theory; Molecular dynamics; CP2K; GROMAC; Electron traps; Band gaps; Density of states; Tillämpad fysik; HVDC kabel; Polymerfysik; Polyeten; Täthetsfunktionalteori; Molekulärdynamik; CP2K; GROMACS; Elektronfällor; Bandgap; Tillståndstäthet;

    Sammanfattning : Density functional theory (DFT) calculations of polyethylene (PE) HVDC cable insulation have been performed for systems containing four different chemical impurities: acetophenone, cumene, $\alpha$-methyl styrene and $\alpha$-cumyl alcohol. Systems were generated by molecular dynamics (MD) equilibration at four different temperatures relevant for cable insulation applications: 277 K, 293 K, 343 K and 363 K. LÄS MER

  5. 4. Mechanical properties of SiC nanowires with polytypes

    Master-uppsats, Lunds universitet/Fasta tillståndets fysik; Lunds universitet/Fysiska institutionen

    Författare :Anders Vesti; [2019]
    Nyckelord :atomistic modeling; nanowires; molecular dynamics; simulation; SiC; silicon carbide; fracture behavior; nanomechanics; Physics and Astronomy;

    Sammanfattning : In this report, we model the mechanical properties and fracture behavior of SiC nanowires with different polytypes using Molecular Dynamics (MD) simulations. The mechanical properties investigated are the Young’s modulus, the maximum tensile stress and the fracture strain. The three polytype tested are SiC (3C), (2H) and (4H). LÄS MER

  7. 5. Low-Frequency Noise in InGaAs Nanowire MOSFETs

    Master-uppsats, Lunds universitet/Fasta tillståndets fysik; Lunds universitet/Fysiska institutionen

    Författare :Christian Mario Möhle; [2017]
    Nyckelord :Physics and Astronomy;

    Sammanfattning : Low-frequency (LF) noise (1/f as well as random telegraph-signal (RTS) noise) measurements were performed on high-performance InGaAs nanowire (NW) metal-oxide-semiconductor field-effect transistors (MOSFETs). 1/f noise measurements at room temperature (RT) show that the dominant noise mechanism is carrier number fluctuations. LÄS MER