Sökning: "transient absorption spectroscopy"

Hittade 3 uppsatser innehållade orden transient absorption spectroscopy.

  1. 1. Microscopic and Macroscopic Samples of Atoms in Superposition States Studied by Attosecond Pulses

    Magister-uppsats, Lunds universitet/Matematisk fysik; Lunds universitet/Fysiska institutionen

    Författare :Axel Stenquist; [2021]
    Nyckelord :Mathematical physics; Theoretical physics; Atomic physics; Attosecond physics; Ultra-fast physics; Numerical simulations; Microscopic; Mesoscopic; Macroscopic; Superposition; Light matter interaction; Quantum mechanics; Electromagnetism; Semiclassical; Attosecond transient absorption spectroscopy; ATAS; Förster resonance; FRET; Two-atom model; Inter-atomic interaction; Dipole-dipole interaction; Many-atom model; Collective coherent effects; Time-dependent configuration-interaction singles; TDCIS; Physics and Astronomy;

    Sammanfattning : In the present thesis, the interaction between atoms in superposition states and attosecond pulses is studied from the microscopic to the macroscopic regime. Using a semi-classical framework, three different models have been explored in order to investigate attosecond light--matter interaction processes. LÄS MER

  2. 2. Iron-Based Dye-Sensitized Solar Cells - From Theory to Working Solar Cell

    Master-uppsats, Lunds universitet/Centrum för analys och syntes

    Författare :Linnea Lindh; [2019]
    Nyckelord :Dye-sensitized solar cells; Grätzel cells; solar cells of the future; solar cells of tomorrow; spectroscopy; time-resolved spectroscopy; materials chemistry; materialkemi; Chemistry;

    Sammanfattning : In the hunt for fossile-free energy-harvesting techniques, solar cells constitute one of the most promising techniques. Today, silicon-based solar cells are the dominant technique on the market but even the Silicon solar cell has limitations which means that there is a motivation for developing new solutions. LÄS MER

  3. 3. Interligand Electron Transfer Dynamics in Ruthenium Polypyridyl Complexes for Dye Sensitized Solar Cells Determined with Femtosecond Transient IR Absorption Anisotropy

    Master-uppsats, Uppsala universitet/Fysikalisk kemi

    Författare :Belinda Pettersson Rimgard; [2016]
    Nyckelord :Interligand electron transfer; dye sensitized solar cell; ruthenium; N3; N712; transient absorption spectroscopy; ultrafast spectroscopy; anisotropy;

    Sammanfattning : Interligand electron transfer (ILET) may be an essential parameter for the injection ofan electron from the dye into the semiconductor surface of a dye sensitized solar cell(DSSC). Without an efficient injection, competing recombination paths may become apparent. LÄS MER