Search for dissertations about: "transient absorption-spectroscopy"

Showing result 1 - 5 of 24 swedish dissertations containing the words transient absorption-spectroscopy.

  2. 1. Shining Light on Molecules : Electron Transfer Processes in Model Systems for Solar Energy Conversion Investigated by Transient Absorption Spectroscopy

    Author : Jens Föhlinger; Leif Hammarström; Davidsson Jan; Benjamin Dietzek; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; photophysics; photoinduced electron transfer; transient absorption spectroscopy; laser spectroscopy; solar energy conversion; p-type DSSCs; Charge separation; recombination; mesoporous NiO;

    Abstract : In the recent years, solar energy conversion has attracted a huge research interest due to the potential application for limiting the greenhouse effect. In many solar cells and solar fuel cells, understanding of charge transfer (CT) and recombination is important for future improvement of the overall efficiency. READ MORE

  4. 2. Hole Transport Materials for Solid-State Mesoscopic Solar Cells

    Author : Lei Yang; Anders Hagfeldt; Erik Johansson; Gerrit Boschloo; Fengling Zhang; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; mesoscopic solar cells; solid-state dye-sensitized solar cells; organometallic halide perovskite; hole transport materials; mesoporous TiO2; conjugated polymer; sensitizer; transient absorption spectroscopy; photo-induced absorption spectroscopy; in-situ photoelectrochemical polymerization; spiro-OMeTAD; P3HT; TPAA; MeO-TPD; bis-EDOT; DEH; Li ion migration; charge recombination; electron lifetime;

    Abstract : The solid-state mesoscopic solar cells (sMSCs) have been developed as a promising alternative technology to the conventional photovoltaics. However, the device performance suffers from the low hole-mobilities and the incomplete pore filling of the hole transport materials (HTMs) into the mesoporous electrodes. READ MORE

  5. 3. Energy migration and charge formation in conjugated polymers

    Author : Yuri Zaushitsyn; Kemisk fysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; magnetic resonance; relaxation; spectroscopy; Kondenserade materiens egenskaper:elektronstruktur; egenskaper elektriska; magnetiska och optiska ; supraledare; magnetisk resonans; spektroskopi; supraconductors; magnetic and optical properties; electrical; energy transfer; Physics; Fysik; Condensed matter:electronic structure; transient absorption spectroscopy; conjugated polymer; charge photogeneration;

    Abstract : The main part of the thesis is concerned with charge photogeneration in conjugated polymers. MeLPPP and POMeOPT films were investigated by transient absorption spectroscopy using different excitation photon energies and light intensities with and without an external electric field. READ MORE

  6. 4. Singlet Fission and Exciton Coupling Design Principles for Efficient Photon Harvesting

    Author : Rasmus Ringström; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; exciton coupling; electron transfer; Singlet fission; transient absorption spectroscopy;

    Abstract : Extensive research efforts have been dedicated to unravelling the diverse array of processes triggered by the interaction of light with matter. Harnessing and comprehending some of these phenomena holds immense potential in humanity's transition towards renewable energy sources. READ MORE

  7. 5. Attosecond Sources and Interferometers - Developments and Applications

    Author : Esben Witting Larsen; Atomfysik; []
    Keywords : High-order harmonic generation; Free induction decay; Transient absorption spectroscopy; Electron spectroscopy; Attosecond interferometry; Fysicumarkivet A:2016:Larsen;

    Abstract : .... READ MORE