Search for dissertations about: "thesis perylene dyes"

Found 4 swedish dissertations containing the words thesis perylene dyes.

  1. 1. Characterisation of Organic Dyes for Solid State Dye-Sensitized Solar Cells

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Ute Cappel; Anders Hagfeldt; Gerrit Boschloo; Udo Bach; [2011]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; energy alignment; hole conductor; injection; interface; perylene; photo-induced absorption; regeneration; spectroelectrochemistry; spiro-MeOTAD; Stark effect; titanium dioxide; NATURAL SCIENCES Chemistry Physical chemistry; NATURVETENSKAP Kemi Fysikalisk kemi; Physical Chemistry; Fysikalisk kemi;

    Abstract : Energy from the sun can be converted to low cost electricity using dye-sensitized solar cells (DSCs). Dye molecules adsorbed to the surface of mesoporous TiO2 absorb light and inject electrons into the semiconductor. READ MORE

  2. 2. Quantum Chemical Modeling of Dye-Sensitized Titanium Dioxide Ruthenium Polypyridyl and Perylene Dyes, TiO2 Nanoparticles, and Their Interfaces

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Maria J. Lundqvist; Sten Lunell; Petter Persson; Lars Ojamäe; [2006]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Quantum chemistry; density functional theory; chromophore; nanocrystal; interface; photoexcitation; triplet state; surface electron transfer; electronic coupling strength; Kvantkemi; NATURAL SCIENCES Chemistry Theoretical chemistry Quantum chemistry; NATURVETENSKAP Kemi Teoretisk kemi Kvantkemi;

    Abstract : Quantum chemical calculations have been used to model dye-sensitized nanostructured titanium dioxide systems that can be used in solar cells for solar energy to electricity conversion. Structural, electronic and spectral properties of isolated dyes and both bare and dye-sensitized TiO2 have been calculated with density functional theory, providing detailed information about both the separate parts and the dye-TiO2 interface. READ MORE

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

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Jens Föhlinger; Leif Hammarström; Davidsson Jan; Benjamin Dietzek; [2018]
    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. 4. Computational Investigation of Dye-Sensitized Solar Cells

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Mattias Nilsing; Uppsala universitet.; [2007]
    Keywords : Quantum chemistry; titanium dioxide; anatase; rutile; pyridine; perylene; nanostructured; interface; electronic coupling; electron injection; quantum chemistry; phosphonic acid; Kvantkemi;

    Abstract : Interfaces between semiconductors and adsorbed molecules form a central area of research in surface science, occurring in many different contexts. One such application is the so-called Dye-Sensitized Solar Cell (DSSC) where the nanostructured dye-semiconductor interface is of special interest, as this is where the most important ultrafast electron transfer process takes place. READ MORE