Search for dissertations about: "solar energy conversion"

Showing result 16 - 20 of 167 swedish dissertations containing the words solar energy conversion.

  2. 16. Atomic Scale Design of Clean Energy Materials : Efficient Solar Energy Conversion and Gas Sensing

    Author : Jawad Nisar; Rajeev Ahuja; Puru Jena; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Photocatalysts; Band gap narrowing; Water dissociation; Density functional theory; Gas sensing; Kaolinite; Physics with spec. in Atomic; Molecular and Condensed Matter Physics; Fysik med inriktning mot atom- molekyl- och kondenserande materiens fysik;

    Abstract : The focus of this doctoral thesis is the atomic level design of photocatalysts and gas sensing materials. The band gap narrowing in the metal oxides for the visible-light driven photocatalyst as well as the interaction of water and gas molecules on the reactive surfaces of metal oxides and the electronic structure of kaolinite has been studied by the state-of-art calculations. READ MORE

  4. 17. Combined Energy Solutions Applied to Dairy Farming in Bolivia and Latin America

    Author : Johnny Villarroel-Schneider; Andrew R. Martin; Anders Malmquist; Valentina Zaccaria; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Polygeneration; productive sector; dairy farm; farming; biogas; energy efficiency; electricity; refrigeration; self-sufficiency; techno-economic; GHG emissions; Bolivia; Latin America; Polygeneration; produktiv sektor; mjölkgård; jordbruk; biogas; energieffektivitet; elektricitet; kylning; självförsörjning; teknisk-ekonomisk; växthusgasutsläpp; Bolivia; Latinamerika; Poligeneración; sector productivo; granja; ganadería; biogás; eficiencia energética; electricidad; refrigeración; autosuficiencia; tecno-económico; GEI; Bolivia; América Latina; Energiteknik; Energy Technology;

    Abstract : The transition towards a sustainable world requires immediate action on the part of individuals and communities. Developing countries find the task of incorporating climate change policies difficult for various reasons including the negative effects that the Covid-19 pandemic left behind on the economy. READ MORE

  5. 18. Exploring Electron Transfer Dynamics of Novel Dye Sensitized Photocathodes : Towards Solar Cells and Solar Fuels

    Author : Lei Zhang; Leif Hammarström; Yiying Wu; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Electron transfer; Laser spectroscopy; Femtosecond spectroscopy; Transient absorption; NiO; DSSCs; DSSFDs; Charge separation; Solar energy conversion; Nanosecond photolysis; Photophysics; Kemi med inriktning mot kemisk fysik; Chemistry with specialization in Chemical Physics;

    Abstract : The design of dyes for NiO-based dye-sensitized solar cells (DSSCs) has drawn attention owing to their potential applications in photocatalysis and because they are indispensable for the development of tandem dye-sensitized solar cells. The understanding of the electron transfer mechanisms and dynamics is beneficial to guide further dye design and further improve the performance of photocathode in solar cells and solar fuel devices. READ MORE

  6. 19. Energy Transfer and Conversion in the Magnetosphere-Ionosphere System

    Author : Lisa Rosenqvist; Stephan Buchert; Andris Vaivads; Mike Lockwood; Uppsala universitet; []
    Keywords : Space and plasma physics; solar system; space physics; magnetospheric physics; plasma physics; magnetic storms; substorms; boundary layers; magnetic reconnection; energy conversion; space weather; Rymd- och plasmafysik;

    Abstract : Magnetized planets, such as Earth, are strongly influenced by the solar wind. The Sun is very dynamic, releasing varying amounts of energy, resulting in a fluctuating energy and momentum exchange between the solar wind and planetary magnetospheres. READ MORE

  7. 20. Molecular Approaches to Photochemical Solar Energy Conversion : Towards Synthetic Catalysts for Water Oxidation and Proton Reduction

    Author : Gerriet Eilers; Reiner Lomoth; Leif Hammarström; Wolfgang Lubitz; Uppsala universitet; []
    Keywords : Physical chemistry; artificial photosynthesis; solar fuel; WOC; OEC; accumulative electron transfer; hydrogenase mimic; oxygen evolution; proton reduction; water oxidation; Fysikalisk kemi;

    Abstract : A molecular system capable of photoinduced water splitting is an attractive approach to solar energy conversion. This thesis deals with the functional characterization of molecular building blocks for the three principal functions of such a molecular system: Photoinduced accumulative charge separation, catalytic water oxidation, and catalytic proton reduction. READ MORE