Sökning: "photo books"

Visar resultat 16 - 20 av 405 avhandlingar innehållade orden photo books.

  1. 16. Flygbildstolkning av berghällar och blockmark : Metodstudier av tolkningsmöjligheter i olika flygbildsmaterial

    Författare :Leif Wastenson; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : .... LÄS MER

  3. 17. (Photo)electrochemical Water Oxidation: From Catalysis to Functional Device

    Författare :Hao Yang; Licheng Sun; Marc Koper; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; artificial photosynthesis; solar fuels; water oxidation; nucleophilic attack; conjugated microporous polymer; host-guest chemistry; photoanode; perovskites; artificiell fotosyntes; solbränslen; vattenoxidation; nukleofil attack; konjugerad mikroporös polymer; värd-gästkemi; fotoanoder; perovskiter; Kemi; Chemistry;

    Sammanfattning : The key challenge within artificial photosynthesis is achieving efficient electro- or photo-driven water oxidation catalysis, a necessary process to supply the protons for the reduction reactions, thereby enabling solar fuel production. To facilitate efficient water (photo)electrolysis for solar fuel production, this thesis focuses on two aspects: 1) elucidating the O-O bond formation mechanism and developing efficient, stable, and economical water oxidation catalysts (WOCs); 2) exploring stable, low-cost, light-absorbing photoanode materials that have suitable band structures and excellent charge diffusion properties. LÄS MER

  4. 18. Photo- and thermo-oxidation of polyethylene with enhanced degradability

    Författare :Farideh Khabbaz; KTH; []
    Nyckelord :;

    Sammanfattning : .... LÄS MER

  5. 19. Materials and Device Engineering for Efficient and Stable Polymer Solar Cells

    Författare :Rickard Hansson; Ellen Moons; Andreas Opitz; Rene Janssen; Karlstads universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; polymer solar cell; photovoltaics; morphology; photo-degradation; conjugated polymer; fullerene; synchroton-based techniques; hole transport layers; Physics; Fysik;

    Sammanfattning : Polymer solar cells form a promising technology for converting sunlight into electricity, and have reached record efficiencies over 10% and lifetimes of several years. The performance of polymer solar cells depends strongly on the distribution of electron donor and acceptor materials in the active layer. LÄS MER

  7. 20. Probing the effects of photodegradation of acceptor materials in polymer solar cells: bulk, surface, and molecular level

    Författare :Vanja Blazinic; Ellen Moons; Leif Ericsson; Thomas Wågberg; Karlstads universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; photovoltaics; polymer solar cell; conjugated polymers; fullerene; photo-oxidation; spectroscopy; Physics; Fysik;

    Sammanfattning : Polymer solar cells (PSC) have reached record power conversion efficiencies of over 15%. The operational lifetime of PSCs, however, has to increase for their use in large area outdoor applications. LÄS MER