Sökning: "Charge-separated state"

Visar resultat 11 - 15 av 21 avhandlingar innehållade orden Charge-separated state.

1. 11. Multi-functional Chromophores

   Författare :Fredrik Johansson; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : As the push towards green energy become stronger, more efficient systems needs to be developed to compete with fossil fuel based systems. In modern Grätzel solar cells, most of the energy losses are inherited from the choice of chromophore and metal oxide surface. LÄS MER

3. 12. Ruthenium(II) Polypyridyl Complexes in Supramolecular Systems relevant to Artificial Photosynthesis

   Författare :Henriette Wolpher; Björn Åkermark; Licheng Sun; Johannes Vos; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Ruthenium complexes; Organic chemistry; Organisk kemi;

   Sammanfattning : This thesis describes the synthesis and properties of ruthenium complexes relevant to artificial photosynthesis. The work includes preparation of RuIIpolypyridine complexes as well as multi component systems where RuII(bpy)3 or RuII(tpy)2 type complexes are used as photosesnsitizers. LÄS MER

4. 13. Electron and Energy Transfer in Supramolecular Complexes Designed for Artificial Photosynthesis

   Författare :Helena Berglund Baudin; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics; artificial photosynthesis; electron transfer; energy transfer; ruthenium; manganese; Fysik; Physics; Fysik; Physical Chemistry; fysikalisk kemi;

   Sammanfattning : In the society of today the need for alternative energy sources is increasing. The construction of artificial devices for the conversion of sunlight into electricity or fuel seems very attractive from an environmental point of view, since these devices are based on processes that does not necessarily generate any harmful biproducts. LÄS MER

5. 14. Ruthenium(II) Polypyridyl Complexes : Applications in Artificial Photosynthesis

   Författare :Olof Johansson; Licheng Sun; Björn Åkermark; Michael D Ward; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Organisk kemi; Chemistry; Kemi;

   Sammanfattning : Molecular mimics of PS II, which consist of a photosensitizer linked to electron acceptors/donors, are attractive candidates for the conversion of solar energy into chemical energy. Several different classes of sensitizers have been studied and among these, ruthenium(II) polypyridyl complexes continue to attract major attention. LÄS MER

7. 15. Studies of Charge Separation in Molecular and Molecular-Inorganic Materials Assemblies for Solar Energy Conversion

   Författare :Valeria Saavedra; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; water oxidation; charge-separation; photoinduced electron transfer; solar fuel; dye-sensitized;

   Sammanfattning : Conversion of solar energy and its storage in the form of chemical bonds is a current scientific and technological challenge. Different approaches to achieve light-harvesting followed by efficient charge separation are the focus on this thesis. LÄS MER