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Showing result 1 - 5 of 302 swedish dissertations matching the above criteria.

2. 1. Synthesis of Organic Chromophores for Dye Sensitized Solar Cells

   Author : Daniel Hagberg; Licheng Sun; Elena Galoppini; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Acceptor; chromophore; donor; dye sensitized solar cells; HOMO and LUMO energy level tuning; linker; organic dye.; Chemical engineering; Kemiteknik;

   Abstract :   This thesis deals with development and synthesis of organic chromophores for dye sensitized solar cells. The chromophores are divided into three components; donor, linker and acceptor. The development of efficient organic chromophores for dye sensitized solar cells starts off with one new organic chromophore, D5. READ MORE

4. 2. The Fate of Electronically Excited States : Ultrafast Electron and Energy Transfer in Solvated Donor-Acceptor Systems

   Author : Staffan Wallin; Leif Hammarström; Jan Davidsson; Eric Vauthey; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physical chemistry; Electron transfer; Energy transfer; Anisotropy; Porphyrin; Ruthenium tris-bipyridine; Superexchange; Supramolecular; Donor-Acceptor; Charge transfer state; S2 state; Ultrafast; Fysikalisk kemi; Physical chemistry; Fysikalisk kemi;

   Abstract : Processes where a molecule absorbs visible light and then disposes of the excess energy via electron/energy transfer reactions have an important role both in nature (e.g. in photosynthesis) and in many technical applications (e.g. READ MORE

5. 3. Proton conductivity of lanthanum and barium zirconate: Microscale aspects on first-principles basis

   Author : Joakim Nyman; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; first principles; trapping; conductivity; grain boundary; segregation; pyrochlore; space charge; solid oxide fuel cell; depletion; electrolyte; La2Zr2O7; oxygen vacancy; BaZrO3; proton; DFT; point defect; perovskite; acceptor;

   Abstract : Fuel cells are devices which convert chemical energy into electrical energy cleanly and efficiently. Development of fuel cells compatible with hydrocarbon fuels would make more efficient use of present fossil and renewable fuels, and also enable progress towards a future hydrogen economy. READ MORE

6. 4. Design, Synthesis and Properties of Organic Sensitizers for Dye Sensitized Solar Cells

   Author : Karl Martin Karlsson; Licheng Sun; Jaejung Ko; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Acceptor; chromophore; donor; dye; sensitized; energy level; HOMO LUMO; linker; phenoxazine; sensitizer; solar cell; triphenylamine; Chemistry; Kemi; Organic synthesis; Organisk syntes;

   Abstract : This thesis gives a detailed description of the design and synthesis of new organic sensitizers for Dye sensitized Solar Cells (DSCs). It is divided in 7 chapters, where the first gives an introduction to the field of DSCs and the synthesis of organic sensitizers. READ MORE

7. 5. Intramolecular processes in porphyrin-based donor-bridge-acceptor systems

   Author : Karin Pettersson; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Donor-bridge-acceptor system; paramagnetic species; spectroscopy; porphyrin; super-exchange electron transfer; sequential electron transfer;

   Abstract : .... READ MORE