Search for dissertations about: "photoanodes"

Found 5 swedish dissertations containing the word photoanodes.

2. 1. Surface Engineering of BiVO4-based Photoelectrochemical Cells for Water Splitting

   Author : Qijun Meng; Licheng Sun; Jae Sung Lee; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; photoelectrochemical water splitting; photoanodes; bismuth vanadate; surface engineering; Kemi; Chemistry;

   Abstract : Photoelectrochemical (PEC) water splitting is a promising technology for converting solar energy into green hydrogen. The development of highly efficient, robust and cost-effective photoanodes has been established to be of essential importance for PEC water oxidation. READ MORE

4. 2. Nanoplasmonic Enhancement of Photon-to-Electron Conversion in Functionalized Iron Oxide Photoanodes

   Author : Beniamino Iandolo; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Photon-to-Electron Conversion; Hydrogen; Near-field Enhancement; Iron Oxide; Nanoparticles; Localized Plasmons; Water Splitting;

   Abstract : The ever increasing energy demand of modern society clashes with the accelerating depletion of the fossil fuels from which most of this energy is taken today. Moreover, fossil fuels consumption poses a severe threat on the Earth’s environment and climate through global warming. READ MORE

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

   Author : Hao Yang; Licheng Sun; Marc Koper; KTH; []
   Keywords : 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;

   Abstract : 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. READ MORE

6. 4. Non-Coherent Photon Upconversion on Dye-Sensitized Nanostructured ZrO2 Films for Efficient Solar Light Harvesting

   Author : Jonas Sandby Lissau; Ana Morandeira; James M. Gardner; Leif Hammarström; Josef Michl; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; photon upconversion; triplet-triplet annihilation; DSSC; dye-sensitized; delayed fluorescence; photophysics; solar energy conversion; nanostructured surface; energy migration; Kemi med inriktning mot kemisk fysik; Chemistry with specialization in Chemical Physics;

   Abstract : Photon upconversion by sensitized triplet–triplet annihilation (UC-STTA) is a photophysical process that facilitates the conversion of two low-energy photons into a single high-energy photon. A low-energy photon is absorbed by a sensitizer molecule that produces a triplet excited state which is transferred to an emitter molecule. READ MORE

7. 5. Discovering Hidden Traps : in Nickel Oxide Nanoparticles for Dye-Sensitised Photocathodes

   Author : Luca D'Amario; Leif Hammarström; James Durrant; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES;

   Abstract : The finite nature of fossil fuels and their effect on the global climate, raised the need to find an alternative source of energy. This source should be environment compatible, cheap and abundant. The light coming from the Sun is a promising alternative. READ MORE