Sökning: "dye-sensitized semiconductors"

Visar resultat 1 - 5 av 10 avhandlingar innehållade orden dye-sensitized semiconductors.

1. 1. Computational Investigation of Dye-Sensitized Solar Cells

   Författare :Mattias Nilsing; Sten Lunell; Lars Ojamäe; Petter Persson; Sven Stafström; Uppsala universitet; []
   Nyckelord :Quantum chemistry; titanium dioxide; anatase; rutile; pyridine; perylene; nanostructured; interface; electronic coupling; electron injection; quantum chemistry; phosphonic acid; Kvantkemi;

   Sammanfattning : Interfaces between semiconductors and adsorbed molecules form a central area of research in surface science, occurring in many different contexts. One such application is the so-called Dye-Sensitized Solar Cell (DSSC) where the nanostructured dye-semiconductor interface is of special interest, as this is where the most important ultrafast electron transfer process takes place. LÄS MER

3. 2. Studies of Semiconductors Modified with Nanoscale Light Absorbers for Solar Cell Application

   Författare :Boriss Mahrov; Hans Siegbahn; Anders Hagfeldt; Håkan Rensmo; Gerrit Boschloo; Gary Hodes; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics; photoelectron spectroscopy; dye-sensitized; solar cells; inorganic light absorber; nanostructure; mesoporous; photovoltaic devices; Fysik; Physics; Fysik;

   Sammanfattning : Recently, materials such as hole conductors (CuI, CuSCN) and light absorbers (Ru-complexes, CuInS2) have been actively investigated for application in nanocrystalline solar cells. In this thesis combinations of these materials have been studied. LÄS MER

4. 3. Towards Conduction Band Mediated Multi-electron Transfer: Spectroscopic Studies of Photosensitizer-semiconductor-acceptor Assemblies

   Författare :Elin Sundin; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Solar fuels; charge separation; dye-sensitized; semiconductor thin films; electron transfer;

   Sammanfattning : Converting solar energy into a storable form in chemical bonds, i.e., generating solar fuels, is a promising strategy for producing renewable fuels. This however comes with several challenges that need to be solved before generation of solar fuels can become a reality. LÄS MER

5. 4. Extending Photoinduced Charge Separation. Molecular-semiconductor assemblies for solar energy conversion

   Författare :Valeria Saavedra; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Artificial photosynthesis; Back-electron transfer; Ruthenium complexes.; Dye-sensitized; Charge recombination; Charge separation; Conduction band mediated;

   Sammanfattning : The conversion of solar energy into chemical energy by harvesting visible-light with synthetic molecules presents several scientific and technological challenges. This thesis is dedicated to the investigation of approaches to long-lived charge separation, one of the crucial aspects for the photochemical generation of solar fuels. LÄS MER

7. 5. Photoinduced Processes in Molecular-Inorganic Materials - Design Strategies for Control of Photophysical and Photochemical Processes

   Författare :Elin Sundin; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Photochemistry; hybrid materials; solar energy conversion; charge separation; electron transfer; singlet fission; dye-sensitized semiconductors; mechanistic studies;

   Sammanfattning : Sunlight is the most abundant renewable energy resource on Earth and has the potential to provide our society with clean energy. Despite this abundancy, solar energy corresponds to only a minority of the global energy production. Two major reasons for this are the limited efficiencies of solar cells and the difficulty of storing solar energy. LÄS MER