Sökning: "low band-gap conjugated polymers"

Visar resultat 1 - 5 av 13 avhandlingar innehållade orden low band-gap conjugated polymers.

  1. 1. Low Band-Gap Conjugated Polymers for Plastic Solar Cells

    Författare :Erik Per Perzon; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; low band-gap conjugated polymers; Plastic solar cells;

    Sammanfattning : Today, fossil fuels like coal, oil, and natural gas are used for more than 60% of the world's electricity production. These fuels have a very negative impact on the environment and many researchers agree that the earth's climate is changing as a consequence of fossil fuel emissions. LÄS MER

  3. 2. Optical modelling of conjugated polymers : from materials to devices

    Författare :Nils-Krister Persson; Andy Monkman; Linköpings universitet; []
    Nyckelord :Spectroscopic ellipsomctry; optical modelling; organic solar cell; conjugated polymer; polyfluorene; polythiophene; copolymer; fullerene blend; photovoltaic device; dielectric function; NATURAL SCIENCES; NATURVETENSKAP;

    Sammanfattning : Measurements and modelling of theoretical properties of polymer-based photovoltaic devices, PPVDs, are the subjects of this thesis. Modelling refers both to modelling of materials, based on extraction of the dielectric function, and to modelling of devices by computer simulation of the optical electrical field inside PPVDs. LÄS MER

  4. 3. Synthesis and Properties of Conjugated Polymers for Photonic Devices

    Författare :Mattias Svensson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; conjugated polymers; polyfluorenes; light-emitting diodes; solar cells; photoluminescence; electroluminescence; polythiophenes;

    Sammanfattning : The synthesis and properties of new conjugated polymers for photonic devices, such as light-emitting diodes and solar cells is dealt with here. Much work was devoted to increasing the efficiencies of the devices by controlling the properties in thin films of the polymers. LÄS MER

  5. 4. Conjugated Luminescent Molecular Materials : An Experimental and Theoretical Study of Electronic, Optical and Chemical Properties of some Conjugated Molecules, Polymers and Interfaces

    Författare :Nicklas Johansson; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : In recent years intensive studies of conjugated polymers and molecules have been carried out all over the world. The most promising use for these materials appears at the moment to be as the active luminescent component in flat panel displays. LÄS MER

  7. 5. Computational Predictions of Conjugated Polymer Properties for Photovoltaic Applications

    Författare :Svante Hedström; Beräkningskemi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Conjugated polymers; density functional theory; organic photovoltaics; light-harvesting capabilities; quantum chemistry; absorption spectra; electronic structure; computational predictions;

    Sammanfattning : Organic solar cells employing fullerenes blended with conjugated polymers as the main light-absorbing material have achieved power conversion efficiencies exceeding 10%. They hold promise as an alternative energy source with many advantages in terms of long-term sustainability and reduced greenhouse gas emissions. LÄS MER