Sökning: "Conjugated polymers"

Visar resultat 6 - 10 av 129 avhandlingar innehållade orden Conjugated polymers.

  1. 6. Conjugated polyelectrolytes : conformation sensitive optical probes for the recording of biological processes

    Författare :Peter Nilsson; Guillermo C. Bazan; Linköpings universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP;

    Sammanfattning : The physical properties of conjugated polymers can be utilized for a wide range of biosensors. For instance, the conformational flexibility fouud in conjugated polyelectrolytes, allows direct connection between the geometry of chains and the resulting electronic structure and optical processes, since the extension of the π-conjugated system is distorted by conformational changes of the polyelectrolyte backbone. LÄS MER

  3. 7. Electroactivity of conjugated polymers : A study of electrochemical doping and its applications

    Författare :Tomas Johansson; Carita Kvarnström; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Electrochemical doping of conjugated polymers is a complex process, which forms the basis for both characterisation and applications of this class of materials. The high electron affinityof poly(quinoxaline vinylene)s and poly(pyridopyrazine)s, two types of polymers with potential use as electron acceptors in organic photodiodes, has been demonstrated with cyclic voltamrnetry. LÄS MER

  4. 8. 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

  5. 9. Design, Synthesis and Characterization of Conjugated Polymers for Photovoltaics and Electrochromics

    Författare :Kim Bini; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; organic electronics; conjugated polymers; electrochromic polymers; polymer solar cells; all-polymer solar cells; side chain engineering;

    Sammanfattning : With the invention of organic electronics, a new class of materials needed to be explored and suitable applications found. The use as semiconductors in many different devices has been explored, where photovoltaics, light-emitting diodes and field-effect transistors have been prominent. LÄS MER

  7. 10. Chemical Doping of Conjugated Polymers for Thermoelectric Applications

    Författare :Mariavittoria Craighero; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; mechanical properties; conjugated polymers; solid-state order; organic thermoelectrics; chemical doping;

    Sammanfattning : The ongoing development of interconnected and wearable small devices, which together make up the so-called Internet of Things, is driving a rising need for autonomous and on-site energy supplies. Heat, an abundant and often wasted energy source, can be harnessed through thermoelectric generators that can directly convert heat into electricity. LÄS MER