Sökning: "Conjugated polymers"

Visar resultat 1 - 5 av 18 uppsatser innehållade orden Conjugated polymers.

  1. 1. Synthesis of a polar conjugated polythiophene for 3D-printing of complex coacervates

    Master-uppsats, Linköpings universitet/Laboratoriet för organisk elektronik; Linköpings universitet/Tekniska fakulteten

    Författare :Johanna Heimonen; [2021]
    Nyckelord :conjugated polymers; polythiophene; crosslinking; Suzuki polymerization; OMIEC; complex coacervate; water soluble polymer; Kemi; Kemi;

    Sammanfattning : The aim of this thesis was to synthesize a functionalized polar conjugated polythiophene that could be (3D-) printed into form-stable structures for bio-interfacing. The material design rationale aimed for a water-processable polymer that had the capability of electronic and ionic conduction, by using a thiophene backbone and oligoethylene side chains. LÄS MER

  3. 2. A photodegradation study of conjugated polymers for organic solar cells by absorption spectroscopy and atomic force microscopy

    Uppsats för yrkesexamina på avancerad nivå, Karlstads universitet/Institutionen för ingenjörsvetenskap och fysik (from 2013)

    Författare :Johansson André; [2021]
    Nyckelord :OSC; solar cells; active layer; polymer; degradation;

    Sammanfattning : The effect of light exposure in ambient air on thin films made from an electron acceptor polymer poly{[N,N'-bis(2-octyldodecyl)naphthalene-1,4,5,8-bis(dicarboximide)-2,6-diyl]-alt-5,5'-(2,2'-bithiophene)} (N2200), an electron donor polymer Poly[[2,3-bis(3-octyloxyphenyl)-5,8-quinoxalinediyl]-2,5-thiophenediyl] (TQ1) and their blends, has been studied using UV-vis spectroscopy and Atomic Force Microscopy (AFM). For solutions of TQ1, N2200 and blends, the linearity of the Beer-Lambert law for absorption spectroscopy has been verified. LÄS MER

  4. 3. Passivation of Gallium Arsenide Nanowires for Solar Cells

    Master-uppsats, Lunds universitet/Fasta tillståndets fysik; Lunds universitet/Fysiska institutionen

    Författare :Austin Irish; [2019]
    Nyckelord :nanowires; semiconductors; solar cells; photovoltaics; passivation; electronics; chemistry; polymers; hydrazine; plasma; gallium; arsenic; iii-v; epitaxy; photoluminescence; time-resolved; spectroscopy; Physics and Astronomy;

    Sammanfattning : A strategic and diverse set of passivation methods for gallium arsenide nanowires wasstudied. Using a time-resolved photoluminescence setup at100 Kand300 K, the radiativerecombination of charge carriers was resolved on a picosecond time scale. LÄS MER

  5. 4. Probing ion movement in conjugated polymers

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Strukturkemi

    Författare :Markus Hall; [2019]
    Nyckelord :Light-emitting electrochemical cell; conjugated polymer; electrochemical doping; MEH-PPV; lithium; trifluoromethanesulfonate; trimethylolpropane ethoxylate;

    Sammanfattning : Electronic conduction in conjugated polymers can be increased through electrochemical doping. This is utilised in light-emitting electrochemical cells and allows for a less demanding manufacturing process compared to the related organic light-emitting diode. LÄS MER

  7. 5. Phenolic compounds in Fagopyrum sp. grains (buckwheat) : profile, bioactivity and effect of processing

    Kandidat-uppsats, SLU/Department of Molecular Sciences

    Författare :Agnes Wahlsten; [2019]
    Nyckelord :Buckwheat; Fagopyrum esculentum; Fagopyrum tartari- cum; rutin; quercetin; total phenolic content; gluten-free; functional foods; antioxidants;

    Sammanfattning : This study aimed to investigate the health benefits related to chemical com-pounds found in buckwheat cultivars. Factors influencing the presence of bioactive compounds with assumed health effects were examined. Two spe-cies of buckwheat, Fagopyrum esculentum (common buckwheat) and Fag-opyrum Tartaricum (tartary buckwheat) were evaluated. LÄS MER