Search for dissertations about: "carbazole"

Showing result 1 - 5 of 17 swedish dissertations containing the word carbazole.

  2. 1. Organic Hole-Transport Materials for Perovskite Solar Cells

    Author : Linqin Wang; Licheng Sun; Nam-Gyu Park; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Hole-transport material; Photovoltaic device; Perovskite solar cell; Dopant-free; Carbazole; Spiro[fluorene-9; 9 -xanthene]; Small organic molecule; Crosslinked polymer; Solution-processed.; Kemi; Chemistry;

    Abstract : Research on perovskite solar cells (PSCs) has undergone dramatic development since the first cells were reported in 2009, and the past decade has witnessed a significant breakthrough on their power conversion efficiencies (PCEs) from 3.8% to 25%. READ MORE

  4. 2. Dynamics of Excitation Transfer and Charge Separation in Polymeric Semiconductors

    Author : Arvydas Ruseckas; Kemisk fysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Anisotropy; Photoinduced absorption; Femtosecond spectroscopy; Polythiophene; Conjugated polymers; Donor-Acceptor Complexes; Carbazole; Charge separation; Excitation transfer; Recombination; Physics; Fysik;

    Abstract : Dynamics of optically excited electronic states have been studied in solid films and solutions of semiconducting polymers and model compounds. Transient absorption, monitored in the spectral range from 0.9 eV to 2.5 eV with a time resolution of about 100 fs, was the main experimental technique. READ MORE

  5. 3. Direct and indirect mechanisms for aryl hydrocarbon receptor activation mediated by 6-formylindolo[3,2-b]carbazole

    Author : Emma Wincent; Ulf Rannug; Agneta Rannug; Christopher Bradfield; Stockholms universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Toxicology; Toxikologi; toxikologisk genetik; Genetic Toxicology;

    Abstract : The aryl hydrocarbon receptor (AhR) is mostly recognized for mediating the adverse effects of dioxins. In addition, endogenous activation of the AhR seems to have important biological functions.  Several studies have demonstrated an activation of the receptor when no exogenous ligand was added. READ MORE

  6. 4. Formation and metabolism of the tryptophan-derived 6-formylindolo[3,2-b]carbazole - a light-induced Ah-receptor ligand

    Author : Linda Bergander; Ulf Rannug; Agneta Rannug; Stockholms universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Toxicology; Toxikologi;

    Abstract : The aryl hydrocarbon receptor (AhR) is a ligand dependent transcription factor ubiquitously expressed in mammalian cells. It is a genetically ancient protein mostly known for binding the extremely toxic contaminant 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD). READ MORE

  7. 5. Synthesis of indoles, bisindoles and indolocarbazoles : high affinity aryl hydrocarbon receptor ligands

    Author : Niklas Wahlström; Karolinska Institutet; Karolinska Institutet; []
    Keywords : Indole; bisindoles; carbazole; indolocarbazole; indolo[3; 2-b]carbazole; ICZ; FICZ; alkaloid; metabolite; tropolone; caulersin; aryl hydrocarbon receptor; Ali receptor; X-ray crystallography; Lewis acid; acylation; Vilsmeier reaction.;

    Abstract : This thesis deals with the synthesis and reactions of indoles, bisindoles, indolocarbazoles and their derivatives. New methods for ring formation of planar, heterocyclic quinones, with the indolo[3,2b]carbazole or indolo[2,3-b]carbazole structures are described. READ MORE