Search for dissertations about: "perovskite"

Showing result 1 - 5 of 81 swedish dissertations containing the word perovskite.

  1. 1. Photophysics of Perovskite Nano- and Microcrystals

    University dissertation from Lund University, Faculty of Science, Department of Chemistry, Division of Chemical Physics

    Author : Junsheng Chen; Lunds universitet.; Lund University.; Lunds universitet.; Lund University.; [2018-02]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Ultrafast spectroscopy; Two-photon absorption; Perovskite; Nanocrystals; Photostability; Lead free perovskite;

    Abstract : Varje år ökar världens energiförbrukning på grund av befolkningstillväxt och ökande levnadsstandard. Vi står inför många stora problem, till exempel klimatförändringar, uttömning av fossila energikällor (t. ex. petroleum, kol och naturgas) och miljöföroreningar. READ MORE

  2. 2. Acceptor-Doped BaZrO3 Perovskite: Synthesis, Structure and Proton Conductivity

    University dissertation from Lund University, Faculty of Science, Department of Chemistry, Division of Chemical Physics

    Author : Istaq Ahmed; [2008]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Impedance spectroscopy; Perovskite; Neutron diffraction; Rietveld refinement; BaZrO3.; Proton conductor;

    Abstract : Acceptor-doped perovskite oxides exhibit significant proton conductivity in hydrogen containing atmospheres. Therefore, they have potential for use as separator materials for various electrochemical devices including gas sensors, electrolysers and fuel cells. READ MORE

  3. 3. Properties in New Complex Perovskite-Related Materials, a Matter of Composition and Structure

    University dissertation from Stockholm : Department of Materials and Environmental Chemistry, Stockholm University

    Author : Samrand Shafeie; Stockholms universitet.; [2013]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Perovskite; XANES; XRPD; NPD; TEC; TEM; SEM; TGA; SAED; HREM; thermal expansion; Seebeck coefficient; electronic conductivity; SOFC materials; magnetic susceptibility; Perovskit; XANES; XRPD; NPD; TEC; TEM; SEM; TGA; SAED; HREM; termisk expansion; Seebeck koefficient; elektrisk ledningsförmåga; SOFC material; magnetiska egenskaper; materialkemi; Materials Chemistry;

    Abstract : This PhD thesis presents investigations of perovskite-related compounds in systems of interest for applications in components in solid oxide fuel cells. The compound compositions derive from substitutions in the parent compounds LaCoO3, LaCrO3 and SrFeO3. READ MORE

  4. 4. Local structure of perovskite ferroelectric ceramics as revealed by 3D electron diffuse scattering A walk in between the Bragg peaks

    University dissertation from Stockholm : Department of materials and environmental chemistry, Stockholm University

    Author : Alexandra Neagu; Stockholms universitet.; [2018]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Electron diffraction; Diffuse scattering; Local structural disorder; Perovskite; Ferroelectric ceramics; Transmission electron microscopy; oorganisk kemi; Inorganic Chemistry;

    Abstract : Local structural disorder in crystalline materials plays a crucial role in understanding their properties. The means to study structural disorder is diffuse scattering (DS). READ MORE

  5. 5. Preparation and Characterization of Lead Halide Perovskites Towards sustainable, cost-effective and upscalable solar cell manufacture

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Kári Sveinbjörnsson; Uppsala universitet.; [2018]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; perovskite solar cells; perovskite; photoconductivity; carbon nanotubes; transparent contact; ambient processing; water-based; Chemistry with specialization in Physical Chemistry; Kemi med inriktning mot fysikalisk kemi;

    Abstract : The perovskite solar cell (PSC) is a recent contender within the photovoltaic research field. In a matter of a few years, the power conversion efficiency (PCE) of the PSC has catapulted from 4% to above 22%, which represents one of the fastest developments in the field. READ MORE