Sökning: "heterojunction interfaces"

Visar resultat 1 - 5 av 8 avhandlingar innehållade orden heterojunction interfaces.

  1. 1. Interfaces in Dye-Sensitized Oxide / Hole-Conductor Heterojunctions for Solar Cell Applications

    Författare :Erik Johansson; Håkan Rensmo; Hans Siegbahn; Anders Sandell; Villy Sundström; Uppsala universitet; []
    Nyckelord :Physics; Photoelectron spectroscopy; Solar cells; Heterojunction; Fysik;

    Sammanfattning : Nanoporous dye-sensitized solar cells (DSSC) are promising devices for solar to electric energy conversion. In this thesis photoelectron spectroscopy (PES), x-ray absorption spectroscopy (XAS) and photovoltaic measurements are used for studies of the key interfaces in the DSSC. LÄS MER

  3. 2. The life and death of perovskites : Interfacial function and degradation of lead halide perovskites studied by photoelectron spectroscopy

    Författare :Sebastian Svanström; Ute B Cappel; Håkan Rensmo; Erik Johansson; Selina Olthof; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; lead halide perovskite solar cells; interfacial degradation; heterojunction interfaces; photoelectron spectroscopy; operando; Physics with spec. in Atomic; Molecular and Condensed Matter Physics; Fysik med inriktning mot atom- molekyl- och kondenserande materiens fysik;

    Sammanfattning : Lead halide perovskite solar cells are a promising new technology which could soon see widespread commercial application but is partly held back by poor long-term stability. In this thesis, photoelectron spectroscopy (PES) is used to study the dynamical processes at the surface or interfaces of lead halide perovskite materials. LÄS MER

  4. 3. Influence of intermolecular order at the interfaces

    Författare :Parisa Sehati; Michel P. de Jong; Mats Fahlman; Giovanna Iucci; Linköpings universitet; []
    Nyckelord :;

    Sammanfattning : The work presented in this thesis covers a range of different surfaces and interfaces of organic molecules/polymers and metallic materials. It is of vita importance to understand how charge transfer processes and other electrical interactions existing at physisorped contacts can influence the electronic structure at an interface. LÄS MER

  5. 4. Studies of Morphology and Charge-Transfer in Bulk-Heterojunction Polymer Solar Cells

    Författare :Zaifei Ma; Fengling Zhang; Olle Inganäs; Ludvig Edman; Linköpings universitet; []
    Nyckelord :;

    Sammanfattning : The work presented in this thesis focuses on the two critical issues of bulk-heterojunction polymer solar cells: morphology of active layers and energy loss during charge transfer process at electron donor/acceptor interfaces. Both issues determine the performance of polymer solar cells through governing exciton dissociation, charge carrier recombination and free charge carrier transport. LÄS MER

  7. 5. Interface Phenomena in Organic Electronics

    Författare :Qinye Bao; Mats Fahlman; Xianjie Liu; Slawomir Braun; Mathieu Turbiez; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : Organic electronics based on organic semiconductors offer tremendous advantages compared to traditional inorganic counterparts such as low temperature processing, light weight, low manufacturing cost, high throughput and mechanical flexibility. Many key electronic processes in organic electronic devices, e.g. LÄS MER