Sökning: "Ultraviolet photoelectron spectroscopy UPS"

Visar resultat 1 - 5 av 6 avhandlingar innehållade orden Ultraviolet photoelectron spectroscopy UPS.

  1. 1. Photoelectron Spectroscopy on Atoms, Molecules and Clusters : The Geometric and Electronic Structure Studied by Synchrotron Radiation and Lasers

    Författare :Torbjörn Rander; Olle Björneholm; Gunnar Öhrwall; Maxim Tchaplyguine; Matthias Neeb; Uppsala universitet; []
    Nyckelord :Atomic and molecular physics; Free clusters; Electron spectroscopy; Doped clusters; Laser excitation; Alkali metals; Electronic structure; Geometric structure; X-ray photoelectron spectroscopy XPS ; Resonant Auger spectroscopy RAS ; Near-threshold x-ray absorption fine structure NEXAFS ; Ultraviolet photoelectron spectroscopy UPS ; Detuning; Ultra-fast dissociation UFD ; Sodium; Potassium; Oxygen; Bromomethane; Argon; Xenon; Krypton; Molecular field splitting; Core hole lifetime; Core excitation; Atom- och molekylfysik;

    Sammanfattning : Atoms, molecules and clusters all constitute building blocks of macroscopic matter. Therefore, understanding the electronic and geometrical properties of such systems is the key to understanding the properties of solid state objects. LÄS MER

  2. 2. Chemical and electronic structure of electroluminescent materials and interfaces in polymer-LEDs

    Författare :Annica Andersson; Linköpings universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; conjugated polymer; XPS; UPS; LED; ITO; interface; chemical interaction; doping;

    Sammanfattning : Following the discovery that conjugated polymers can be used as the emitting layer in light­ emitting devices, extensive studies on these materials have been carried out. In a few years, due to the development of new materials and an increasing knowledge of the underlying chemistry and physics, the performance has improved a lot. LÄS MER

  3. 3. Image dipoles and polarons in organic semiconductors

    Författare :Yongzhen Chen; Mats Fahlman; Xianjie Liu; Yiqiang Zhan; Linköpings universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Organic electronics; Interface dipole; Polaron; Conjugated polymer; Photoelectron spectroscopy; N-type doping; Electron transport material;

    Sammanfattning : The rapid development of organic electronics depends on the synthesis of new π-conjugated molecules/polymers and the exploration of fundamental physics. However, most of the efforts have been concentrated on the former, leading to a lack of thorough understanding of many important concepts, which will become the ultimate limiting factor for overall performance and applications. LÄS MER

  4. 4. Photoelectron spectroscopy studies of conjugated polymer surfaces and interfaces for organic-based light emitting devices

    Författare :Grzegorz Greczynski; Hans Siegbahn; Linköpings universitet; []
    Nyckelord :;

    Sammanfattning : Since the initial discovery of metallic conductivity in doped polyacetylene in 1977, which lead to the Nobel Prize in Chemistry year 2000, the field of conducting polymers has expanded tremendously. Today, research developments in this area cover transistors, photodiodes and light emitting diodes (LEDs). LÄS MER

  5. 5. Electronic properties of organic molecular materials

    Författare :Mikael Unge; Linköpings universitet; []

    Sammanfattning : In the context of molecular based electronics, different molecular systems have been studied. In molecular crystals of pentacene, the conduction process has been reported to occur in a single layer in field-effect transistor applications. LÄS MER