Search for dissertations about: "Ultraviolet photoelectron spectroscopy UPS"

Showing result 1 - 5 of 7 swedish dissertations containing the words Ultraviolet photoelectron spectroscopy UPS.

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

   Author : Torbjörn Rander; Olle Björneholm; Gunnar Öhrwall; Maxim Tchaplyguine; Matthias Neeb; Uppsala universitet; []
   Keywords : 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;

   Abstract : 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. READ MORE

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

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

   Abstract : 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. READ MORE

5. 3. Image dipoles and polarons in organic semiconductors

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

   Abstract : 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. READ MORE

6. 4. Materials and interfaces for sustainable organic solar cells

   Author : Qilun Zhang; Mats Fahlman; Xianjie Liu; Ronald Österbacka; Linköpings universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Organic Solar Cell; Interfaces; Photoelectron Spectroscopy; Natural based materials; Sustainable;

   Abstract : Photovoltaics, the apparatus utilizing green solar power to generate electricity, is one of the efficient measures to the continuously increasing energy demand and exacerbated carbon emission of the human civilization. As a candidate with the potential of providing the cheapest and greenest form of electricity, organic solar cells (OSCs) received tremendous scientific interest, resulting in a significant power conversion efficiency (PCE) boosting to above 19% recently. READ MORE

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

   Author : Grzegorz Greczynski; Hans Siegbahn; Linköpings universitet; []
   Keywords : ;

   Abstract : 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). READ MORE