Search for dissertations about: "electron-hole pairs"

Showing result 1 - 5 of 33 swedish dissertations containing the words electron-hole pairs.

  2. 1. Electron-hole-pair excitations at aluminium surfaces

    Author : Ulf Jonasson; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; electron-hole-pairs; aluminium; diploe scattering; electron energy-loss spectroscopy; surface response functiion;

    Abstract : .... READ MORE

  4. 2. Bose-Einstein Condensation of Magnetic Excitons in Semiconductor Quantum Wells

    Author : Vitalie Boţan; Lars Nordström; Sveatoslav Moskalenko; Pavlos Lagoudakis; Uppsala universitet; []
    Keywords : Physics; Bose-Einstein condensation; magnetic excitons; electron-hole pairs; electron-hole liquid; magnetorotons; magnetoplasmons; superfluidity; Fysik;

    Abstract : In this thesis regimes of quantum degeneracy of electrons and holes in semiconductor quantum wells in a strong magnetic field are studied theoretically. The coherent pairing of electrons and holes results in the formation of Bose-Einstein condensate of magnetic excitons in a single-particle state with wave vector K. READ MORE

  5. 3. On Generation and Recombination in Cu(In,Ga)Se2 Thin-Film Solar Cells

    Author : Jonas Malmström; Lars Stolt; Uwe Rau; Uppsala universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electronics; solar energy conversion; solar cells; Cu In; Ga Se2; device modelling; optical properties; electron-hole generation; light trapping; electron-hole recombination; Elektronik; Electronics; Elektronik;

    Abstract : The solar cell technology based on Cu(In,Ga)Se2 (CIGS) thin-films provides a promising route to cost competitive solar electricity. The standard device structure is ZnO:Al/ZnO/CdS/CIGS/Mo films on a glass substrate, where the first three layers are n-type semiconductors with wide bandgaps, forming a pn-junction with the p-type CIGS absorber layer; the Mo layer serves as a back contact. READ MORE

  6. 4. Plasmonic Properties of Pt and Pd Nanodisks

    Author : Christoph Langhammer; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; scattering; electron-hole pairs; plasmon mediated photochemistry; Pd; Localized Surface Plasmon Resonance; Pt; plasmon decay; absorption; extinction; branching ratio;

    Abstract : .... READ MORE

  7. 5. Development of Graphitic Carbon Nitride based Semiconductor Photocatalysts for Organic Pollutant Degradation

    Author : Jing Wang; Pär Jönsson; Anders Palmqvist; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; graphitic carbon nitride; visible light-driven photocatalyst; staggered band alignment; electron-hole pair separation; band edge position; Materials Science and Engineering; Teknisk materialvetenskap;

    Abstract : As a potential solution to the global energy and environmental pollution, design and synthesis of artificial photocatalysts with high activities have attracted increasing scientific interests worldwide. In recent years, the graphitic carbon nitride (g-C3N4) has shown new possible applications in the photocatalytic field due to its unique properties. READ MORE