Search for dissertations about: "LEDs"

Showing result 11 - 15 of 107 swedish dissertations containing the word LEDs.

  2. 11. Optical properties and degradation of deep ultraviolet AIGaN-based light-emitting diodes

    Author : Andrea Pinos; Saulius Marcinkevicius; Andreas Hangleiter; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; AIGaN; deep-UV LEDs; polarization fields; screening; exciton binding energy; alloy fluctuations; near-field microscopy; carrier dynamics; LED aging; Optics; Optik;

    Abstract : .... READ MORE

  4. 12. Defects and crystallinity control of perovskite films for light-emitting diodes

    Author : Zhongcheng Yuan; Olle Inganäs; Feng Gao; David Ginger; Linköpings universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Metal halide perovskites are promising materials for the fabrication of cost-effective and highperformance light-emitting diodes (LEDs), due to their solution processability, high photoluminescence quantum efficiencies (PLQEs) and excellent charge transport properties. Importantly, perovskite LEDs show ultra-pure emission color, which is better than that of the state-of-the-art quantum dot LEDs (QLEDs) and organic LEDs (OLEDs), demonstrating a bright application potential for realizing vivid natural colors display in the future. READ MORE

  5. 13. Device Fabrication and Photosensitizing Role of ZnO Nanostructures in Photodynamic Therapy of Cancer

    Author : Kishwar Sultana; Magnus Willander; Omer Nour; Arne Rosén; Linköpings universitet; []
    Keywords : Zinc oxide nanostructures; light emitting diodes; reactive oxygen species; photosensitizer; cancer cell; photodynamic therapy; NATURAL SCIENCES; NATURVETENSKAP;

    Abstract : In nanoscience and nanotechnology, zinc oxide (ZnO) is gaining much research attention due to direct wide band gap (3.3 eV), large exciton binding energy (60 meV), and deep level defects emissions that cover the whole visible range. READ MORE

  6. 14. Light-phyllosphere interactions in greenhouse grown ornamentals

    Author : Samareh Gharaie; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Keywords : LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Abstract : Light-emitting diodes (LEDs) have emerged as a promising artificial lighting source in greenhouse production of horticultural crops, as they reduce energy consumption. However, changes in lighting technology are known to affect abiotic and biotic interactions in the phyllosphere, e.g. READ MORE

  7. 15. 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