Search for dissertations about: "LEDs"

Showing result 1 - 5 of 80 swedish dissertations containing the word LEDs.

  1. 1. Luminescence Properties of ZnO Nanostructures and Their Implementation as White Light Emitting Diodes (LEDs)

    University dissertation from Linköping : Linköping University Electronic Press

    Author : Naveed ul Hassan Alvi; Magnus Willander; Omer Nour; Vladimir V. Mitin; [2011]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Nanotechnology; Zinc oxide; nanostructures; luminescence; LEDs; color rendering; NATURAL SCIENCES; NATURVETENSKAP;

    Abstract : In this thesis, luminescence properties of ZnO nanostructures (nanorods, nanotubes, nanowalls and nanoflowers) are investigated by different approaches for possible future application of these nanostructures as white light emitting diodes. ZnO nanostructures were grown by different growth techniques on different p-type substrates. READ MORE

  2. 2. Heterojunctions between zinc oxide nanostructures and organic semiconductor

    University dissertation from Linköping : Linköping University Electronic Press

    Author : Amal Hansson (f.d. Wadeasa); Xavier Crispin; Dominique Vuillaume; [2011]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; ZnO nanostructures; Organic semiconductors; LEDs; NATURAL SCIENCES; NATURVETENSKAP;

    Abstract : Lighting is a big business, lighting consumes considerable amount of the electricity. These facts motivate for the search of new illumination technologies that are efficient. Semiconductor light emitting diodes (LEDs) have huge potential to replace the traditional primary incandescent lighting sources. READ MORE

  3. 3. Fabrication and Characterization of Zinc Oxide Nanostructures for Piezoelectric, Mechanical and Electrical Applications

    University dissertation from Linköping : Linköping University Electronic Press

    Author : Muhammad Yousuf Soomro; Magnus Willander; Omer Nur; Christian Falconi; [2014]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Nanotechnology; Zinc oxide; nanowires nanorods nanotubes; piezoelectric effect; nanogenerator; flexible substrate; p-type polymers; elastic modulus; LEDs; electrical characteristics;

    Abstract : Nanotechnology, the science of manipulating materials on an atomic or molecular scale is one of the fastest growing areas of research and technology. Nanotechnology has a vast range of applications in medicine, electronics, biomaterials and energy production. New developments in nanotechnology are growing all the time. READ MORE

  4. 4. Localization effects in ternary nitride semiconductors

    University dissertation from Linköping : Linköping University Electronic Press

    Author : Vytautas Liuolia; Saulius Marcinkevicius; Toshiharu Saiki; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; AlGaN; InGaN; AlInN; LEDs; near-field microscopy; carrier dynamics; alloy fluctuations; carrier localization; built-in electric field; nonpolar planes; polarized luminescence;

    Abstract : InGaN based blue and near-ultraviolet light emitting diodes and laser diodes have been successfully commercialized for many applications such as general lighting, display backlighting and high density optical storage devices. Despite having a comparably high defect density, these devices are known for their efficient operation, which is attributed to localization in potential fluctuations preventing carriers from reaching the centers of nonradiative recombination. READ MORE

  5. 5. Extended Producer Responsibility for Closing Material Loops: Lessons from energy-efficient lighting products

    University dissertation from Lund University

    Author : Jessika Luth Richter; [2016-11-30]
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Extended Producer Responsibility; recycling; fluorescent lighting; waste management; Policy Evaluation; LEDs; WEEE Directive;

    Abstract : The transition to a low-carbon economy requires enabling technologies including energy-efficient lighting products. It is increasingly recognized that a sustainable economy is not only low-carbon and energy efficient, but also resource efficient. READ MORE