Search for dissertations about: "LEDs"

Showing result 6 - 10 of 107 swedish dissertations containing the word LEDs.

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

    Author : Jessika Luth Richter; Internationella miljöinstitutet; []
    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

  4. 7. A study of devices and materials for polymer based LEDs

    Author : Jonas Birgerson; Linköpings universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; conjugated; polymer; XPS; LED; Magnesium; blend; copolymer;

    Abstract : Since the discovery that it is possible to dope conjugated polymers into high electrical conductivity the research in the field of conjugated polymers has increased a lot. Much of the research activity has been concentrated to the design and fabrication of light emitting devices. READ MORE

  5. 8. 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

  6. 9. Fabrication and Characterization of ZnO Nanorods Based Intrinsic White Light Emitting Diodes (LEDs)

    Author : Nargis Bano; Omer Nour; Magnus Willander; David Rogers; Linköpings universitet; []
    Keywords : Zinc Oxide nanorods; White light emitting diode; Photoluminescence; Cathodoluminescence; Electroluminescence; Deep level transient spectroscopy DLTS ;

    Abstract : ZnO material based hetero-junctions are a potential candidate for the design andrealization of intrinsic white light emitting devices (WLEDs) due to several advantages overthe nitride based material system. During the last few years the lack of a reliable andreproducible p-type doping in ZnO material with sufficiently high conductivity and carrierconcentration has initiated an alternative approach to grow n-ZnO nanorods (NRs) on other ptypeinorganic and organic substrates. READ MORE

  7. 10. Lighting and Sensing Applications of Nanostructured ZnO, CuO and Their Composites

    Author : Ahmed ELtahir Elsharif Zainelabdin; Magnus Willander; Omer Nour; Leonard J. Brillson; Linköpings universitet; []
    Keywords : ZnO; CuO; Nanostructures; Composites; ZnO polymer LEDs; humidity sensor; p-n heterojunction;

    Abstract : Low dimensional nanostructures of zinc oxide (ZnO), cupric oxide (CuO), and their composite nanostructures possess remarkable physical and chemical properties. Fundamental understanding and manipulation of these unique properties are crucial for all potential applications. READ MORE