Search for dissertations about: "AlGaN"

Showing result 1 - 5 of 42 swedish dissertations containing the word AlGaN.

  1. 1. Societal Impacts of Modern Conscription : Human Capital, Social Capital and Criminal Behaviour

    Author : Daniel Almén; Heléne Berg; Mårten Palme; Yann Algan; Stockholms universitet; []
    Keywords : SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Conscription; Military; Human Capital; Social Capital; Civic Engagement; Crime; Criminal Behaviour; Labour Market; Election Participation; Nation-building; School for the Nation; Opportunity Cost; Welfare State; Economics; nationalekonomi;

    Abstract : Opportunity Costs and Conscription: An Unintended Progressive Tax?Throughout history to present days, policymakers, social commentators and others have oftentimes viewed conscription as a natural extension of secondary education, and an important institution for vocational training. This paper uses Swedish administrative data and exploits a reform in 2004, implying a sudden downsizing of the military, to identify the causal effects of peacetime conscription on later labour market outcomes and education. READ MORE

  2. 2. Towards Novel AlGaN-Based Light Emitters

    Author : Martin Stattin; Chalmers University of Technology; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; AlGaN; light emitting diode; deep ultraviolet; III-Nitrides; near infrared; quantum cascade laser;

    Abstract : The unique properties of the AlGaN semiconductors make them a suitable choice for optoelectronic devices at both short and long wavelengths, based on interband and intersubband transitions, respectively. What sets AlGaN apart from other wide-bandgap semiconductors is the possibility to obtain both p- and n-type conductivity as well as the direct bandgap. READ MORE

  3. 3. Elements of AlGaN-Based Light Emitters

    Author : Martin Stattin; Chalmers University of Technology; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; graphene; vertical cavity surface emitting laser; deep-ultraviolet; III-nitride; near-infrared; light emitting diode; visible; AlGaN; quantum cascade laser;

    Abstract : The III-nitrides have enabled a range of optoelectronic devices and associated applications of great industrial and societal importance. However, the full potential of the III-nitrides remains to be explored. READ MORE

  4. 4. Cathodoluminescence Studies of Quantum Structures and III-V nitrides

    Author : Anders Petersson; Fasta tillståndets fysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; AlGaN; Fysik; Physics; GaN-AlGaN; single dot spectroscopy; InP-GaInP; Stranski Krastanow; quantum dots; quantum wires; low-dimensional structures; InAs-GaAs; III-V nitride; Cathodoluminescence; III-V semiconductors; Fysicumarkivet A:1999:Petersson;

    Abstract : Characterization of low-dimensional semiconductor structures is a challenging task. The thesis is based on experiments, using cathodoluminescence (CL) as a tool for characterization. The high spatial resolution and the possibility of spectroscopy of small structures make CL one of the most powerful techniques for these types of investigations. READ MORE

  5. 5. Thin-film ultraviolet light-emitting diodes realized by electrochemical etching of AlGaN

    Author : Michael Alexander Bergmann; Chalmers University of Technology; []
    Keywords : NATURVETENSKAP; TEKNIK OCH TEKNOLOGIER; NATURAL SCIENCES; ENGINEERING AND TECHNOLOGY; electrochemical etching; substrate removal; thin-film flip-chip; thermocompression bonding; light-emitting diodes; AlGaN; heterogeneous integration; LEDs; ultraviolet light; UVB;

    Abstract : Ultraviolet (UV) light sources have a direct impact on everyone’s life. They are used to sterilize surfaces as well as for water purification. In addition, they are used in green houses to enhance health-promoting substances in plants, for phototherapy to treat skin diseases, for sensing and material curing. READ MORE