Sökning: "ohmic contact"

Visar resultat 16 - 20 av 35 avhandlingar innehållade orden ohmic contact.

  1. 16. Processing and characterization of silicon carbide (6H-SiC and 4H-SiC) contacts for high power and high temperature device applications

    Författare :Sang Kwon Lee; KTH; []
    Nyckelord :Silicon carbide; ohmic and schottky contacts; co-evaporation; current-voltage; powre devices; nano-particles; Schottky barrier height lowering; TLM structures;

    Sammanfattning : Silicon carbide is a promising wide bandgap semiconductormaterial for high-temperature, high-power, and high-frequencydevice applications. However, there are still a number offactors that are limiting the device performance. LÄS MER

  3. 17. Novel Layered and 2D Materials for Functionality Enhancement of Contacts and Gas Sensors

    Författare :Hossein Fashandi; Per Eklund; Anita Lloyd Spetz; Mike Andersson; Lars Hultman; Ganpati Ramanath; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : Chemical gas sensors are widely-used electronic devices for detecting or measuring the density levels of desired gas species. In this study, materials with established or potential applications for gas sensors are treated. LÄS MER

  4. 18. Nanostructured materials for gas sensing applications

    Författare :Kristina Buchholt; Per Eklund; Lars Hultman; Anita Lloyd Spetz; Harry L. Tuller; Linköpings universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP;

    Sammanfattning : In this Thesis I have investigated the use of nanostructured films as sensing and contact layers for field effect gas sensors in order to achieve high sensitivity, selectivity, and long term stability of the devices in corrosive environments at elevated temperatures. Electrochemically synthesized Pd and Au nanoparticles deposited as sensing layers on capacitive field effect devices were found to give a significant response to NOx with small, or no responses to H2, NH3, and C3H6. LÄS MER

  5. 19. Functional Nanostructures for Gas Sensors

    Författare :Hossein Fashandi; Per Eklund; Hans Högberg; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : This research focuses on three main topics within the aims of FUNMAT, which are:Ohmic contacts to high-temperature chemical gas sensors.Studies of catalytic monolayers on active gate metal in SiC-based gas sensors.Investigating potential sensing properties of the nanoscale material MXene. LÄS MER

  7. 20. Tailoring of Contacts on Silicon Carbide - Procedures and Mechanisms

    Författare :S. A. Perez-Garcia; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; interfacial reaction; metallic contacts; Silicon carbide; silicides; XPS.;

    Sammanfattning : Silicon carbide (SiC) exhibits very good electrical, thermal, chemical and mechanical properties which make it suitable for the next generation of wide band gap electronic devices, where silicon (Si) cannot be used due to its limitations with respect to the mentioned properties. Nickel (Ni) and Tantalum (Ta) are among the metals used for the contact formation. LÄS MER