Sökning: "passivation layers"

Visar resultat 1 - 5 av 31 avhandlingar innehållade orden passivation layers.

  1. 1. The Multiple Faces of Interfaces : Electron microscopy analysis of CuInSe2 thin-film solar cells

    Författare :Olivier Donzel-Gargand; Marika Edoff; Lionel Fourdrinier; Thomas Thersleff; Daniel Abou-Ras; Uppsala universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electron microscopy; TEM; STEM; EELS; EDS; solar cells; CIGS; ACIGS; CZTS; post deposition treatment; KF; RbF; buffer layers; interfaces; inter layers; barrier layers; passivation layers; Teknisk fysik med inriktning mot materialvetenskap; Engineering Science with specialization in Materials Science; Teknisk fysik med inriktning mot elektronik; Engineering Science with specialization in Electronics;

    Sammanfattning : The CIS solar cell family features both a high stability and world-class performances. They can be deposited on a wide variety of substrates and absorb the entire solar spectrum only using a thickness of a few micrometers. LÄS MER

  3. 2. Termination and passivation of Silicon Carbide Devices

    Författare :Maciej Wolborski; Anders Hallén; Jan Szmidt; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Silicon Carbide; SiC; passivation; dielectric materials; Semiconductor physics; Halvledarfysik;

    Sammanfattning : Silicon carbide rectifiers are commercially available since 2001, and MESFET switches are expected to enter the market within a year. Moreover, three inch SiC wafers can be purchased nowadays without critical defects for the device performance and four inch substrate wafers are announced for the year 2005. LÄS MER

  4. 3. Optimization of Ohmic Contacts and Surface Passivation for ‘Buffer-Free’ GaN HEMT Technologies

    Författare :Chen Ding Yuan; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; QuanFINE; passivation; GaN HEMT; pretreatment; ohmic contact;

    Sammanfattning : Gallium nitride high electron mobility transistors (GaN HEMTs) draw attention from high frequency and high power industries due to unique properties including high electron mobility and saturation velocity combined with high breakdown voltage. This makes GaN HEMTs suitable for power devices with high switching speed and high frequency applications with high power density requirements. LÄS MER

  5. 4. In the confines of Cu(In,Ga)Se2 thin film solar cells with rear surface passivating oxide layers

    Författare :Dorothea Ledinek; Marika Edoff; Charlotte Platzer Björkman; Jan Keller; Christian Kaufmann; Uppsala universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Alkali; Alumina; Back contact; CIGS; CIGSe; Hafnia; Passivation; Rear contact; Sodium fluoride; Ultra-thin; Teknisk fysik med inriktning mot elektronik; Engineering Science with specialization in Electronics;

    Sammanfattning : The material supply to build renewable energy conversion systems needs to be considered from both a cost and an energy security perspective. For Cu(In,Ga)Se2 (CIGS) thin film solar cells the use of indium in the absorber layer is most problematic. LÄS MER

  7. 5. Dynamics of Photogenerated Charge Carriers in III-V Bulk and Nanowire Semiconductors

    Författare :Xianshao Zou; NanoLund: Centre for Nanoscience; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Time-resolved spectroscopy; Group III-V semiconductor; Nanowires; Carrier recombination; Trapping; Passivation;

    Sammanfattning : As a solution to solving energy consumption and environment problems, photovoltaics has become one type of the promising devices to convert solar energy into electricity directly. In some special areas like in space, a kind of photovoltaics with lightweight and reliable properties is needed to supply power. LÄS MER