Sökning: "silicon nanowire"

Visar resultat 31 - 35 av 46 avhandlingar innehållade orden silicon nanowire.

  1. 31. Single Junction and Tandem Junction Nanowire Solar Cells

    Författare :David Alcer; NanoLund: Centre for Nanoscience; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Nanowire solar cell; GaInP; InP; Tandem junction; Vertical processing;

    Sammanfattning : Solar cells based on silicon are successfully harvesting solar energy in established and increasingly widespread solar panels. However, their efficiency is limited by the Shockley–Queisser limit. For certain applications where high efficiency is the key figure of merit, the use of multi-junction solar cells is desirable. LÄS MER

  3. 32. Design, Fabrication and Characterization of Planar Lightwave Circuits Based on Silicon Nanowire Platform

    Författare :Ning Zhu; Lech Wosinski; Richard De La Rue; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electrical engineering; electronics and photonics; Elektroteknik; elektronik och fotonik;

    Sammanfattning : Optical devices based on Planar Lightwave Circuit (PLC) technology have well been studied due to their inherited advantages from Integrated Circuits (IC), such as: small size, high reliability, mass production and potential integration with microelectronics. Among all the materials, silicon nanowire platform gains more and more interest. LÄS MER

  4. 33. Studies of Nanowire Friction using AFM-based Manipulation

    Författare :Gabriela Conache; Fasta tillståndets fysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Nanomanipulation; AFM; Nanowires; Nanotribology; Friction; Nanotechnology.;

    Sammanfattning : In this thesis we present friction studies on InAs nanowires pushed laterally across surfaces by an AFM tip. The contact length in the direction of movement is of the order of a few tens of nanometers, and is thus comparable to that found in existing point-contact studies, but perpendicular to the motion the wire can be several microns in length. LÄS MER

  5. 34. Kinetic and thermodynamic modelling of ternary nanowire growth

    Författare :Egor Leshchenko; NanoLund: Centre for Nanoscience; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; III-V semiconductor materials; ternary nanowires; composition; crystal structure; modelling; Fysicumarkivet A:2021:Leshchenko;

    Sammanfattning : Among nanoscale structures of different shapes and dimensions nanowires are one of the most promising because of its truly unique properties different from their bulk counterparts. The energy quantization, perfect defect-free structure, and the possibility to grow them within the miscibility gap in combination with the benefits of bottom-up design and the possibility of integration on silicon substrates make nanowires ideal candidates for applications in optoelectronics, biotechnology and energy harvesting. LÄS MER

  7. 35. Theoretical study of electronic structure and optical properties of semiconductor nanostructures

    Författare :Martin Persson; Fasta tillståndets fysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; nanowire superlattices; nanostructures; band structure; wavefunctions; III-V materials; optical properties; Halvledarfysik; Semiconductory physics; Fysicumarkivet A:2004:Persson; Tight-binding theory; nanocrystals; nanowires;

    Sammanfattning : In this thesis, the electronic structure and optical properties of semiconductor nanostructures are studied theoretically. Three types of nanostructures have been studied, silicon nanocrystals, free-standing III-V nanowires and free-standing GaAs/AlGaAs nanowire superlattices. LÄS MER