Blar i NTNU Open på forfatter "Fimland, Bjørn-Ove"
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Molecular Beam Epitaxy of GaN/AlGaN Nanocolumns on Graphene for Potential Application in Ultraviolet Light-Emitting Diodes
Liudi Mulyo, Andreas (Doctoral theses at NTNU;2021:217, Doctoral thesis, 2021)Hybrid integration of defect-free III-nitride semiconductor nanocolumns and two-dimensional graphene as their substrate is an extremely promising route towards the development of ultraviolet light emitters, as graphene can ... -
Optimization and characterization of the Front Surface Field in Back-Contact Silicon Solar Cells
Krystad, Egil Grøndal (Master thesis, 2008)Interdigitated back-contact (IBC) solar cells are devices requiring very high carrier lifetimes. In this thesis, an investigation of the front-surface field (FSF) for increasing the effective lifetime of such solar cells ... -
Patterning of the Oxide Mask for Nanowire Growth by Dry Etching
Ueland, Åsmund Stenhaug (Master thesis, 2015)In this master s thesis it is investigated how inductively coupled plasma reactive-ion etching, in combination with hydrofluoric acid wet etching, can be used to produce consistent and reliable nanoscaled holes with a high ... -
Plasma-assisted oxide removal from p-type GaSb for low resistivity ohmic contacts
Tran, Thanh-Nam; Patra, Saroj Kumar; Breivik, Magnus; Fimland, Bjørn-Ove (Journal article, 2015)The effect of several plasma-assisted oxide removal techniques prior to metallization of p-type GaSb was investigated. Compared to conventional chemical methods, the plasma-assisted oxide removal resulted in significant ... -
Processing Techniques for Dilute Nitride Gallium Arsenide Intermediate-Band Solar Cell Structures
Hallum, Goran Erik (Master thesis, 2016)A solar cell processing procedure is calibrated for dilute nitride GaAs intermediate band solar cell structures, and applied to a reference GaAs cell. The processing consists of front and backside contact metalization, a ... -
Quantitative strain analysis of InAs/GaAs quantum dot materials
Vullum, Per Erik; Nord, Magnus Kristofer; Vatanparast, Maryam; Thomassen, Sedsel Fretheim; Boothroyd, Chris; Holmestad, Randi; Fimland, Bjørn-Ove; Reenaas, Turid Worren (Journal article; Peer reviewed, 2017)Geometric phase analysis has been applied to high resolution aberration corrected (scanning) transmission electron microscopy images of InAs/GaAs quantum dot (QD) materials. We show quantitatively how the lattice mismatch ... -
Single-Mode Near-Infrared Lasing in a GaAsSb-Based Nanowire Superlattice at Room Temperature
Ren, Dingding; Ahtapodov, Lyubomir; Nilsen, Julie Stene; Yang, Jianfeng; Gustafsson, Anders; Huh, Junghwan; Conibeer, G; Van Helvoort, Antonius; Fimland, Bjørn-Ove; Weman, Helge (Journal article; Peer reviewed, 2018)Semiconductor nanowire lasers can produce guided coherent light emission with miniaturized geometry, bringing about new possibilities for a variety of applications including nanophotonic circuits, optical sensing, and ... -
Systematic investigation into the influence of growth conditions on InAs/GaAs quantum dot densities and sizes for intermediate band solar cell application
Vitelli, Stefano (Master thesis, 2010)The influence of the conditions during growth of InAs/GaAs quantum-dot structureson GaAs(001) by molecular-beam epitaxy was investigated systematically with respect to achieving high quantum dot densities, homogeneity and ... -
Ultraviolet Optoelectronic Devices Based on GaN/AlGaN Nanowires Grown on Graphene Substrates
Toftevaag, Håvard Hem (Master thesis, 2020)Dioder av gruppe III-nitrid halvledermateriale har utstrakte anvendelser innen den synlige delen av det elektromagnetiske spekteret. Feltet som omhandler bruken av ultrafiolette optoelektroniske komponenter er mindre modent, ... -
Using FIB-SEM as a Platform for the Positioning and Correlated Characterization of III-V Nanowires
Mosberg, Aleksander Buseth; Ren, Dingding; Fauske, Vidar Tonaas; Fimland, Bjørn-Ove; Van Helvoort, Antonius (Journal article; Peer reviewed, 2018) -
Vertical GaN nanocolumns grown on graphene intermediated with a thin AlN buffer layer
Liudi Mulyo, Andreas; Rajpalke, Mohana Krishnappa; Kuroe, Haruhiko; Vullum, Per-Erik; Weman, Helge; Fimland, Bjørn-Ove; Kishino, Katsumi (Journal article; Peer reviewed, 2018)We report on the self-assembled growth of high-density and vertically-oriented n-doped GaN nanocolumns on graphene by radio-frequency plasma-assisted molecular beam epitaxy. Graphene was transferred to silica glass, which ... -
X-ray diffraction studies of InAs/GaAs heterostructures
Wrålsen, Arnt Joakim (Master thesis, 2012)Intermediate band solar cells (IBSC) is a proposed new type of solar cell device that has an intermediate energy band in the band gap. One possible implementation of IBSCs is by using arrays of nano-sized semiconductor ...