Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 17 of 17 for “"Black phosphorus"”.
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CHARGE AND SPIN TRANSPORT STUDIES IN GRAPHENE AND BLACK PHOSPHORUS
Transport studies in graphene and black phosphorus two-dimensional systems will be explored in this thesis. Specifically, I studied the spin transport and spin characteristics of graphene subjected to an enhancement of its otherwise low intrinsic spin-orbit coupling. Taking advantage of its …
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Waveguide Integrated Optoelectronics Using Two-Dimensional Materials
… Next, the first waveguide integrated black phosphorus photodetector is demonstrated with superior dark current to its graphene counterparts. Operation speeds six orders of magnitude higher than any previous black phosphorus detector is demonstrated together with a clear understanding …
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Photodetection and Spectrometry at the Nanoscale
… compositionally-engineered nanowires and layered black phosphorus – are developed and studied. An ultra-miniaturised microspectrometer device platform is demonstrated, based on individual compositionally-engineered nanowires. Representing the most compact microspectrometer design to date, by over …
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Electronic devices based on 2D material: fabrication, characterization and analysis
… the intrinsic and extrinsic properties of black phosphorus (BP) by AC conductance and capacitance methods. Black phosphorus capacitors with various types of gate dielectrics were fabricated and measured at varying temperatures. From the temperature dependence of the transition frequency, we …
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Chalcogenide Glass on Layered van der Waals Crystals for Integrated Photonic Devices
… layer for unstable vdW materials such as black phosphorus. We then fabricate and characterize black phosphorus and tellurene based mid-infrared photodetectors, which not only achieve high sensitivity, but also give insight to the critical role of vdW material anisotropy in photodetection. …
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Large-scale density functional theory study of van-der-Waals heterostructures
… as transition metal dichalcogenides (TMDC) or black phosphorus (BP) and hexagonal boron nitride (hBN). We show that hBN can protect BP from external influences, while also preventing the band-gap reduction in BP stacks, and enabling the use of BP heterostructures as tunnelling field effect …
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Towards building a prototype spin-logic device
… and uses it to extract the band gap of black-phosphorus thin-films in an attempt to characterize novel 2D-materials.</p>
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Printable 2d Material Optoelectronics and Photonics
… as transition metal dichalcogenides (TMDs) and black phosphorus (BP) hold enormous potential for the next generation optoelectronics and photonics. Pairing 2d materials with printing is an emerging cost-effective large-scale device fabrication strategy. However, the current inks are far from …
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Light-matter interactions of two-dimensional materials and the coupled nanostructures
… spectroscopy. Twisted bilayer MoS2 and few-layer black phosphorus were chosen to demonstrate the interlayer coupling from the perspective of interlayer breathing and shear Raman modes. These exemplary studies offer a great tool to investigate the interlayer coupling, thickness, and stacking …
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2d Material Inks for Printed Electronics
… (e.g. graphene) and semiconducting (e.g. black phosphorus) 2d materials and less emphasis has been placed on dielectric layers using wide bandgap 2d materials like hexagonal boron nitride (h-BN), which represent an important material in printed electronics applications, for example, in …
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Two-dimensional electronics and optoelectronics: From materials syntheses to device applications
… molybdenum disulfide (MoS2), and the other is black phosphorus. Most of my research is based on these two materials, I tried to study from the synthesis of the materials, and then study the electronics applications of these materials.</p> <p>In the first part of the thesis, an introduction of …
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On the Impact and Growth of Plasma-enhanced Atomic Layer Deposition High- Dielectrics on 2D Crystals
… as transition metal dichalcogenides (TMDs) and black phosphorus (BP). 2D field-effect transistors (FETs) benefit from the atomic thinness of these materials, allowing them to be aggressively scaled down while avoiding short channel effects (SCEs). Their atomic thinness also means they are …
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Thermal transport in two-dimensional materials and magnetic multilayers
… materials having in-plane anisotropies, i.e., black phosphorus, WTe2, and ReS2, which were first prepared in 2D structures all in 2014. These materials are promising candidates for next-generation electronics and optoelectronics, and the knowledge of thermal transport properties is needed for …
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Electron beam processing and spectroscopic characterisation of 2D materials and novel nanostructures
… in the inorganic two-dimensional (2D) materials black phosphorus (BP) and hexagonal boron nitride (hBN) has exponentially risen due to the distinct advantages they possess over their bulk counterparts. Excellent and unique mechanical, electronic and optical properties have recently been …
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Investigating Quantum Processes in Disordered Materials
… material, monolayer nanoribbons of black phosphorus, where we find that the ribbons show signatures of strong ground state magnetism and on picosecond timescales, the photoexcitation couples to the magnetic edges. Finally, we examine the role of `dynamic disorder' that manifests …
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AB initio study and design of 2D materials/III-nitrides-based post-CMOS devices using first-principles multiphysics simulation framework
… and homojunction TFETs based on multilayer black phosphorus (BP) and transition metal dichalcogenides (TMDCs), including MoS2. Also, we tested our ideas by numerical simulations employing the semiclassical density gradient quantum correction model. It is found that the vertical TFET based on …
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Understanding and engineering electronic and optoelectronic properties of 2D materials and their interfaces
… 2D vdW heterointerfaces, the possibility of a black phosphorus (BP)-MoS2 vertical heterostructure as an ultrathin channel material for high-performance 2D (opto)electronic devices is studied. CVD-synthesized MoS2 and micromechanically exfoliated BP crystals are stacked together to form a …