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 20 of 26 for “"Interfacial engineering"”.
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Strain and interfacial engineering of 2D materials
Embargo set by: Seth Robbins for item 123448 Lift date: 2024-04-29T21:58:46Z Reason: Author requested closed access (OA after 2yrs) in Vireo ETD system
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Interfacial engineering and alternative device architectures for perovskite photovoltaics
Anthropogenic climate change largely caused by burning fossil fuels for energy generation is a major threat to the well-being of people and nature. Converting sunlight directly into electricity using photovoltaic (PV) devices provides a safe, renewable energy source for a sustainable future. Metal …
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Approaching Novel Perovskites Photovoltaic Devices through Machine Learning and Interfacial Engineering
Organic metal halide perovskites have shown plenty of extraordinary optoelectronic properties which make them good candidates for various photovoltaic applications [1-5]. The fascinating optoelectronic properties of perovskite largely take credit to their low exciton binding energy, strong light …
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Controlling crystallization via interfacial engineering : patterning, fouling-inhibition, and nutrient recovery
… and as a separation process for recovery. Interfacial engineering is a natural starting point for controlling crystallization due to a propensity of many forms of crystals to form at phase boundaries. Control of crystallization on solid substrates is accomplished by modification of the …
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Interfacial engineering to control phase transitions : applications in icing and mineral scale fouling
… both the phenomena. Using the tools of surface engineering, I suggest three approaches in this thesis to address these problems - superhydrophobicity, lubricant-impregnation and active electric fields. While micro-textured superhydrophobic surfaces have been shown to be bad for anti-icing due to …
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Singlet exciton fission-enhanced silicon photovoltaics: Interfacial engineering, device design and spectroscopic technique development
… This thesis tackles these three parts from an interfacial materials, device architecture and spectroscopy approach. Using tetracene as the singlet fission layer and n-doped silicon, we show that defect-induced states in a thin interlayer of hafnium oxynitride that lie near the band edge of …
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Interfacial engineering and spectroscopy of spin-triplet excitons for singlet fission sensitization of silicon solar cells
… at its surface. In this thesis, I employ interfacial engineering and spin-triplet spectroscopic tech- niques to explore three different approaches to singlet fission sensitization of silicon: radiative energy transfer, direct triplet transfer, and charge transfer. In the first approach, …
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Photoemission Studies of *Interface Effects on Thin Film Properties
… thermal stability behaviors can be controlled by interfacial engineering.
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Interface-Governed Optical Properties of Van der Waals Heterostructures
… with desirable functionalities, proper interfacial engineering is essential as vdW interfaces between the layers govern the physical properties of the entire structure. In this thesis, I investigate the optical properties of vdW heterostructures in which the interfaces are engineered by …
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INTERFACES IN THIN-FILM SOLID-STATE BATTERIES
… of the frequency and the applied voltage. Interfacial impedances, as well as space-charge layers formed at heterojunctions during charge and discharge processes, were successfully deconvoluted using the diagnostic test devices and electric circuit modeling. The cathode-electrolyte …
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Understanding and Controlling the Magnetic and Optical Properties in van der Waals Semiconductors
… entirely new magnetic degree of freedom to vdW interfacial engineering. In this dissertation, we discuss the understanding and prediction of the magnetic and optical properties of vdW magnetic semiconductors employing ab initio methods alongside other theoretical and computational techniques. …
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Photoemission studies of interface effects on thin film properties
… substrates are shown to be determined by the interfacial conditions produced by the various Si-terminating metals (Au, Ag, In, and Pb), known as interfactants. These properties are probed experimentally with angle-resolved photoemission spectroscopy using vacuum ultraviolet synchrotron …
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Enhancing Stability in Quantum-Dot and Perovskite Optoelectronic Devices through Compositional Engineering and Surface Treatment
… In this thesis, I study how compositional engineering and surface treatment can address these stability challenges to increase durability at high efficiency. My investigation begins with stable, environment-friendly blue emitters for full-color displays. Vacancy-ordered double perovskites …
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Halide Perovskites for Photovoltaics and Light-Emitting Diodes
… transient PL measurements. Two typical interfacial engineering methods to improve the quality of halide perovskite and device performance are then presented. Optimised NiOx is adopted to improve the anode interface. From transient photovoltaic measurements, we find the charge collection …
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Physicochemical Interactions at Interfaces: Mass and Charge Transfer at Chemically Reacting Interfaces
… which undergo chemical reactions are crucial interfacial regions for most of human technology and are relevant for many large-scale industrial activities. Using rationally designed surfaces to enhance aqueous physicochemical interactions at these critical interfaces provides a unique approach …
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First Principles Studies of Magnetic Oxides, Spin-Driven Ferroelectricity, and the Effect of Polarization in the Chemistry of Functional Heterointerfaces
… properties inaccessible in the bulk; therefore, interfacial engineering of functional heterostructure geometries could guide devices by design. We propose the functional interface between graphene and polydomain ferroelectrics as platform for novel field effect transistors. Here, we present both …
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Molecular and active interfaces : controlling the adhesion of low surface tension fluids and solid microparticles
… will investigate several approaches that utilize interfacial engineering to control the wetting of low surface tension liquids and adhesion of solid microparticles on surfaces. While approaches to repel and control water are studied abundantly in the literature, we focus on low surface tension …
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Designer Porous Carbon Electrodes for Redox Flow Batteries
… materials. The second section advances the interfacial engineering of electrode surfaces. A synthetic method to generate dense and planar carbon films enables opportunities to extract fundamental rate constants on bottom-up designed materials using conventional electroanalytical approaches. …
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Efficient Drug and Nucleic Acid Delivery Systems based on Synthetic Amphiphiles with Tuned Oil/Water Interfaces
… selective stability with polymer structure and interfacial engineering mentioned above. The unique delivery capabilities of interfacial-engineered polymeric micelles were tested in vivo using a mouse model of triple negative breast cancer. We proved that our novel engineered triblock …
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Characterization framework to develop ball-milled thermites as additives to polymer-bound explosives
… the PBX. This suggests that nanoscale mixing, interfacial engineering, and optimized composite architecture play a dominant role in governing shock-driven reactions. Thus, the escalation of experimental complexity in this work, together with the detailed methodology at each stage, provides a …
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