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 “"optoelectronic materials"”.
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Static and Dynamic Disorder in Emerging Optoelectronic Materials
… the design and manufacturing of so-called optoelectronic devices. The resulting scientific narrative that emerging materials are bearers of novel technologies has led to the discovery of manifold new semiconducting material types which significantly differ from the above materials in …
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Machine Learning-aided High-throughput Synthesis and Development of Optoelectronic Materials
… techniques: MHPs have emerged as excellent optoelectronic materials, but despite seeing unprecedented research intensity in the last decade, only a small fraction of the available chemical space has been explored. In this thesis I present workflows to accelerate the discovery and …
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Novel ultra-violet/blue optoelectronic materials and devices based on copper halides (CuHa)
… out in the area of wide band gap semiconductor materials for light emission applications in the UV/Blue (300-400 nm) spectral range. This project explores the novel use of the Copper Halides (CuHa), specifically γ-CuCl and γ-CuBr, I–VII wide band gap mixed ionic–electronic semiconducting …
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Applications of emerging optoelectronic materials : lead sulphide quantum dots and steam cracker tar
Optoelectronics covers a wide and varied field of devices and applications, with many requiring different material properties for operation and manufacturing. In this thesis, I describe work performed over the course of my degree to improve the performance and understanding of various …
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Manipulation of ring strain and antiaromaticity in the design and synthesis of unique optoelectronic materials
Polycyclic aromatic hydrocarbons (PAHs) and fully-conjugated ladder polymers are leading candidates for organics electronics, as their inherent conformational rigidity encourages electron delocalization. Many of these systems consist of fused benzenoid or heterocyclic aromatic rings. Less …
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High quality optical and optoelectronic materials for efficient light management and solar spectrum control and conversion
Optoelectronic devices that effectively manipulate and manage light are of great interest in multiple fields, particularly in photovoltaics (PV) as a way to absorb and convert light into electricity. On the other hand, display technologies exploit optical materials and optoelectronics to …
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Ab initio study of nonlinear and vibrationally-controlled optoelectronic responses in semiconductors
Optoelectronic materials are an important driver of many modern technologies. These materials couple their interaction with light to their electronic properties in a range of—often tunable—ways. Responses such as generation of photocurrent from incident light or generation of light by electro- or …
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Exploring the Structural and Optical Response of Halide Perovskites Using High-Energy Electrons
… morphology, crystallography, composition, and optoelectronic structure of halide perovskites, a promising candidate for next-generation optoelectronic materials, using high-energy electron-beam microscopy techniques. This work addresses the stability challenge of PSCs from a material science …
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Synthesis and Characterisation of Singlet Fission and Open-Shell Materials for Optoelectronic Application
Indolonaphthyridine materials for singlet fission were systematically investigated. Firstly, cibalackrot was investigated as a singlet fission material. Single crystals of cibalackrot revealed insufficient electronic coupling was inhibiting singlet fission in the solid-state. A synthetically …
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Properties and Processing of Chalcogenide Perovskites
… photovoltaic (PV) technology that features low materials cost, high performance and reliability, and compatibility with low-cost manufacturing. Chalcogenide perovskite materials show promise to meet these criteria but are at an early stage of development. Other promising optoelectronic …
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In-Situ and Operando Multimodal Microscopy of Metal Halide Perovskite Optoelectronic Devices
Metal-halide perovskites are materials at the forefront of the next generation of optoelectronic materials. Of particular interest is their remarkable power conversion efficiencies when incorporated into thin film solar cells. The properties of next-generation semiconductors such as perovskites are …
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Microstructure and Electronic Structures of Er-Doped Si Nano-particles Synthesized by Vapor Phase Pyrolysis
Si nanoparticles are new prospective optoelectronic materials. Unlike bulk Si cry-stals, Si nanoparticles display intriguing room-temperature photoluminescence. A major challenge in the fabrication of Si nanoparticles is the control of their size distribution. The rare-earth element Er has unique …
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Phase Engineering and Optical Property Tuning of Transition Metal Dichalcogenides
… (Chapter 1), followed by an overview to the key materials and theoretical concepts in Chapter 2. In Chapter 3 we introduce in the key experimental methods used in the work. Chapter 4 examines the mechanism of semiconducting hexagonal (1H, 2H) to metallic tetragonal (1T, distorted 1T) phase …
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Advanced simulations of cross-linked thermoset and conjugated polymers for multifunctional applications
Polymers with diverse mechanical, thermal, and optoelectronic properties are essential for applications in flexible electronics, structural materials, and organic semiconductors. However, understanding the structure–property relationships of these materials remain challenging due to complex …
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To Couple or not to Couple? Exploring Vibronic Coupling in Organic Semiconductors
… profile. Despite these advantages, organic materials are fundamentally limited by how their excited states—excitons and polarons—interact with nuclear motion. In particular, vibronic coupling governs many key performance metrics, including emission linewidth, radiative efficiency, charge …
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Next generation optoelectronic devices for energy applications utilising metal oxides, bismuth oxyhalides and lead halide perovskites
Lead-halide perovskites (LHP) have rapidly emerged as a contender for commercial photovoltaic applications. Among its many advantages, one of the most important is that LHPs can be paired with silicon solar cells, which currently dominate the photovoltaics market. This is because LHP absorb in the …
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Microfluidic-based continuous self-assembly, alignment, and printing of oligopeptides with π-conjugated cores accompanied by advanced single molecule characterization
Organic semiconducting materials exist in an immense and complex space that,despite decades of extensive exploration, still has unexplored regions with exciting potential. The mysteries of this science lie in the myriad combinations in which organic building blocks can be arranged and how these …