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Showing 1 to 20 of 73 for “"halide perovskite"”.
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Patterning Tri-Halide Perovskite Single Crystal Growth
Organic perovskites have been growing in the field of organic electronics, and lately field-effect transistors with single-crystalline perovskites have received more attention, because they should have ideal field-effect mobility and new crystal growth techniques have made them easier to …
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Quantum-confined Inorganic-organic Lead Halide Perovskite
Inorganic-organic hybrid perovskites have been regarded as one of the most distinctive next-generation luminescence materials due to their advanced properties. This thesis describes our study of confining inorganic-organic hybrid perovskites with nanoporous gallium nitride (GaN) matrix and with …
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Self-assembly of lead-halide-perovskite laser particles
… of samples. In the thesis, I investigated lead halide perovskites (LHP) as a novel material for scalable production of laser particles in a lab flask. I discovered a sonochemical method to produce a large quantity (10 billions/L) of high-quality LHP micro- and sub-micron particles in a polar …
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Characterization and application of Pb-based organometal halide perovskite
… a novel materials system, namely organometal trihalide perovskite, that is currently receiving considerable attention as light absorber in solar cells, due to the promise to obtain significant improvements in the efficiency of solar cells fabricated with very low cost, scalable techniques. The …
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Stability study in lead-halide perovskite light-emitting diodes
The metal halide perovskite group of materials not only have led to great advances in photovoltaics, but also have shown great potential in light emitting applications. Other than energy efficiency and brightness, perovskite emitters have advantages such as high colour saturation and low processing …
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Magneto-Optical Effects in Manganese-doped Lead Halide Perovskite
… over exciton-dopant interactions. Hybrid metal-halide perovskites are a new class of high-performance solution-processable semiconductors which combine remarkable optoelectronic performance with tolerance to structural defects and impurities. This thesis demonstrates magnetic doping of lead …
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Charge and Thermoelectric Transport in Metal Halide Perovskite Semiconductors
Metal halide perovskites exhibit optoelectronic properties that hold significant potential for applications in photovoltaics, light-emitting diodes, photodetectors, X-ray detectors, and field-effect transistors (FETs). Rapid and substantial enhancements in the performance of perovskite-based …
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Charge Carrier Relaxation in Halide Perovskite Semiconductors for Optoelectronic Applications
Lead halide perovskites have shown remarkable device performance in both solar cells and LEDs. Whilst the research efforts so far have been mainly focussed on device optimisation, little is known about the photophysical properties. For example, the nature of the bandgap is still debated and an …
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Charge Carrier Balance in Lead Halide Perovskite Light Emitting Diodes
… simulations to study the charge balance in Lead Halide Perovskite (LHP) emitter LEDs. These LHP LEDs, particularly Near-Infrared Emitters have demonstrated high EQE, and promising lifetime.However for many other emission wavelengths their performance and endurance is lacking. I first present a …
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Halide Perovskite and Perovskite-Inspired Light Emitters: Synthesis and Optical Spectroscopy
… are necessary to achieve this goal. Lead halide perovskites have in the past decade shown themselves to be a promising, novel solar cell technology, with efficiencies beyond 25 %. Lead halide perovskites cannot only harvest but also emit light very efficiently and could thereby increase …
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Halide Perovskite and Metal-Organic Framework Composites for X-ray Detection
… families of materials with unique properties, halide perovskites and metal-organic frameworks are brought together for the first time, in a sol-gel processable, monolithic manner and utilised to advance the development of novel X-ray detector materials. Utilising the exceptional optoelectronic …
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Chemical Modifications and Passivation Approaches in Metal Halide Perovskite Solar Cells
… passivated and chemically modified hybrid metal halide perovskite materials and development of highly efficient charge transport layers for perovskite solar cells. We first developed an efficient electron transport layer via modification of titanium dioxide nanostructure followed by a unique …
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Fabrication of solution-processed photoactive polymer- and halide perovskite-based solar cells
… structures have been employed to produce perovskite-based solar cells using one and two step spin coating methods (OSSCM & TSSCM). Thorough investigations of controlling the morphology of the perovskite films have been carried out using low-temperature processing methods. It was found that …
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Continuous synthesis of metal halide perovskite nanoparticles with sharp and stable emission
Metal halide perovskite nanoparticles present unique and attractive optical and electronic properties, leading to promising application in optoelectronic devices such as light-emitting diodes and solar cells. The optical properties of metal halide perovskite nanoparticles are tuneable by size, …
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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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Development of colloidal quantum dot and lead halide perovskite light emitting devices
… molecules, colloidal quantum dots (QDs) and lead halide perovskites, have emerged as top candidates for light emitting materials. One key feature of these materials is their bandgap tunability, e.g. via size or chemical composition, allowing for their emission color to be turned throughout the …
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Development and Characterisation of Halide Perovskite Visible Light and X-Ray Detection Devices
… In this thesis, the unique properties of metal halide perovskites are utilised to advance both visible light and Xray detectors. However, other properties of perovskites, such as ion migration, can provide challenges when characterising performance, and so techniques to accurately measure their …
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On-Site Synthesis of Halide Perovskite Nanocrystals with Sub-50 nm Positional Accuracy
Metal halide perovskites comprise a promising class of semiconductors with broad applications ranging from optoelectronics and photovoltaics to photocatalysis. To extend these applications to on-chip devices, on-site growth of perovskite nanocrystals with high positional accuracy must be achieved. …
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Spatially Resolved Charge Transport and Recombination in Metal-Halide Perovskite Films and Solar Cells
Metal-halide perovskites show great promise as solution-processable semiconductors for efficient solar cells and LEDs. In particular, the diffusion range of photogenerated carriers is unexpectedly long and the luminescence yield is remarkably high. While much effort has been made to improve device …
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Exciton Dynamics and Optical Properties of Lead Halide Perovskite Nanocrystals: From Nanorods to Nanocubes
Lead halide perovskites, particularly CsPbBr3, have emerged as leading light emitters for their spectral purity, brightness, and facile synthesis. Their soft, ionic lattice makes them unusually defect tolerant but introduces problems with stability. Additionally, dephasing mechanisms and coupling …
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