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Showing 1 to 20 of 83 for “"Halide Perovskites"”.
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Microstructured Halide Perovskites for Energy Applications
Perovskites are cutting-edge materials that have demonstrated outstanding potential in the field of renewable energy. Their unique chemical-crystalline structure enables the easy substitution of atoms with various elements, allowing for a diverse range of optoelectronic properties that make them …
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Local structure of hybrid metal-halide perovskites
… op- toelectronic properties of the hybrid metal halide perovskite family MAPbX3 (MA+ = methylammonium, CH3NH+3 , X = Cl−, Br−). Static disorder was introduced by halide substitution through solid state synthesis, providing better stoichiometric control compared to solution based techniques. …
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Strain in Halide Perovskites: Characterisation, Crystallography, Consequences
… cells, LEDs, and X-ray detectors making use of halide perovskites as the light absorbing or emitting material have experienced a dramatic increase in efficiency in recent years. As a result, halide perovskite-based solar cells are now starting to make their way out of laboratories and into the …
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Microscale Energy Transport in Lead Halide Perovskites
… and design of semiconductor devices. Lead halide perovskites, an emerging semiconductor for optoelectronic applications, exhibits significant phenomena that can enhance or disrupt lateral energy transport, such as photon recycling and microscale heterogeneity. Understanding and quantifying …
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Development of Metal Halide Perovskites for Memristor Applications
… employed as the insulator layer. Among them, halide perovskites have drawn extensive attention owing to their superb physical and electronic properties, including ambipolar carries transport, low defect density, tunable bandgap, long diffusion length, and so on. In this thesis, halide …
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Synthetic exploration of halide perovskites and germanium semiconductors
<p>Halide perovskites and germanium semiconductors are promising materials for many optical applications such as solar cells and LEDs due to their unique photophysical properties. Compositional substitution and dimensional manipulation can enhance physical or chemical properties of perovskite and …
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Mixed Lead-Tin Halide Perovskites for Optoelectronic Applications
Mixed lead-tin (Pb-Sn) perovskites are unique materials in the family of halide perovskites. Unlike Pb perovskites, these mixed-metal systems can demonstrate bandgaps below 1.3 eV and are therefore essential constituents for low bandgap bottom subcell in all-perovskite tandem solar cells as well as …
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Halide Perovskites for Photovoltaics and Light-Emitting Diodes
Halide perovskite solar cells, with rapid efficiency improvements from ~10% to ~23% in 6 years, have attracted significant attention due to their remarkable performance, low processing cost and their potential to become a strong alternative candidate to silicon solar cells. Significant development …
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Fabricating and Tailoring Halide Perovskites for Photovoltaic Applications
… of potential solutions for the energy crisis. Halide perovskites are leading candidates to replace silicon in next generation solar cells. This thesis focuses on halide perovskite materials, aiming to understand their structure, electronic and ionic properties and photo-activity; and to …
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The effect of atmosphere on lead halide perovskites
Metal halide perovskites are exciting materials for low-cost optoelectronic devices such as solar cells and LEDs. At present, perovskite materials still suffer from substantial non-radiative decay, particularly under solar illumination conditions, and are therefore yet to reach their full …
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First Principle Modeling of Hybrid Halide Perovskites for Optoelectronic Applications
Halide perovskites (HP) are a promising material for use in solar cells and electronic devices, offering a comparable, less expensive alternative to current technologies. Devices with impressive optical and electronic properties are being made in the lab, but a robust theoretical understanding on …
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Charge Carrier Localisation in Metal Halide Perovskites for Optoelectronic Applications
… dynamics in semiconductors based on metal-halide perovskites. These materials have shown remarkable performance in optoelectronic applications like solar cells or light-emitting devices. They are solution-processable at low temperature using inexpensive earth-abundant reagents, have low …
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Rational Design of Novel Halide Perovskites Combining Computations and Experiments
… purposes. Among them, hybrid organic-inorganic perovskites (HOIPs) are very interesting and have been recently identified as possible next generation light harvesting materials because they combine low manufacturing cost and relatively high power conversion efficiencies (PCEs). In addition, some …
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Photophysics and optoelectronics of metal halide perovskites and other unconventional semiconductors
Metal Halide perovskites possess a unique set of properties, from the high absorption coefficient, the tunable bandgap and the high mobility to long range diffusion length. Impressive performances in photovoltaic applications, light-emitting diodes, lasers and photodetectors have shown the …
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Charge Carrier Dynamics of Lead Halide Perovskites Probed with Ultrafast Spectroscopy
… relaxation and recombination in a range of lead halide perovskites. We focus on understanding whether the photophysical behaviour of these perovskite materials is like that of highly-ordered inorganic crystalline semiconductors (exhibiting ballistic charge transport) or disordered molecular …
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Exploiting and Inhibiting Ion Migration to Control Luminescence in Halide Perovskites
… and structural changes of hybrid metal halide perovskites under light illumination or electric bias, and methods to exploit or inhibit these ion migration processes by implementation of effective passivation approaches. We first critically review recent studies on the photobrightening …
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Lithium-ion Battery Devices as a Method of Doping Metal Halide Perovskites
… in Chapter 4 considers Ruddlesden-Popper 2D/3D perovskites from an energy storage point of view. In doing so, the macroscopic lithiation processes that occur when a perovskite electrode is subjected to galvanostatic cycling are discussed. It is shown that a mixed 2D/3D phase optimises the …
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Exploring the Structural and Optical Response of Halide Perovskites Using High-Energy Electrons
… 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 perspective by understanding …
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Underlying Mechanisms of Halide Perovskites Properties and Metal Insulator Transitions in Vanadium Dioxide
Halide perovskites, as potential substitutes for silicon, stand out as one of the most promising photovoltaic materials for next-generation solar cells, owing to their superior properties such as high light-absorption ability, high carrier mobilities, easy synthesis, thin-film fabrication, and low …
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Pale black dot: a field trip to the multidimensional world of metal halide perovskites
Metal halide perovskites have recently emerged as promising alternatives to conventional semiconductors. However, their insufficient stability against external stressors continues to hinder their commercialisation. Here, we explore an additive-induced self-assembling two-dimensional capping layer …
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