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Showing 1 to 14 of 14 for “"Hybrid perovskites"”.
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Photophysics of Hybrid Perovskites with Electroactive Molecules
Incorporating π-conjugated organic cations into hybrid organic–inorganic perovskites offers a compelling strategy to unlock new optoelectronic functionalities by mediating the interaction between molecular orbitals and the inorganic lattice bands. Whereas conventional perovskites rely on …
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Electronic Structure Based Investigations of Hybrid Perovskites and Their Nanostructures
<p>Perovskites are a category of semiconductors with outstanding optoelectronic properties. Especially in the last decades, three-dimensionally connected (“3D”) hybrid perovskites gained an important position as an innovative solar-cell material by including organic cations. Related molecularly …
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Investigations on Organic Vertical Transistors and Defect Minimization in Hybrid Perovskites
The investigations on organic semiconductors and organometal halide perovskite (OHP) semiconductors have enabled tremendous research achievements for low cost, high performance, flexible optoelectronic applications such as light emitting diodes (LED), photovoltaics (PV) and field effect transistors …
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Investigation of Instability of a Single Crystal Organic –Inorganic Hybrid Perovskites Used for Photovoltaic Solar Application.
… of efficient and reliable materials. Halide hybrid perovskites as a single crystal have been shown to efficient materials for photonic applications which include photovoltaic devices and photodetectors. However, the research lacks understanding of stability mechanisms of these materials under …
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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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Synthesis, characterization and properties of hybrid organic - inorganic perovskites for photovaltaic applications
The hybrid organic-inorganic perovskites (HOIPs), e.g. methylammonium and formamidinium lead halide (MA/FAPbX3, X = I, Br or Cl), are a class of materials that has recently achieved remarkable performances in photovoltaic applications. This thesis describes the synthesis, structure and properties …
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Ab initio study of nonlinear and vibrationally-controlled optoelectronic responses in semiconductors
… materials. Then, we turn our attention to hybrid organic-inorganic perovskites, which are a class of materials well known for their excellent optoelectronic performance. The presence of organic components in these materials lends a high degree of tunability and leads to complex dynamical …
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Rational Design of Novel Halide Perovskites Combining Computations and Experiments
… materials for different 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 …
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Optical hot carrier solar cell: A general method of spectrum management in photovoltaics
… A stronger phonon bottleneck effect was shown in hybrid perovskites than in their inorganic counterparts to prolong the carrier cooling period. At least a 10 times slower carrier-phonon relaxation rate was observed in FAPbb comparing to the cesium-based inorganic system. The up-conversion of …
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Static and Dynamic Disorder in Emerging Optoelectronic Materials
… semiconductors and to all-inorganic as well as hybrid perovskites. This work looks into some of these novel materials, focusing on the role of structure as well as static and dynamic disorder on the optoelectronic properties using first-principles electronic structure theory. We first …
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Control of chiral optical and spin properties in low-dimensional perovskites
… (3D) to two-dimensional (2D) metal halide perovskites represents a paradigm shift that expands the chemical space, introducing new variables such as metal species, enantiomers, and ionic compositions for property engineering. While 3D perovskites are constrained by geometric tolerance …
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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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Absorption and emission processes in organometal trihalide perovskites
… processed semiconductors, organometal halide perovskites represent a noteworthy class of materials thanks to their unique combination of optoelectronic properties: efficient charge transport, favorable emission properties, strong light absorption and optical gap tunability stand for the key …
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Local structure of hybrid metal-halide perovskites
… structure and 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 …