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This book reports on the derivation, implementation and application of two-component methods in the framework of time-dependent density functional theory. These methods allow the calculation of electronic transitions as well as the calculation of the correlation contribution to the electronic ground-state energy (RPA) and to the orbital energies (GW) including spin-orbit coupling. The focus of the applications is put on organic light-emitting diodes and clusters of heavy metals.

Spin-Bahn-Kopplung --- MetallclusterSpin-orbit coupling --- Time-dependent density functional theory --- Organic light-emitting diodes --- Zeitabhängige Dichtefunktionaltheorie --- Metal clusters --- Organische Leuchtdioden

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This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact

Organic light-emitting diodes --- Fluorescence materials --- Thermally activated delayed fluorescence --- hybridized local and charge-transfer state --- Aggregation-induced emission --- Donor-acceptor exciplex emitters

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This book, a collection of 12 original contributions and 4 reviews, provides a selection of the most recent advances in the preparation, characterization, and applications of polymeric nanocomposites comprising nanoparticles. The concept of nanoparticle-reinforced polymers came about three decades ago, following the outstanding discovery of fullerenes and carbon nanotubes. One of the main ideas behind this approach is to improve the matrix mechanical performance. The nanoparticles exhibit higher specific surface area, surface energy, and density compared to microparticles and, hence, lower nanofiller concentrations are needed to attain properties comparable to, or even better than, those obtained by conventional microfiller loadings, which facilitates processing and minimizes the increase in composite weight. The addition of nanoparticles into different polymer matrices opens up an important research area in the field of composite materials. Moreover, many different types of inorganic nanoparticles, such as quantum dots, metal oxides, and ceramic and metallic nanoparticles, have been incorporated into polymers for their application in a wide range of fields, ranging from medicine to photovoltaics, packaging, and structural applications.

graphene oxide --- n/a --- latex compounding method --- gold nanoparticles --- ratiometric temperature sensing --- catalysis --- conjugated polymer nanoparticles --- carrier transport --- polymer-NP interface --- nanocomposites --- polyethylene --- structure-property relationship --- chemical and physical interface --- SiO2/TiO2 nanocomposite --- nanoparticles --- separation --- conductive polymer --- clays --- organic light-emitting diodes (OLEDs) --- nanocomposite --- molecular chain motion --- nanosheets --- morphology --- metal oxides --- hybrid hydrogels --- gas barrier properties --- nanomaterials --- in situ synthesis --- mechanical properties --- power cable insulation --- inorganic nanotubes --- surface modification of silica --- optoelectronic properties --- layered structures --- sol–gel --- nano-hybrids --- fluorescent assay --- N-isopropylacrylamide --- bismaleimide --- electrical property --- solar cell --- N-isopropylmethacrylamide --- SiO2 microspheres --- PFO/MEH-PPV hybrids --- power-conversion efficiency --- in-situ synthesis --- electrical breakdown --- active layer --- crystallization kinetics --- polypropylene nanocomposite --- electric energy storage --- silver ions --- composite membrane --- carbon nanoparticles --- graphene --- composites --- electrode --- reduced graphene oxide --- selective adsorption --- thermoresponsive hyperbranched polymer --- colorimetric sensor --- FRET --- polymers --- graphene-like WS2 --- polymer-matrix composites --- thermoplastic nanocomposite --- fluorescence resonance energy transfer --- PHBV --- melamine --- Ag nanoparticles --- adhesion --- chain topology --- interfacial layer --- silica/NR composite --- sol-gel

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Significant progress has been made in nanophotonics and the use of nanostructured materials for optoelectronic devices, including light-emitting diodes (LEDs) and laser diodes, which have recently attracted considerable attention due to their unique geometry. Nanostructures in small dimensions, comprising nanowires, nanotubes, and nanoparticles, etc,. can be perfectly integrated into a variety of technological platforms, offering novel physical and chemical properties for high-performance, light-emitting devices. This Special Issue aims to present the most recent advances in the field of nanophotonics, which focuses on LEDs and laser diodes. We invite contributions of original research articles, as well as review articles that are aligned to the following topics that include, but are not limited to, thetheoretical calculation, synthesis, characterization, and application of such novel nanostructures for light-emitting devices. The application of nanostructured light-emitters in general lighting, imaging, and displays is also highly encouraged.

History of engineering & technology --- Liquid phase deposition method --- InGaN/GaN light-emitting diode --- silver nanoparticle --- zinc oxide --- localized surface plasmon --- β-Ga2O3 --- III-Nitrides --- monoclinic --- hexagonal arrangement --- high-power --- current distribution --- vertical structure LED --- blue organic light emitting diodes --- transport materials --- host-dopant --- nanoparticles --- luminescence --- non-stoichiometric ZnxAgyInS1.5+x+0.5y nanocrystals --- photoluminescence properties --- tunable fluorescence emission --- one-pot approach --- perovskite light-emitting diodes --- three-step spin coating --- hole transport layer --- PEDOT:PSS/MoO3-ammonia composite --- μLED displays --- μLEDs --- GaN nanowires --- core-shell structure --- ultraviolet (UV) emitter --- surface plasmon --- Pt nanoparticles --- hole-pattern --- photon emission efficiency --- distributed Bragg reflectors --- gratings --- GaN-based lasers --- linewidth --- epsilon-near-zero --- wideband absorber --- plasmon mode --- Brewster mode --- visible light communication --- photonic crystals --- flip-chip LED --- Purcell effect --- light extraction efficiency --- nanostructured materials --- surface/interface properties --- nanostructured light-emitting devices --- physical mechanism --- surface/interface modification --- surface/interface control --- micro-scale light emitting diode --- sapphire substrate --- encapsulation --- compound semiconductor --- nanostructure --- ultraviolet --- light-emitting diode (LED) --- molecular beam epitaxy --- GaN --- AlN --- photonic nanojet --- photonic nanojet array --- self-assembly --- template-assisted self-assembly --- patterning efficiency --- III-nitride thin film --- nanostructures --- ultraviolet emitters --- surface passivation --- luminescence intensity --- n/a

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Significant progress has been made in nanophotonics and the use of nanostructured materials for optoelectronic devices, including light-emitting diodes (LEDs) and laser diodes, which have recently attracted considerable attention due to their unique geometry. Nanostructures in small dimensions, comprising nanowires, nanotubes, and nanoparticles, etc,. can be perfectly integrated into a variety of technological platforms, offering novel physical and chemical properties for high-performance, light-emitting devices. This Special Issue aims to present the most recent advances in the field of nanophotonics, which focuses on LEDs and laser diodes. We invite contributions of original research articles, as well as review articles that are aligned to the following topics that include, but are not limited to, thetheoretical calculation, synthesis, characterization, and application of such novel nanostructures for light-emitting devices. The application of nanostructured light-emitters in general lighting, imaging, and displays is also highly encouraged.

History of engineering & technology --- Liquid phase deposition method --- InGaN/GaN light-emitting diode --- silver nanoparticle --- zinc oxide --- localized surface plasmon --- β-Ga2O3 --- III-Nitrides --- monoclinic --- hexagonal arrangement --- high-power --- current distribution --- vertical structure LED --- blue organic light emitting diodes --- transport materials --- host-dopant --- nanoparticles --- luminescence --- non-stoichiometric ZnxAgyInS1.5+x+0.5y nanocrystals --- photoluminescence properties --- tunable fluorescence emission --- one-pot approach --- perovskite light-emitting diodes --- three-step spin coating --- hole transport layer --- PEDOT:PSS/MoO3-ammonia composite --- μLED displays --- μLEDs --- GaN nanowires --- core-shell structure --- ultraviolet (UV) emitter --- surface plasmon --- Pt nanoparticles --- hole-pattern --- photon emission efficiency --- distributed Bragg reflectors --- gratings --- GaN-based lasers --- linewidth --- epsilon-near-zero --- wideband absorber --- plasmon mode --- Brewster mode --- visible light communication --- photonic crystals --- flip-chip LED --- Purcell effect --- light extraction efficiency --- nanostructured materials --- surface/interface properties --- nanostructured light-emitting devices --- physical mechanism --- surface/interface modification --- surface/interface control --- micro-scale light emitting diode --- sapphire substrate --- encapsulation --- compound semiconductor --- nanostructure --- ultraviolet --- light-emitting diode (LED) --- molecular beam epitaxy --- GaN --- AlN --- photonic nanojet --- photonic nanojet array --- self-assembly --- template-assisted self-assembly --- patterning efficiency --- III-nitride thin film --- nanostructures --- ultraviolet emitters --- surface passivation --- luminescence intensity