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Nonradiative Relaxation and Luminescent Properties of Upconversion YVO4:Yb,Er Nanoparticles
AbstractA theoretical study is performed of the dependence of the upconversion luminescence spectrum of YVO 4 :Yb,Er nanoparticles on the rate of...
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Measurement of the Lifetime and of the Spin-Relaxation Time of Electrons in Semiconductors by the Optical-Orientation Method
It was shown recently [1, 2] that in semiconducting crystals it is possible to attain an appreciable orientation of the spins of the non-equilibrium...
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Ultrafast hole relaxation dynamics in quantum dots revealed by two-dimensional electronic spectroscopy
Elucidating the population dynamics of correlated electron-hole pairs (bound excitons) in semiconducting quantum dots (QDs) is key for develo** our...
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Near infrared emissions from both high efficient quantum cutting (173%) and nearly-pure-color upconversion in NaY(WO4)2:Er3+/Yb3+ with thermal management capability for silicon-based solar cells
Raising photoelectric conversion efficiency and enhancing heat management are two critical concerns for silicon-based solar cells. In this work,...
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Kinetics of Induced Absorption of Multiatomic Molecules during Two-Photon Excitation
AbstractThe kinetics of triplet—triplet absorption of multiatomic molecules (by the example of halogen-substituted of fluorescein, i.e., eosin and...
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Surface-Plasmon Relaxation Effects
In the previous chapter, we carefully introduced the EM properties of surface plasmons. Both SPPs and LSPs can be seen as collective electronic...
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Analysis of contributions of electron-phonon relaxation and recombination processes to silicon heating by femtosecond laser pulse
The paper presents the results of numerical modeling the multistage heating dynamics for monocrystalline silicon under the influence of a femtosecond...
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Summary and Concluding Remarks
We have considered the formation of the positive ion of antihydrogen via radiative and nonradiative attachment of an incident positron to an...
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Nanoassemblies Based on Semiconductor Quantum Dots and Porphyrin Molecules: Structure, Exciton–Phonon Interactions, and Relaxation Processes
Experimental temperature dependences (77–293 K) of absorption and photoluminescence spectra of CdSe/ZnS semiconductor quantum dots (QDs) were...
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Effect of copper do** on the lifetime of the upper 5T2 laser level of the iron ion in ZnSe
The effect of copper do** of ZnSe:Fe crystals on the kinetics of luminescence of iron ions is investigated in this work. It has been discovered...
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Energy Spectrum in a Shallow GaAs/AlGaAs Quantum Well Probed by Spectroscopy of Nonradiative Broadening of Exciton Resonances
AbstractThe energy spectrum of the exciton and carrier states in a shallow GaAs/AlGaAs quantum well is experimentally studied by means of the...
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Anharmonic multi-phonon nonradiative transition: An ab initio calculation approach
Nonradiative carrier recombinations at deep centers in semiconductors are of great importance for both fundamental physics and device engineering. In...
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Extending the dynamic temperature range of Boltzmann thermometers
Lanthanide-doped (nano)crystals are an important class of materials in luminescence thermometry. The working mechanism of these thermometers is...
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Carrier Recombination and Noise
In steady state, for each act of carrier generation or excitation there must be one inverse process of recombination or relaxation. Carriers can...
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Piezoelectric Relaxation of Two-Dimensional Electron Gas in Heterostructures with InGaN/GaN Quantum Wells
The article is devoted to the study of the mechanism of piezoelectric scattering of charge carriers in InGaN/AlGaN/GaN heterostructures with one...
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Manifestation in IR-Luminescence of Cross Relaxation Processes between NV-Centers in Weak Magnetic Fields
The effect of a magnetic field on the luminescence from an ensemble of NV-centers in diamond was studied experimentally and theoretically. It was...
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Effect of the Introduction of a Chlorine Atom into the Aromatic Fragment of the 1,3-Diketone Ligand on the Luminescence Efficiency of Novel Eu3+ Ion Coordination Compounds
A study was carried out on the effect of a heavy chlorine atom introduced into the aromatic fragment of a 1,3-diketone ligand in Eu 3+ coordination...
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Effect of the Spherical Nanoparticle with a Metal Shell on Deactivation of the Excited Quantum Dot
The plasmon-exciton interaction between a spherical nanoparticle with a dielectric core and a metal shell and a quantum dot in the mode of strong or...
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Effect of Nonradiative Transitions on the Upconversion Properties of YVO4:Yb, Er Nanoparticles
AbstractThe results from a comparative analysis of the emission spectra of upconversion YVO 4 :Yb, Er nanoparticles synthesized in sizes ranging from...
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Evolution of the Luminescence Properties of Single CsPbBr3 Perovskite Nanocrystals During Photodegradation
The evolution of the luminescence blinking of single CsPbBr 3 perovskite nanocrystals with a characteristic size of ~25 nm during photodegradation has...
