Specific absorption in Y3Al5O12:Eu ceramics and the role of stable Eu2+ in energy transfer processes

Several sets of Eu-doped Y3Al5O12 (YAG) ceramic samples were synthesized by the vacuum sintering technique. Absorption bands at 250, 370 and 550 nm in samples were attributed to the charge transfer transition in the EuY2+ + F+ pair center.

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Beyond Charge Transfer: The Impact of Auger Recombination and FRET on PL Quenching in an rGO-QDs System

Nanomaterials ◽

10.3390/nano11061623 ◽

2021 ◽

Vol 11 (6) ◽

pp. 1623

Author(s):

Anton A. Babaev ◽

Anastasiia V. Sokolova ◽

Sergei A. Cherevkov ◽

Kevin Berwick ◽

Alexander V. Baranov ◽

...

Keyword(s):

Energy Transfer ◽

Charge Transfer ◽

Auger Recombination ◽

Substantial Reduction ◽

Component Ratio ◽

Transfer Processes ◽

Graphene Derivatives ◽

The Impact ◽

Pl Quenching

PL intensity quenching and the PL lifetime reduction of fluorophores located close to graphene derivatives are generally explained by charge and energy transfer processes. Analyzing the PL from PbS QDs in rGO/QD systems, we observed a substantial reduction in average PL lifetimes with an increase in rGO content that cannot be interpreted solely by these two processes. To explain the PL lifetime dependence on the rGO/QD component ratio, we propose a model based on the Auger recombination of excitations involving excess holes left in the QDs after the charge transfer process. To validate the model, we conducted additional experiments involving the external engineering of free charge carriers, which confirmed the role of excess holes as the main QD PL quenching source. A mathematical simulation of the model demonstrated that the energy transfer between neighboring QDs must also be considered to explain the experimental data carefully. Together, Auger recombination and energy transfer simulation offers us an excellent fit for the average PL lifetime dependence on the component ratio of the rGO/QD system.

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Electrochemiluminescence Study of Europium (III) Complex with Coumarin3-Carboxylic Acid

International Journal of Photoenergy ◽

10.1155/2008/131702 ◽

2008 ◽

Vol 2008 ◽

pp. 1-6 ◽

Cited By ~ 9

Author(s):

Stefan Lis ◽

Krzysztof Staninski ◽

Tomasz Grzyb

Keyword(s):

Aqueous Solution ◽

Spectral Analysis ◽

Energy Transfer ◽

Solid State ◽

Carboxylic Acid ◽

Elemental Analysis ◽

Aluminium Electrode ◽

The Eu

The europium (III) complex of coumarin-3-carboxylic acid (C3CA) has been prepared and characterized on the basis of elemental analysis, IR, and emission (photoluminescence and electrochemiluminescence) spectroscopy. The synthesised complex having a formula Eu was photophysically characterized in solution and in the solid state. Electrochemiluminescence, ECL, of the system containing the Eu(III)/C3CA complex was studied using an oxide-covered aluminium electrode. The goal of these studies was to show the possibility of the use of electrochemical excitation of the Eu(III) ion in aqueous solution for emission generation. The generated ECL emission was very weak, and therefore its measurements and spectral analysis were carried out with the use of cut-off filters method. The studies proved a predominate role of the ligand-to-metal energy transfer (LMET) in the generated ECL.

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Horizontal versus vertical charge and energy transfer in hybrid assemblies of semiconductor nanoparticles

Beilstein Journal of Nanotechnology ◽

10.3762/bjnano.3.72 ◽

2012 ◽

Vol 3 ◽

pp. 629-636 ◽

Cited By ~ 7

Author(s):

Gilad Gotesman ◽

Rahamim Guliamov ◽

Ron Naaman

Keyword(s):

Energy Transfer ◽

Charge Transfer ◽

Horizontal Plane ◽

Quartz Substrate ◽

Vertical Direction ◽

Time Resolved ◽

Transfer Processes ◽

Donor And Acceptor ◽

Hybrid Assemblies ◽

Time Resolved Photoluminescence

We studied the photoluminescence and time-resolved photoluminescence from self-assembled bilayers of donor and acceptor nanoparticles (NPs) adsorbed on a quartz substrate through organic linkers. Charge and energy transfer processes within the assemblies were investigated as a function of the length of the dithiolated linker (DT) between the donors and acceptors. We found an unusual linker-length-dependency in the emission of the donors. This dependency may be explained by charge and energy transfer processes in the vertical direction (from the donors to the acceptors) that depend strongly on charge transfer processes occurring in the horizontal plane (within the monolayer of the acceptor), namely, parallel to the substrate.

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Charge transfer excitation processes in analytical glow discharges – A review

Journal of Analytical Atomic Spectrometry ◽

10.1039/d0ja00001a ◽

2020 ◽

Vol 35 (9) ◽

pp. 1814-1826 ◽

Cited By ~ 3

Author(s):

Sohail Mushtaq

Keyword(s):

Charge Transfer ◽

Current Status ◽

Transfer Processes ◽

Glow Discharges ◽

Charge Transfer Excitation ◽

Excitation Processes

This review summarizes the current status and the latest developments in understanding the role of various charge transfer processes in analytical glow discharges.

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