scholarly journals A Comprehensive Strategy to Boost the Quantum Yield of Luminescence of Europium Complexes

2013 ◽  
Vol 3 (1) ◽  
Author(s):  
Nathalia B. D. Lima ◽  
Simone M. C. Gonçalves ◽  
Severino A. Júnior ◽  
Alfredo M. Simas
Keyword(s):  
Quantum Yield ◽  
Europium Complexes ◽  
Comprehensive Strategy ◽  
Quantum Yield Of Luminescence

Effects of electron-withdrawing groups in imidazole-phenanthroline ligands and their influence on the photophysical properties of EuIII complexes for white light-emitting diodes

2017 ◽  
Vol 41 (18) ◽  
pp. 9826-9839 ◽  
Author(s):  
Boddula Rajamouli ◽  
Rachna Devi ◽  
Abhijeet Mohanty ◽  
Venkata Krishnan ◽  
Sivakumar Vaidyanathan
Keyword(s):  
Thin Film ◽  
Quantum Yield ◽  
White Light ◽  
Light Emitting Diode ◽  
Photophysical Properties ◽  
Red Light ◽  
Europium Complexes ◽  
Light Emitting ◽  
White Light Emitting Diodes ◽  
Phenanthroline Ligands

The red light emitting diode (LED) was fabricated by using europium complexes with InGaN LED (395 nm) and shown digital images, corresponding CIE color coordinates (red region) as well as obtained highest quantum yield of the thin film (78.7%).

Concentration dependence of the quantum yield of luminescence of Tm3+ ions in gadolinium oxychloride

2004 ◽  
Vol 71 (6) ◽  
pp. 829-836
Author(s):  
T. M. Kozhan ◽  
V. V. Kuznetsova ◽  
P. P. Pershukevich ◽  
I. I. Sergeev ◽  
V. S. Khomenko ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Concentration Dependence ◽  
Quantum Yield Of Luminescence

scholarly journals Quantitative express estimation of humine and fulvo acids content in aqueous solutions by photo-stimulated luminescence

2018 ◽  
Keyword(s):  
Quantum Yield ◽  
Dynamic Range ◽  
Light Flux ◽  
Low Noise ◽  
Light Sources ◽  
Colloidal Systems ◽  
Colloidal Solutions ◽  
Measuring Device ◽  
Light Emitting ◽  
Quantum Yield Of Luminescence

The work substantiates the expediency of using the methods of recording the quantum yield of luminescence of humic and folic compounds in the process of determining the relative concentrations of these substances in aqueous and colloidal solutions. The efficiency of using modern high-power ultraviolet semiconductor light sources with high monochromaticity of light flux has been proved, followed by the registration of reviews of the samples under investigation with the help of a low-noise semiconductor photodetector with a connected operational amplifier, which allows to provide a wide dynamic range of current and voltage measurements. The subject of the study is the process of recording the quantitative and qualitative parameters of the se- lected chemical compounds in colloidal systems in the liquid phase developed in the course of research by the model of the measuring instrument. The novelty of the work is to improve the classical methods for recording the quantum yield of lumines- cence, using a modern element base and testing the model of a measuring device with powerful ultraviolet light-emitting diodes as a light source and low-noise photodetector with a clear dynamic range designed for recording the quantum yield of luminescence of the samples under investigation.

Quantum yield of luminescence of Ag nanoclusters dispersed within transparent bulk glass vs. glass composition and temperature

2012 ◽  
Vol 101 (25) ◽  
pp. 251106 ◽  
Author(s):  
A. S. Kuznetsov ◽  
J. J. Velázquez ◽  
V. K. Tikhomirov ◽  
J. Mendez-Ramos ◽  
V. V. Moshchalkov
Keyword(s):  
Quantum Yield ◽  
Glass Composition ◽  
Bulk Glass ◽  
Quantum Yield Of Luminescence ◽  
Ag Nanoclusters

scholarly journals Влияние полимерной матрицы на люминесцентные свойства композиций, допированных хелатами бора

2019 ◽  
Vol 127 (9) ◽  
pp. 425
Author(s):  
Е.В. Федоренко ◽  
А.А. Хребтов ◽  
А.Г. Мирочник ◽  
П.С. Нефедов ◽  
Л.А. Лим ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Quantum Yield ◽  
Polymethyl Methacrylate ◽  
Maximum Quantum Yield ◽  
Quantum Yield Of Luminescence ◽  
Phenyl Rings ◽  
Boron Difluoride

Polymer luminescent compositions based on polystyrene (PS), polycarbonate (PC) and polymethyl methacrylate (PMMA) doped with boron difluoride dibenzoylmethanate (DBMBF2), boron difluoride anthracenoylacetonate (AntAcBF2) and their mixture were investigated. Composition based on PS has a maximum quantum yield of luminescence. The role of PS in increasing the efficiency of energy transfer from the donor (DBMBF2) to the acceptor (AntAcBF2) is revealed, which is due to the formation of exciplexes between DBMBF2 and phenyl rings of PS.

scholarly journals Factors Affecting the Efficiency of Excited-States Interactions of Complexes between Some Visible Light-Emitting Lanthanide Ions and Cyclophanes Containing Spirobiindanol Phosphonates

2007 ◽  
Vol 2007 ◽  
pp. 1-7 ◽  
Author(s):  
M. S. Attia ◽  
M. M. H. Khalil ◽  
Ayman A. Abdel-Shafi ◽  
G. M. Attia ◽  
Salvatore Failla ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Visible Light ◽  
Excited States ◽  
Photophysical Properties ◽  
Lanthanide Ions ◽  
Luminescence Quantum Yield ◽  
Europium Complexes ◽  
Factors Affecting ◽  
Light Emitting ◽  
Yield Values

The efficiency of excited-states interactions between lanthanide ionsTb3+andEu3+and some new cyclophanes (I, II, and III) has been studied in different media. High luminescence quantum yield values for terbium and europium complexes in DMSO and PMMA were obtained. The photophysical properties of the green and red emissiveTb3+andEu3+complexes have been elucidated, respectively.

scholarly journals Multiligand Europium Complexes Incorporated Polyvinylpyrrolidone for Enhanced Solar Cell

2019 ◽  
Vol 2019 ◽  
pp. 1-13 ◽  
Author(s):  
Zhimin Yu ◽  
Jing Guo ◽  
Desheng Li ◽  
Hai Lin
Keyword(s):  
Thin Films ◽  
Solar Cell ◽  
Quantum Yield ◽  
Fluorescence Emission ◽  
Total Emission ◽  
Europium Complexes ◽  
Orange Fluorescence ◽  
Photon Conversion ◽  
Uv Visible ◽  
Reddish Orange

Intense reddish-orange fluorescence of Eu3+ is observed in multiligand europium complexes Eu(BA)(TTA)2 and Eu(BA)(TTA)2Phen doped polyvinylpyrrolidone (PVP). Under 367 nm UVA-LED pumping with 708.5 μW, the net emission powers are as high as 204.8 and 243.2 μW, and the total emission photon numbers are derived to be 635.9 × 1012 and 754.9 × 1012 cps for Eu(BA)(TTA)2 and Eu(BA)(TTA)2Phen doped PVP thin films, respectively. It is incredible that the quantum yield (QY) is up to 57.87% in the former; furthermore, as the introduction of Phen, the QY of Eu3+ is increased to 62.03%, verifying the effectiveness of multiligands in photon conversion. Conclusive photon quantification and efficient fluorescence emission reveal the potential of europium complexes/PVP as UV-visible conversion layers for enhanced solar cells.

Quantum yield of luminescence from europium and terbium ions in complex compounds containing different ligands

1976 ◽  
Vol 24 (2) ◽  
pp. 189-192
Author(s):  
N. S. Polu�ktov ◽  
I. I. Zheltvai ◽  
G. I. Gerasimenko ◽  
M. A. Tishchenko ◽  
A. A. Kucher
Keyword(s):  
Quantum Yield ◽  
Complex Compounds ◽  
Quantum Yield Of Luminescence
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