Optical emission studies of new europium and terbium dinuclear complexes with trifluoroacetylacetone and bridging bipyrimidine. Fast radiation and high emission quantum yield

Polyhedron ◽  
2015 ◽  
Vol 102 ◽  
pp. 16-26 ◽  
Author(s):  
Rashid Ilmi ◽  
Khalid Iftikhar
Keyword(s):  
Quantum Yield ◽  
Optical Emission ◽  
Dinuclear Complexes ◽  
High Emission ◽  
Emission Studies ◽  
Emission Quantum Yield

Lighting up Eu3+ luminescence through remote sensitization in silica nanoarchitectures

2018 ◽  
Vol 6 (28) ◽  
pp. 7479-7486 ◽  
Author(s):  
Flavia Artizzu ◽  
Danilo Loche ◽  
Dimitrije Mara ◽  
Luca Malfatti ◽  
Angela Serpe ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Quantum Yield ◽  
Efficient Energy Transfer ◽  
Efficient Energy ◽  
High Emission ◽  
Fast Quenching ◽  
Emission Quantum Yield

Remote sensitization in hybrid organic–inorganic Eu3+-doped layered silica nanoarchitectures allows for unusually high emission quantum yield through efficient energy transfer and the removal of ultra-fast quenching effects of inner-shell emitters.

scholarly journals High Emission Quantum Yield Tb3+ -Activated Organic-Inorganic Hybrids for UV-Down-Shifting Green Light-Emitting Diodes

2020 ◽  
Vol 2020 (18) ◽  
pp. 1736-1742
Author(s):  
Sandra F. H. Correia ◽  
Ricardo L. Fernandes ◽  
Lianshe Fu ◽  
Mariela M. Nolasco ◽  
Luís D. Carlos ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Light Emitting Diodes ◽  
Green Light ◽  
Light Emitting ◽  
High Emission ◽  
Emission Quantum Yield

scholarly journals Highly sensitive and precise optical temperature sensors based on new luminescent Tb3+/Eu3+ tetrakis complexes with imidazolic counterions

2020 ◽  
Vol 1 (6) ◽  
pp. 1988-1995
Author(s):  
Lucca B. Guimarães ◽  
Alexandre M. P. Botas ◽  
Maria C. F. C. Felinto ◽  
Rute A. S. Ferreira ◽  
Luis D. Carlos ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Low Temperature ◽  
Temperature Sensors ◽  
Highly Sensitive ◽  
High Emission ◽  
Yield Values ◽  
Emission Quantum Yield

Precise optical temperature sensors based on luminescent Tb3+:Eu3+ tetrakis complexes with imidazolic counterions with high emission quantum yield values and low temperature uncertainty.

Circularly polarized luminescence from chiral Eu(III) Complex with high emission quantum yield

2009 ◽  
Vol 488 (2) ◽  
pp. 599-602 ◽  
Author(s):  
Takashi Harada ◽  
Yasuchika Hasegawa ◽  
Yoko Nakano ◽  
Michiya Fujiki ◽  
Masanobu Naito ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Circularly Polarized ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence ◽  
High Emission ◽  
Emission Quantum Yield

Inorganic Solids of CdSe Nanocrystals Exhibiting High Emission Quantum Yield

2012 ◽  
Vol 22 (17) ◽  
pp. 3714-3722 ◽  
Author(s):  
Elena Khon ◽  
Scott Lambright ◽  
Dmitry Khon ◽  
Bryan Smith ◽  
Timothy O'Connor ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Cdse Nanocrystals ◽  
Inorganic Solids ◽  
High Emission ◽  
Emission Quantum Yield

Low threshold photonic crystal lasing from a dye with high emission quantum yield and weak self-quenching

2013 ◽  
Vol 1 (38) ◽  
pp. 6157 ◽  
Author(s):  
Jiao Feng ◽  
Sha Bian ◽  
Yue Long ◽  
Hao Yuan ◽  
Qing Liao ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Quantum Yield ◽  
High Emission ◽  
Low Threshold ◽  
Emission Quantum Yield

scholarly journals N-heterocyclic carbene-stabilized Au13 superatom clusters

2018 ◽  
Author(s):  
Mina R. Narouz ◽  
Shinjiro Takano ◽  
Paul A. Lummis ◽  
Tetyana I. Levchenko ◽  
Ali nazemi ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Electronic Structure ◽  
Quantum Yield ◽  
Magic Number ◽  
Heterocyclic Carbenes ◽  
High Yield ◽  
Background Color ◽  
Stable Clusters ◽  
High Emission ◽  
Emission Quantum Yield

p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; line-height: 20.0px; font: 17.4px Helvetica; color: #000000; -webkit-text-stroke: #000000; background-color: #ffffff} span.s1 {font-kerning: none} span.s2 {font: 11.2px Helvetica; font-kerning: none} span.s3 {font-kerning: none; color: #000000} <p>Magic number Au13 nanoclusters stabilized entirely by N-heterocyclic carbenes (NHCs) have been prepared by the bottom-up reduction of well-defined molecular NHC–Au–Cl complexes with sodium borohydride. The nature of the wingtip groups was shown to be critical in the preparation of stable clusters. The all NHC-clusters are prepared in high yield by this straight-forward method, display higher stability than related all phosphine clusters, and possess extremely high emission quantum yield. DFT analysis of these clusters based on the resolved crystal structure reveals their electronic structure as 8-electron superatoms.</p>

scholarly journals N-heterocyclic carbene-stabilized Au13 superatom clusters

2018 ◽  
Author(s):  
Mina R. Narouz ◽  
Shinjiro Takano ◽  
Paul A. Lummis ◽  
Tetyana I. Levchenko ◽  
Ali nazemi ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Electronic Structure ◽  
Quantum Yield ◽  
Magic Number ◽  
Heterocyclic Carbenes ◽  
High Yield ◽  
Background Color ◽  
Stable Clusters ◽  
High Emission ◽  
Emission Quantum Yield

p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; line-height: 20.0px; font: 17.4px Helvetica; color: #000000; -webkit-text-stroke: #000000; background-color: #ffffff} span.s1 {font-kerning: none} span.s2 {font: 11.2px Helvetica; font-kerning: none} span.s3 {font-kerning: none; color: #000000} <p>Magic number Au13 nanoclusters stabilized entirely by N-heterocyclic carbenes (NHCs) have been prepared by the bottom-up reduction of well-defined molecular NHC–Au–Cl complexes with sodium borohydride. The nature of the wingtip groups was shown to be critical in the preparation of stable clusters. The all NHC-clusters are prepared in high yield by this straight-forward method, display higher stability than related all phosphine clusters, and possess extremely high emission quantum yield. DFT analysis of these clusters based on the resolved crystal structure reveals their electronic structure as 8-electron superatoms.</p>

Optical emission characteristics of (Cu, Ag)In(Se, Te)2 pentenary alloys

1985 ◽  
Vol 63 (6) ◽  
pp. 781-785 ◽  
Author(s):  
T. M. Vanderwel ◽  
L. P. McNeil ◽  
P. E. Jessop ◽  
B. K. Garside
Keyword(s):  
Band Structure ◽  
Electronic Band Structure ◽  
Optical Emission ◽  
Face Centered Cubic ◽  
Group Vi ◽  
Electronic Band ◽  
Phase Transition Temperatures ◽  
High Emission ◽  
Thermal Analyser ◽  
Face Centered

Chalcopyrite alloys with the composition (Cu(1−x)Agx)In(Se(1−z)Tez)2 have been synthesized and characterized. X-ray powder-diffraction measurements show well-defined single-phase material at each composition, verifying complete miscibility. Lattice parameters and differential-thermal-analyser-determined phase-transition temperatures vary smoothly throughout the composition range. Luminescence measurements have been obtained for a large range of excess carrier levels, and characteristics of the electronic band structure have been inferred by comparison of the observed spectra with spectra calculated using a recently developed model.At all compositions, the short, interband, luminescence decay time and the relatively high emission intensity identify the bandgap as direct. The results of the luminescence analysis also indicate that the band structure is dominated by a shallow acceptor ((Ea–Ev) = 10 to 40 meV), except in the AgInSe2 corner where the acceptor concentration drops low enough to allow a donor at (Ec–Ed) = 55 meV to take precedence. Alloying of the group VI anion causes a significant decrease in the bandgap, which drops to almost 100 meV below the minimum monochalcogen value. There is also a large increase in the concentration of the acceptor, which indicates that this acceptor is due to imperfections in the anion face-centered cubic (fcc) sublattice.

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