Voltage color tunable OLED with (Sm,Eu)-β-diketonate complex blend

Reyes, Reynaldo; Cremona, M.; Teotonio, Ercules E.S.; Brito, Hermi F.; Malta, O.L.

doi:10.1016/j.cplett.2004.07.074

Cited by 73 publications

(50 citation statements)

References 17 publications

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“…These complexes can be embedded in the matrix [8,[15][16][17][18][19] by the use of ligands covalently grafted to the framework, [8,[20][21][22][23][24][25][26][27][28][29][30] or by anchoring the lan- New europium and gadolinium tris-b-diketonate complexes have been prepared and incorporated in sol-gel-derived organic-inorganic hybrids, named di-ureasils. The general formula [Ln(btfa) 3 -(4,4'-bpy)(EtOH)] (Ln = Eu, Gd; 4,4'-bpy = 4,4'-bipyridine; btfa = 4,4,4-trifluoro-1-phenyl-1,3-butanedione) for the complexes was confirmed by X-ray crystallography and elemental analysis. The ground-state geometry of the Eu 3 + complex was calculated from the Sparkle/AM1 model.…”

Section: Introductionmentioning

confidence: 91%

Spectroscopic Study of a UV‐Photostable Organic–Inorganic Hybrids Incorporating an Eu³⁺ β‐Diketonate Complex

Lima¹,

Ferreira²,

Freire³

et al. 2006

ChemPhysChem

130

111

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New europium and gadolinium tris-beta-diketonate complexes have been prepared and incorporated in sol-gel-derived organic-inorganic hybrids, named di-ureasils. The general formula [Ln(btfa)3(4,4'-bpy)(EtOH)] (Ln=Eu, Gd; 4,4'-bpy=4,4'-bipyridine; btfa=4,4,4-trifluoro-1-phenyl-1,3-butanedione) for the complexes was confirmed by X-ray crystallography and elemental analysis. The ground-state geometry of the Eu3+ complex was calculated from the Sparkle/AM1 model. The calculated quantum yield obtained from the Sparkle model and from the crystal structure (both 46%) are in satisfactory agreement with the experimental value (38+/-4%). In the isolated complex the most efficient luminescence channel is S0-->S1-->T-->(5D1, 5D0)-->7F0-6, where the exchange mechanism dominates in the energy-transfer channel T-->(5D1, 5D0). For the Eu3+-based di-ureasils a 50% quantum yield enhancement compared to the Eu3+ complex is observed, which suggests an effective hybrid host-metal ion interaction and an active energy-transfer channel between the hybrid host and the Eu3+ complex. The Eu3+-based di-ureasils are photostable under UVA (360 nm) excitation, whereas under UVB (320 nm) and UVC (290 nm) photodegradation occurs.

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Section: Introductionmentioning

confidence: 91%

Spectroscopic Study of a UV‐Photostable Organic–Inorganic Hybrids Incorporating an Eu³⁺ β‐Diketonate Complex

Lima¹,

Ferreira²,

Freire³

et al. 2006

ChemPhysChem

130

111

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“…[1][2][3][4][5][6][7] Processable lanthanide-based luminescent molecular materials can be obtained by doping the lanthanide(III) complex in a polymer matrix. 8,9 Typical applications of such polymer films are in organic light emitting diodes (OLEDs) [10][11][12][13][14] or in active optical polymer fibers for data transmission. [15][16][17] A popular polymer matrix for use as host for luminescent lanthanide complexes is poly-(methyl methacrylate) (PMMA), which is transparent at wavelengths longer than 250 nm.…”

Section: Introductionmentioning

confidence: 99%

Ionic liquid as plasticizer for europium(iii)-doped luminescent poly(methyl methacrylate) films

Lunstroot

Driesen

Nockemann

et al. 2010

Phys. Chem. Chem. Phys.

147

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Flexible luminescent polymer films were obtained by doping europium(III) complexes in blends of poly(methyl methacrylate) (PMMA) and the ionic liquid 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, [C 6 3 ], where nta is 2-naphthoyltrifluoroacetonate, tta is 2-thenoyltrifluoroacetonate, phen is 1,10-phenanthroline, dpa is 2,6-pyridinedicarboxylate (dipicolinate) and choline is the 2-hydroxyethyltrimethyl ammonium cation. Bright red photoluminescence was observed for all the films upon irradiation with ultraviolet radiation. The luminescent films have been investigated by high-resolution steady-state luminescence spectroscopy and by time-resolved measurements. The polymer films doped with b-diketonate complexes are characterized by a very intense 5 D 0 -7 F 2 transition (up to 15 times more intense than the 5 D 0 -7 F 1 ) transition, whereas a marked feature of the PMMA films doped with [choline] 3 [Eu(dpa) 3 ] is the long lifetime of the 5 D 0 excited state (1.8 ms).

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“…The lanthanides (Ln) have been widely used in variety of photonic applications, for example color TVs, light-emitting diodes (LEDs), solid-state lasers, scintillators, the color rendering of lightings, electric lamps, and optical fiber amplifiers [1][2][3][4]. However, lanthanide can hardly be & Firas J. Kadhim dr.firas1990@yahoo.com applied to organic material-based photonic components and devices because lanthanides are insoluble in organic materials [5].…”

Section: Introductionmentioning

confidence: 98%

Photoluminescence analysis for terbium β-diketonate complex-based silica xerogel matrices

Kadhim

Twej

Mahdi

et al. 2015

J Sol-Gel Sci Technol

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In this work, luminescent complex, terbium (III) bdiketonate (C 24 H 16 F 9 O 8 S 3 Tb), was prepared and incorporated into silica matrix by ordinary sol-gel method. The starting precursor which provide silica matrices was tetraethyl orthosilicate (SiOC 2 H 5 ) 4 . The experimental conditions have been adopted, so that the sample formation via sol-gel route was started at neutral pH, whereas the final pH value was normalized to three before reaching gel point. The spectroscopic analysis of terbium b-diketonate complexes-based xerogel matrices as a function of Tb ?3 concentrations has been realized using UVvisible absorption, (FTIR) spectroscopy and luminescence measurement. The luminescence behavior of Tb 3? ions can be improved in such matrices. The complex can be incorporated into the silica matrix at the same time as the hydrolysis and condensation reaction of the silanes start. The green emission of Tb 3? ions at 544 nm was clearly observed and indicates the good stability of Tb complex in silica sol-gel matrices. Graphical AbstractKeywords Sol-gel Á Silica matrix Á Terbium b-diketonate complex Á Luminescence

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Voltage color tunable OLED with (Sm,Eu)-β-diketonate complex blend

Cited by 73 publications

References 17 publications

Spectroscopic Study of a UV‐Photostable Organic–Inorganic Hybrids Incorporating an Eu³⁺ β‐Diketonate Complex

Spectroscopic Study of a UV‐Photostable Organic–Inorganic Hybrids Incorporating an Eu³⁺ β‐Diketonate Complex

Ionic liquid as plasticizer for europium(iii)-doped luminescent poly(methyl methacrylate) films

Photoluminescence analysis for terbium β-diketonate complex-based silica xerogel matrices

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Voltage color tunable OLED with (Sm,Eu)-β-diketonate complex blend

Cited by 73 publications

References 17 publications

Spectroscopic Study of a UV‐Photostable Organic–Inorganic Hybrids Incorporating an Eu3+ β‐Diketonate Complex

Spectroscopic Study of a UV‐Photostable Organic–Inorganic Hybrids Incorporating an Eu3+ β‐Diketonate Complex

Ionic liquid as plasticizer for europium(iii)-doped luminescent poly(methyl methacrylate) films

Photoluminescence analysis for terbium β-diketonate complex-based silica xerogel matrices

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Spectroscopic Study of a UV‐Photostable Organic–Inorganic Hybrids Incorporating an Eu³⁺ β‐Diketonate Complex

Spectroscopic Study of a UV‐Photostable Organic–Inorganic Hybrids Incorporating an Eu³⁺ β‐Diketonate Complex