Influences of compositions and ligands on photoluminescent properties of Eu(III) ions in composite europium complex/PMMA systems

Liu, Hong-Guo; Feng, Xi; Jang, Kiwan; Kim, Sangsu; Won, Tae‐Jin; Sheng-yun, Cui; Lee, Yong‐Ill

doi:10.1016/j.jlumin.2007.01.001

Cited by 19 publications

(4 citation statements)

References 73 publications

(87 reference statements)

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“…In the blended thin film of Alq 3 :PMMA with different concentration ratios, neither annealing nor sublimation at high temperature was carried out, hence the structure of the Alq3 molecule remains the same in the blended thin film as it was in Alq 3 powder, and still we observed a slight blue shift of 4 nm in a blended thin film of 1 wt% concentration and a red shift of 12 nm in a blended thin film of 10 wt% concentration. The observed blue shift of emission may be attributed to cross‐relaxation , whereas the red shift of emission may be attributed to the change from a two‐dimensional (2D) excitation state (surface component) to a three‐dimensional (3D) excitation state (bulk component) .…”

Section: Resultsmentioning

confidence: 98%

Photoluminescence of Alq₃‐ and Tb‐activated aluminium–tris(8‐hydroxyquinoline) complex for blue chip‐excited OLEDs

Yawalkar¹,

Dhoble

Kalyani³

et al. 2012

Luminescence

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The tris(8-hydroxyquinoline)-aluminium complex is the most important and widely studied as electron transporting and green light emitting material. Alq(3) and Tb(x) Al((1-x)) q(3) have been synthesized (where x = 0.1, 0.3, 0.5, 0.7 and 0.9) and blended films of Alq(3) and Tb(x) Al((1-x)) q(3) with PMMA and PS at different percentage weight (wt%) concentrations (e.g., 0.1, 1, 5, 10, 25 and 50 wt%) have been prepared. The synthesized materials and their blended thin films have been characterized by a photoluminescence (PL) technique; the synthesis and PL characterization are reported in this paper. The synthesized metal complex shows bright emission of green light with blue light excitation (440 nm) and the prepared Tb(x) Al((1-x)) q(3) phosphor may be applicable in blue chip-excited OLEDs for the newly developed wallpaper lighting technology.

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Section: Resultsmentioning

confidence: 98%

Photoluminescence of Alq₃‐ and Tb‐activated aluminium–tris(8‐hydroxyquinoline) complex for blue chip‐excited OLEDs

Yawalkar¹,

Dhoble

Kalyani³

et al. 2012

Luminescence

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“…The positive P value in Table 3 demonstrates that the fluorescence emission of europium ions was greatly sensitized by terbium ions. PMMA, as a matrix to the luminescence complexes, had great effects on the PL properties of Eu 3+ because of the strong coordination interaction between Eu 3+ and C=O group [11] . The interaction between the ligands and PMMA resulted in the formation of different microenvironments around Eu 3+ , which changes with the composition of the composite, as can be seen in Fig.3.…”

Section: Sensitization Effect and Photoluminescence Propertiesmentioning

confidence: 99%

Sensitization and intra-molecular energy transfer of Eu3+ by Tb3+ in Eu-Tb binuclear complexes/PMMA

Han

2011

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

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A series of Eu 0.5 Tb 0.5 (TTA) 3 Phen/PMMA (TTA=thenoyltrifl uoroacetone, Phen=phenanthroline) and Eu 0.5 Tb 0.5 (TTA) 3 Dipy/PMMA (Dipy=2,2'-dipyridyl) were prepared by in-situ polymerization. The structures of the composites were characterized by IR spectra and electron spectrum. Photoluminescence properties were investigated by UV-Vis spectra and fl uorescence spectra. Meanwhile, the energy transfer models were set up. The results indicated that polymer parts were attached with the rare-earth molecular parts in the composite luminescent materials. Eu 0.5 Tb 0.5 (TTA) 3 Phen/PMMA and Eu 0.5 Tb 0.5 (TTA) 3 Dipy/PMMA emitted mostly characteristic fl uorescence of europium ion and intense red fl uorescence with peak wavelength at 611.8 nm and bandwidth of 10.4 nm under UV excitation at 365 nm. Fluorescence intensity of Eu 0.5 Tb 0.5 (TTA) 3 Phen/PMMA was found to be infl uenced with the content of MMA. The fl uorescence emission of europium ions was greatly sensitized by terbium ions and the enhancement of red emission was most likely due to the energy transfer enhancement from Tb 3+ to Eu 3+ .

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“…Poly methyl methacrylate (PMMA) exhibits high transparency in the visible spectral region, excellent weather resistance, and high mechanical strength. Moreover, PMMA contains carbonyl groups along with its carbon chain that can be interacted with Ln complexes [44][45][46][47][48][49][50]. These characteristics make it suitable as a host material for lanthanide complex doping.…”

Section: Introductionmentioning

confidence: 99%

Photon Conversion and Radiation Synergism in Eu/Tb Complexes Incorporated Poly Methyl Methacrylate

Xiao

Zhang

Wang

et al. 2016

Advances in Materials Science and Engineering

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Green and red emissions in terbium and europium benzoic acids (TBA and EBA) incorporated poly methyl methacrylates (PMMA) are exhibited. Larger intensity parametersΩ2(11.13×10-20 cm2) andΩ4(13.15×10-20 cm2) ofEu3+indicate a high inversion asymmetrical and strong covalent environment around lanthanide (Ln) ions and maximum emission cross sectionσem-max(2.45×10-21 cm2) for the dominant transitionD50→F27ofEu3+reveals the effective photon conversion capacity in EBA incorporated PMMA. Color variation and fluorescence enhancement are validated to be originated from energy transfer and synergistic effect in TBA/EBA coincorporated PMMA system. The results indicate that Eu and Tb complexes incorporated PMMA with effective photon conversion hold great prospect in increment of lighting quality and enhancement of solar-cell efficiency employed in outer space.

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Influences of compositions and ligands on photoluminescent properties of Eu(III) ions in composite europium complex/PMMA systems

Cited by 19 publications

References 73 publications

Photoluminescence of Alq₃‐ and Tb‐activated aluminium–tris(8‐hydroxyquinoline) complex for blue chip‐excited OLEDs

Photoluminescence of Alq₃‐ and Tb‐activated aluminium–tris(8‐hydroxyquinoline) complex for blue chip‐excited OLEDs

Sensitization and intra-molecular energy transfer of Eu3+ by Tb3+ in Eu-Tb binuclear complexes/PMMA

Photon Conversion and Radiation Synergism in Eu/Tb Complexes Incorporated Poly Methyl Methacrylate

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Influences of compositions and ligands on photoluminescent properties of Eu(III) ions in composite europium complex/PMMA systems

Cited by 19 publications

References 73 publications

Photoluminescence of Alq3‐ and Tb‐activated aluminium–tris(8‐hydroxyquinoline) complex for blue chip‐excited OLEDs

Photoluminescence of Alq3‐ and Tb‐activated aluminium–tris(8‐hydroxyquinoline) complex for blue chip‐excited OLEDs

Sensitization and intra-molecular energy transfer of Eu3+ by Tb3+ in Eu-Tb binuclear complexes/PMMA

Photon Conversion and Radiation Synergism in Eu/Tb Complexes Incorporated Poly Methyl Methacrylate

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Photoluminescence of Alq₃‐ and Tb‐activated aluminium–tris(8‐hydroxyquinoline) complex for blue chip‐excited OLEDs

Photoluminescence of Alq₃‐ and Tb‐activated aluminium–tris(8‐hydroxyquinoline) complex for blue chip‐excited OLEDs