Near-infrared Electroluminescence from Ytterbium(III) Complex

Kawamura, Yuichiro; Wada, Yuji; Iwamuro, Mitsunori; Kitamura, Takayuki; Yanagida, Shozo

doi:10.1246/cl.2000.280

Cited by 42 publications

(35 citation statements)

References 10 publications

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“…[4,13,14] In addition to the work on devices processed using vapor deposition mentioned above, other groups have examined the EL properties of devices in which the active material consists of blends of conjugated polymers with lanthanide complexes. Examples in this area include red emission from blends of a blue-emitting, alkoxy nitrile-functionalized, polyphenylene host with several europium b-diketonate complexes [2] and near-IR emission from a lissamine complex of Nd 3+ in a blue-emitting polyfluorene-based copolymer host.…”

Section: +mentioning

confidence: 99%

Near‐Infrared Electroluminescence from Lanthanide Tetraphenylporphyrin:Polystyrene Blends

et al. 2003

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the effect of morphology on the transistor performance of Me 4 PENT is underway and will be reported in a future publication.In conclusion, a pentacene derivative, Me 4 PENT, has been successfully synthesized and single crystals of Me 4 PENT were obtained by gradient sublimation. Calculations show that Me 4 PENT has similar reorganization energy to that of pentacene. TFTs fabricated with Me 4 PENT showed a higher charge transport mobility with the bottom-contact mode device prepared with a deposition substrate temperature of 25 C and even higher charge transport mobility (0.31 cm 2 V ±1 s ±1 ) in devices prepared with a deposition substrate temperature of 85 C.Experimental 2,3,9,10-Tetramethyl-pentacene (Me 4 PENT): Into a round-bottomed flask, aluminum wire (2.5 g, 0.093 mol), mercuric chloride (0.05 g, 0.184 mmol), and dry cyclohexanol (100 mL), with one drop of carbon tetrachloride (0.2 mL) were added. The mixture was refluxed overnight under argon. Compound 4 (2,3,9,10-tetramethylpentacene-6,13-dione, supporting information on the synthesis of compound 4 is available from the authors upon request) (1.46 g, 0.004 mol) was then added in one portion and the mixture was refluxed for 3 days. After cooling to 60 C, the solvent was decanted and ethanol (60 mL) was added. The precipitate was separated by centrifugation, washed with hot acetic acid (2 50 mL), 25 % HCl (2 50 mL), hot water (2 50 mL), and ethanol again (2 50 mL). The dark blue compound was dried under vacuum at 60 C overnight to give a crude product (0.94 g, 70 %), which was further purified by gradient sublimation to yield dark blue crystals m.p. > 300 C (0.39 g, 42 %). MS (EI) m/z: 334 (M + , 100).

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Section: +mentioning

confidence: 99%

Near‐Infrared Electroluminescence from Lanthanide Tetraphenylporphyrin:Polystyrene Blends

et al. 2003

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“…Data 1994, 39, 670) using a modified Arrhenius expression. [14] Introducing a segmented, rather than a homogeneous flow, into the reactor can reduce the dispersion in the RTD. In such an approach, the flow is comprised of small, alternating segments of two different phases moving through the heated section.…”

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confidence: 99%

“…Molecular and polymeric organics are among the materials that, in principle, meet these criteria, but as yet they are not readily available with efficient tunable emission beyond the wavelength of k = 1 lm, even when inorganic complexes are used as the emitter in doped organic structures. [13,14] In this study we generate NIR electroluminescence (EL) using inorganic PbSe nanocrystals in solution processible organic structures. Although our reported efficiencies are low, the demonstrated QD-LEDs are controllably tuned across the NIR spectrum and have the potential to be further improved based on the high solution photoluminescence (PL) efficiencies of the starting materials and our previous studies [6,7] of efficient CdSe QD-LEDs.…”

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confidence: 99%

1.3 μm to 1.55 μm Tunable Electroluminescence from PbSe Quantum Dots Embedded within an Organic Device

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the precursors flowed into the heated section, where they quickly reacted to form NCs. The NC solution was then collected for absorption and photoluminescence measurements.Optical absorption spectra were acquired using a Hewlett-Packard 8453 diode array spectrometer. Photoluminescence spectra were acquired using a SPEX Fluorolog 1680 spectrometer, using right-angle collection. Samples were prepared by diluting the raw NC solutions in hexane. Quantum yields were determined by comparing the integrated emission of a given NC sample solution with that of an appropriate reference dye [18].

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“…They synthesized tris (8-hydroxyquinoline) series and observed luminescence and electroluminescence at 1.54 μm in organic device. Yanagita et al 33,34 synthesized lanthanide complex compounds with tris (dibenzoylmethanato) ligand and observed near infrared luminescence by making organic monomer luminescence device.…”

Section: Recent Progress In Luminescent Lanthanide Complexes7mentioning

confidence: 99%

Lanthanide-cored supramolecular systems with highly efficient light-harvesting dendritic arrays towards tomorrow’s information technology

et al. 2003

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We have developed novel lanthanide-cored supramolecular systems with highly efficient light-harvesting dendritic arrays for integrated planar waveguide-typed amplifiers. Er 3+ ions were encapsulated by the supramolecular ligands, such as porphyrins and macrobicyclics. The supramolecular ligands have been designed and synthesized to provide enough coordination sites for the formation of stable Er(III)-chelated complexes. For getting a higher optical amplification gain, also, the energy levels of the supramolecular ligands were tailored to maintain the effective energy transfer process from supramolecular ligands to erbium(III) ions. Furthermore, to maximize the light-harvesting effect, new aryl ether-functionalized dendrons as photon antennas have been incorporated into lanthanide-cored supramolecular systems. In this paper, molecular design, synthesis and luminescent properties of novel lanthanidecored integrated supramolecular systems with highly efficient light-harvesting dendritic arrays will be discussed.

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Near-infrared Electroluminescence from Ytterbium(III) Complex

Cited by 42 publications

References 10 publications

Near‐Infrared Electroluminescence from Lanthanide Tetraphenylporphyrin:Polystyrene Blends

Near‐Infrared Electroluminescence from Lanthanide Tetraphenylporphyrin:Polystyrene Blends

1.3 μm to 1.55 μm Tunable Electroluminescence from PbSe Quantum Dots Embedded within an Organic Device

Lanthanide-cored supramolecular systems with highly efficient light-harvesting dendritic arrays towards tomorrow’s information technology

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