Luminescent Thin Films Composed of Nanosized Europium Coordination Polymers on Glass Electrodes

Hasegawa, Yasuchika; Sugawara, Takeshi; Nakanishi, Takayuki; Kitagawa, Yuichi; Takada, Makoto; Niwa, Akitsugu; Naito, Hiroyoshi; Fushimi, Koji

doi:10.1002/cplu.201500382

Cited by 16 publications

(5 citation statements)

References 30 publications

(43 reference statements)

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“…The glass transition temperature and EL luminance were estimated to be 220°C and 149 cd m −2 , respectively. We also reported Eu(III) coordination nanoparticles on glass electrodes for EL devices 137 . The thermostability of a luminescent lanthanide complex is one of important factors for the fabrication of EL devices.…”

Section: Electrosensitized Luminescencementioning

confidence: 77%

Effective photosensitized, electrosensitized, and mechanosensitized luminescence of lanthanide complexes

2018

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The 4f-4f emission of Tb(III), Eu(III), and Sm(III) complexes plays an important role in the design of monochromatic green, red, and deep-red luminescent materials for displays, lighting, and sensing devices. The 4f-4f emission of Yb(III), Nd(III), and Er(III) complexes is observed in the near-infrared (IR) region for bioimaging and security applications. However, their absorption coefficients are extremely small (ε < 10 L mol −1 cm −1 ). In this review, photosensitized luminescent lanthanide(III) complexes containing organic chromophores (ligands) with large absorption coefficients (ε > 10,000 L mol −1 cm −1 ) are introduced. Organic molecular design elements, including (1) the control of the excited triplet (T 1 ) state, (2) the effects on the charge-transfer (CT) band, and (3) the energy transfer from metal ions for effective photosensitized luminescence, are explained. The characteristic electrosensitized luminescence (electroluminescence) and mechanoluminescence (triboluminescence) of lanthanide(III) complexes are also explained. Lanthanide(III) complexes with well-designed organic molecules are expected to open avenues of research among the fields of chemistry, physics, electronics, and material science.

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Section: Electrosensitized Luminescencementioning

confidence: 77%

Effective photosensitized, electrosensitized, and mechanosensitized luminescence of lanthanide complexes

2018

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“…[17] ), and In order to measure EL spectra, incorporation of hole/electron transport units and adjustment of HOMO-LUMO energy level of the ligands in Ln III coordination polymers are required. [18] Introduction of substituents for EL devices also drastically affects on TL activity due to the 7 structural modification. For these reasons, EL spectra of [Ln(hfa) 3 (dpf)] n are not available in this study.…”

Section: Preparation Of 25-bis(diphenylphosphoryl)furan (Dpf)mentioning

confidence: 99%

Triboluminescence of Lanthanide Coordination Polymers with Face‐to‐Face Arranged Substituents

et al. 2017

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GeneralEuropium acetate n-hydrate (99.9%), terbium acetate tetrahydrate (99.9%), gadolinium acetate tetrahydrate (99.9%), 1.55 M n-butyllithium (n-BuLi) in n-hexane, and hydrogen peroxide were purchased from Kanto Chemical Co., Inc. 2,5-Dibromofuran, 3,4-ethylenedioxythiophene, 2,5-dibromothiophene, and chlorodiphenylphosphine (PPh 2 Cl) were obtained from Tokyo Chemical Industry Co., Ltd. All other chemicals and solvents were reagent grade and were used without further purification.

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“…The carbazole unit in the joint linker ligand plays an important role of hole transfer in an emitting layer . Luminescent Eu(ntfa) 3 parts (ntfa = 3-(2-naphthoyl)-1,1,1-trifluoroacetonate) were also selected for smooth formation of the excited state on the antenna ligands under electron and hole transfers from each transport material in EL devices . Based on their elemental analyses, the ratio of Eu(III) complexes and bidentate-dppcz was found to be 1:1 (one-dimensional structure).…”

Section: Introductionmentioning

confidence: 99%

“…11 Luminescent Eu(ntfa) 3 parts (ntfa = 3-(2-naphthoyl)-1,1,1trifluoroacetonate) were also selected for smooth formation of the excited state on the antenna ligands under electron and hole transfers from each transport material in EL devices. 20 Based on their elemental analyses, the ratio of Eu(III) complexes and bidentate-dppcz was found to be 1:1 (onedimensional structure). The ratio to Eu(ntfa) 3 and tridentatetpcz was estimated to be 1.5 (two-dimensional structure).…”

Section: ■ Introductionmentioning

confidence: 99%

Effective Europium Coordination Luminophores Linked with Bi- and Tridentate Carbazole Phosphine Oxides for Organic Electroluminescent Devices

et al. 2018

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Lanthanide coordination polymers with charge combination parts, hole and electron transport units, [Eu-(ntfa) , are reported as an emitting material for organic electroluminescent (EL) devices. The intrinsic emission quantum yields Φ 4f−4f of [Eu(ntfa) 3 (dppcz)] n and [Eu 3 (ntfa) 9 (tpcz) 2 ] n in the solid state were calculated to be 32% and 45%, respectively. The photosensitized energy-transfer efficiencies η sens from organic ntfa ligands to luminescent Eu(III) ions in [Eu(ntfa) 3 (dppcz)] n and [Eu 3 (ntfa) 9 (tpcz) 2 ] n were found to be 84% and 39%, respectively. The energy-transfer efficiency η sens from ntfa to Eu(III) ion is dependent on the network structure in Eu(III) coordination polymers in the solid state. The η sens values and characteristic structures of Eu(III) coordination polymers are directly linked to maximum luminances and current efficiencies in solid EL devices, respectively. The luminance of an EL device containing [Eu(ntfa) 3 (dppcz)] n was estimated to be 188 cd/m 2 at 15 V, which is greater than that of previously reported EL devices with Eu(III) complexes.

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Luminescent Thin Films Composed of Nanosized Europium Coordination Polymers on Glass Electrodes

Cited by 16 publications

References 30 publications

Effective photosensitized, electrosensitized, and mechanosensitized luminescence of lanthanide complexes

Effective photosensitized, electrosensitized, and mechanosensitized luminescence of lanthanide complexes

Triboluminescence of Lanthanide Coordination Polymers with Face‐to‐Face Arranged Substituents

Effective Europium Coordination Luminophores Linked with Bi- and Tridentate Carbazole Phosphine Oxides for Organic Electroluminescent Devices

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