- Remarkable luminescence properties of lanthanide complexes with asymmetric dodecahedron structures
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The distorted coordination structures and luminescence properties of novel lanthanide complexes with oxo-linked bidentate phosphane oxide ligands-4,5-bis(diphenylphosphoryl)-9,9-dimethylxanthene (xantpo), 4,5-bis(di-tert-butylphosphoryl)-9,9-dimethylxanth
- Miyata, Kohei,Nakagawa, Tetsuya,Kawakami, Ryuhei,Kita, Yuki,Sugimoto, Katsufumi,Nakashima, Takuya,Harada, Takashi,Kawai, Tsuyoshi,Hasegawa, Yasuchika
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Read Online
- Eu COMPLEX AND ORGANIC EL ELEMENT
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PROBLEM TO BE SOLVED: To provide a particulate rare earth complex composition that enables thin film deposition in a solution process, and also enables light emission even when used as a light emitting layer of an organic EL device, and an organic EL devi
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Paragraph 0086; 0087
(2018/04/20)
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- Photoluminescent tetrazolate-based Eu(III) complexes: An outstanding impact of aromatic phosphine oxide co-ligands on the photoluminescence quantum yields
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New ternary Eu(III) 5-(2-pyridyl-1-oxide)tetrazolate complexes with phosphine oxide co-ligands have been synthesized and characterized by elemental analysis, and IR and 1H NMR spectroscopic techniques. The analytical data revealed that these complexes are
- Pietraszkiewicz, Marek,Mal, Suraj,Pietraszkiewicz, Oksana,Gorski, Krzysztof,Chelwani, Nitin
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p. 239 - 247
(2014/06/23)
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- Convergent modulation of singlet and triplet excited states of phosphine-oxide hosts through the management of molecular structure and functional-group linkages for low-voltage-driven electrophosphorescence
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The controllable tuning of the excited states in a series of phosphine-oxide hosts (DPExPOCzn) was realized through introducing carbazolyl and diphenylphosphine-oxide (DPPO) moieties to adjust the frontier molecular orbitals, molecular rigidity, and the location of the triplet excited states by suppressing the intramolecular interplay of the combined multi-insulating and meso linkage. On increasing the number of substituents, simultaneous lowering of the first singlet energy levels (S1) and raising of the first triplet energy levels (T1, about 3.0 eV) were achieved. The former change was mainly due to the contribution of the carbazolyl group to the HOMOs and the extended conjugation. The latter change was due to an enhanced molecular rigidity and the shift of the T1 states from the diphenylether group to the carbazolyl moieties. This kind of convergent modulation of excited states not only facilitates the exothermic energy transfer to the dopants in phosphorescent organic light-emitting diodes (PHOLEDs), but also realizes the fine-tuning of electrical properties to achieve the balanced carrier injection and transportation in the emitting layers. As the result, the favorable performance of blue-light-emitting PHOLEDs was demonstrated, including much-lower driving voltages of 2.6 V for onset and 3.0 V at 100 cd m -2, as well as a remarkably improved E.Q.E. of 12.6 %.
- Han, Chunmiao,Zhang, Zhensong,Xu, Hui,Xie, Guohua,Li, Jing,Zhao, Yi,Deng, Zhaopeng,Liu, Shiyong,Yan, Pengfei
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p. 141 - 154
(2013/03/13)
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- RARE-EARTH COMPLEX AND USES THEREOF
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The rare-earth complex of the present invention has high luminous efficiency, since it has a structure represented by the following general formula (I):
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Page/Page column 16
(2012/07/14)
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