- BENZIMIDAZOLE DERIVATIVE AND ORGANIC LIGHT EMITTING DEVICE COMPRISING SAME
-
The present invention relates to a benzimidazole derivative and an organic electroluminescent device comprising the same, wherein a novel benzimidazole derivative of the present invention having the structure of chemical formula 1, has excellent luminous efficiency. Therefore, the organic electroluminescent device comprising the same has excellent brightness, color purity, and luminous efficiency, and also enables low voltage driving.
- -
-
Paragraph 0057-0058; 0061-0062
(2020/08/01)
-
- Organic compound comprising boron and organic electroluminescent device comprising the same
-
The present invention relates to an organic material comprising a boron atom and an organic electroluminescent device using the same. The organic electroluminescent device of the present invention can obtain light of short wavelengths with high efficiency and can lower the driving voltage.COPYRIGHT KIPO 2020
- -
-
Paragraph 0204; 0205
(2019/12/03)
-
- Novel pyridinyl triazolopyridine derivatives and use thereof
-
The present invention relates to novel pyridinyl-triazolopyridine derivatives and uses thereof, and more specifically, to an aromatic organic material including pyrimidine and an organic electroluminescent device using the same. According to an embodiment of the present invention, the organic electroluminescent device using the aromatic organic material including the pyrimidine can obtain light at a short wavelength in a highly efficient manner while lowering the driving voltage.COPYRIGHT KIPO 2019
- -
-
Paragraph 0134-0136; 0139-0140
(2019/01/30)
-
- Organic compound comprising pyrimidine and organic electroluminescent device comprising the same
-
The present invention relates to an organic aromatic organic compound containing pyridine, and an organic electroluminescent device using the same, wherein the compound may be used as thermally activated delayed fluorescent (TADF) material due to having little energy difference between an excited singlet state and an excited triplet state. Further, the compound of the present invention may be used in an organic light-emitting diode to improve efficiency of the organic light-emitting diode and lower driving voltage thereof.COPYRIGHT KIPO 2017
- -
-
Paragraph 0104; 0105; 0109; 0110
(2018/02/10)
-
- NITRILE SUBSTITUTED DIBENZOFURANS
-
The present invention relates to compounds of formula a process for their production and their use in electronic devices, especially electroluminescent devices. When used as electron transport material, hole blocking material and/or host material for phosphorescent emitters in electroluminescent devices, the compounds of formula I may provide improved efficiency, stability, manufacturability, or spectral characteristics of electroluminescent devices.
- -
-
Page/Page column 65
(2016/09/26)
-
- EMISSIVE MATERIAL FOR ORGANIC EMITTING DIODES
-
Compounds represented by Formula 1 are described herein. Organic light-emitting elements and an organic light-emitting diode devices including these compounds, as well as methods related to preparing these compounds and devices, are also included in this disclosure.
- -
-
Paragraph 0061; 0063
(2016/06/01)
-
- High-efficiency blue phosphorescent organic light-emitting diodes using a carbazole and carboline-based host material
-
A novel bipolar host 9-(4-(9H-pyrido[2,3-b]indol-9-yl)phenyl)-9H-3, 9′-bicarbazole (pBCb2Cz) was prepared for high efficiency blue phosphorescent organic light-emitting diodes (PhOLEDs), a high triplet energy (ET) material, employing electron-deficient α-carboline. pBCb2Cz (ET = 2.93 eV) was effective as a host material for FIrpic- and FCNIrpic-based blue PhOLEDs, and highest quantum efficiencies of 23.0 and 16.2%, respectively, were achieved.
- Kim, Sun Jae,Kim, Young Jae,Son, Young Hoon,Hur, Jung A.,Um, Hyun Ah,Shin, Jicheol,Lee, Tae Wan,Cho, Min Ju,Kim, Jung Keun,Joo, Sunghoon,Yang, Joong Hwan,Chae, Gee Sung,Choi, Kihang,Hyuk Kwon, Jang,Hoon Choi, Dong
-
supporting information
p. 6788 - 6790
(2013/07/26)
-
- CARBAZOLE-CONTAINING MATERIALS IN PHOSPHORESCENT LIGHT EMITTING DIODES
-
Carbazole-containing compounds are provided. In particular, the compounds are oligocarbazole-containing compounds having an unsymmetrical structure. The compounds may be useful in organic light emitting devices, in particular as hosts in the emissive layer of such devices.
- -
-
-
- Porphyrins with four monodisperse oligocarbazole arms: Facile synthesis and photophysical properties
-
(Chemical Equation Presented) A series of novel monodisperse, well-defined, star-shaped molecules T(OCAn)Ps (n = 2-6) with a central porphyrin core and four oligocarbazole arms are synthesized from the corresponding formyl-substituted oligocarbazoles via Adler reaction. The obtained star-shaped porphyrins are intrinsically two-dimensional nanosized molecules, and the diameter of compound T(OCA6)P is 7.4 nm, representing one of the largest known star-shaped conjugated systems. Their photophysical properties have been investigated by absorption and steady-state fluorescence spectroscopy, together with the corresponding monodisperse oligocarbazole aldehyde precursors. It is found that the light-harvesting capability of T(OCAn)Ps increases with the increasing length of the arms and reaches the maximum when n = 6. A selective excitation of the oligocarbazole arms leads to the typical emission from the porphyrin cores, indicating occurrence of photoinduced intramolecular energy transfer, and the energy transfer efficiency decreases from T(OCA2)P to T(OCA6)P owing to the Foerster energy-transfer process. Accordingly, the longest effective distance for Foerster energy transfer is estimated to be ca. 3 nm in our system. Such star-shaped porphyrins may find applications in photonic devices, with respect to their intense emission of red light. Notably, the monodisperse oligocarbazole aldehyde precursors give twisted intramolecular charge-transfer (TICT) excited states and luminescence in polar solvents with large Stokes shifts.
- Xu, Tinghua,Lu, Ran,Liu, Xingliang,Chen, Peng,Qiu, Xianping,Zhao, Yingying
-
p. 1809 - 1817
(2008/09/18)
-
- Facile synthesis of novel monodisperse linear 3,9-linked oligocarbazoles
-
Novel monodisperse linear 3,9-linked oligocarbazoles (OCAs) were prepared stepwise using Ullmann coupling reaction in seal-tubes. The resulting OCAs were soluble in common organic solvents. The UV-vis spectra of OCAs exhibited small red shift and their intensities increased linearly with the increase of the carbazole moieties, suggesting that no intramolecular π-interactions appeared at ≤8-mer. All the OCAs gave strong fluorescence and it was found that the conjugated degree of linear OCAs would be saturated when the number of carbazole units reaches four.
- Xu, Tinghua,Lu, Ran,Jin, Ming,Qiu, Xianping,Xue, Pengchong,Bao, Chunyan,Zhao, Yingying
-
p. 6883 - 6886
(2007/10/03)
-