- An electroluminescent compound and an electroluminescent device comprising the same
-
The present invention relates to an organic light-emitting compound represented by [Chemical formula 1]. An organic electroluminescent device comprising the organic light-emitting compound in the present invention has excellent power efficiency, light-emitting efficiency, and long life cycle because the present invention can be operated by a lower driving-voltage in comparison with a device comprising conventional phosphorescent host materials. [Chemical formula 1].
- -
-
Paragraph 0380; 0385-0388; 0694; 0711-0714
(2020/09/26)
-
- Aromatic compound and organoelectro luminescent device comprising the compound
-
The present invention relates to an aromatic compound denoted by chemical formula 1, and an organic electroluminescent device comprising the compound. The organic electroluminescent device comprising the aromatic compound by the present invention has low driving voltage, and excellent lifetime properties and luminance efficiency.
- -
-
Paragraph 0368; 0374-0378; 0791; 0804-0809
(2020/12/08)
-
- An electroluminescen compound and an electroluminescent device comprising the same
-
The present invention relates to an organic light-emitting compound represented by chemical formula 1. An organic electroluminescent device comprising the organic light-emitting compound in the present invention has excellent power efficiency, light-emitting efficiency, and long life cycle because the present invention can be operated by a lower driving-voltage in comparison with a device comprising conventional phosphorescent host materials.
- -
-
Paragraph 0376-0380; 0634; 0639-0642
(2021/02/02)
-
- An organoelectro luminescent compounds and organoelectro luminescent device using the same
-
The present invention relates to an organic light emitting compound represented by Formula I or Formula III, and an organic electroluminescent device including the same. The organic light-emitting compound according to the present invention has excellent brightness and luminous efficiency, and can be driven at a low voltage and has improved power efficiency. A compound of the formula I: No.No. STRIII No.No. wherein X represents a hydrogen atom or a methyl group. (by machine translation)
- -
-
Paragraph 0331; 0336-0339; 0455; 0460-0462
(2020/11/03)
-
- An organoelectro luminescent compounds and organoelectro luminescent device using the same
-
The present invention relates to an organic light emitting compound represented by chemical formula I to III, and to an organic electroluminescent device including the same. According to the present invention, the organic electroluminescent device including the organic light emitting compound uses low driving voltages and has excellent efficiency of light emission.
- -
-
Paragraph 0256; 0269-0272; 0452; 0457-0460
(2021/01/06)
-
- Asymmetrically difunctionalized dibenzo[b,d]furan-based hole blocking materials for high-performance blue phosphorescent organic light-emitting diodes
-
Many researchers have reported dibenzo[b,d]furan segment as a building block of organic light-emitting diode (OLED) materials because it has high thermal stability and triplet energy. However, most of the research has focused on symmetrically substituting the same functional groups at 2-position due to easy functionalization or substituting the same functional groups at different positions of dibenzo[b,d]furan. Herein, we design and synthesize three new hole blocking materials based on asymmetrically difunctionalized dibenzo[b,d]furan, diphenyl (2-(pyridin-3-yl)dibenzo[b,d]furan-6-yl)phosphine oxide (DBFPO-Py), diphenyl(2-(pyrimidin-5-yl)dibenzo[b,d]furan-6-yl)phosphine oxide (DBFPO-Pyr), and diphenyl(2-(4-(triphenylsilyl)phenyl)dibenzo[b,d]furan-6-yl)phosphine oxide (DBFPO-Si) for high-performance phosphorescent OLEDs. Phosphine oxide, tetraphenylsilane, pyridine, and pyrimidine segments are successfully introduced into the asymmetric position of a dibenzo[b,d]furan. It is found that DBFPO-Py, DBFPO-Pyr, and DBFPO-Si possess high thermal stability; high triplet energies of 2.96, 2.98, and 2.80 eV; and deep highest occupied molecular orbital (HOMO) energy levels of ?7.13, ?7.23 and ?7.07 eV; respectively. Blue phosphorescent OLEDs with DBFPO-Py, DBFPO-Pyr, and DBFPO-Si show low turn-on voltages, high current and power efficiencies, and superior external quantum efficiencies. Blue phosphorescent OLEDs with DBFPO-Py and DBFPO-Pyr showed improved performance in terms of current and power efficiencies, etc, compared with the device with 1,3-bis(3,5-dipyrid-3-yl-phenyl)benzene (BmPyPB), which is commonly used as a hole blocking layer. More importantly, the blue phosphorescent OLEDs with DBFPO-Pyr showed the best performance with maximum external quantum efficiency of 23.6%, current efficiency of 29.8 cd A?1, power efficiency of 26.0 lm W?1, and low efficiency roll-off of 6.38%. Novel hole blocking materials based on asymmetrically difunctionalized dibenzo[b,d]furan are expected to make a significant contribution to the development of blue phosphorescent OLEDs.
- Chung, Won Jae,Hong, Soojin,Jang, Seokhoon,Lee, Jun Yeob,Lee, Youngu,Yu, Gyeonghwa
-
-
- SILANE-GERMANE COMPOUND AND ORGANIC LIGHT EMITTING DIODE HAVING THE SAME
-
Disclosed in the present invention are a silane-germane compound and a light-emitting diode comprising the same. The silane-germane compound according to one embodiment of the present invention is represented by chemical formula 1, (B1)_3-M1-A-M2-(B2)_3. In the chemical formula 1, M1 and M2 are each independently silicon (Si) or germanium (Ge), and M1 and M2 are different from each other. Accordingly, the silane-germane compound shows high triplet energy (T1), a broad energy gap and a low HOMO value, and thus, when applied to an organic layer in light-emitting diodes, allows electron holes to move easily.(AA) Energy level (eV)COPYRIGHT KIPO 2017
- -
-
Paragraph 0158; 0160-0163
(2017/04/13)
-
- Condensed-cyclic compound and organic light emitting device comprising the same
-
Including the same fused ring compound and is disclosure is an organic light emitting device. (by machine translation)
- -
-
Paragraph 0335-0338
(2016/10/10)
-
- Highly thermally-stable 4,4′-bis(4″-triphenylsilylphenyl)-1,1′- binaphthalene as the ultraviolet amplified spontaneous emitter, efficient host and deep-blue emitting material
-
We report herein the synthesis and characterization of an efficient versatile binaphthyl derivative, 4,4′-bis(4″-triphenylsilylphenyl)-1,1′-binaphthalene (SiBN) with a high glass transition temperature of 159.3 °C. Its role as a lasing dye was demonstrated by the amplified spontaneous emission, which exhibited an ultraviolet peak of 397 nm with a low threshold of 20 μJ/pulse. Meanwhile, the lasing film and blue electroluminescent device employing this novel binaphthyl derivative as the host showed superior performances to the reference based on the conventional host 4,4′-bis(carbazol-9-yl)biphenyl. Finally, extremely stable colour-tunable deep-blue (436 nm/472 nm) organic electroluminescent devices based on SiBN were demonstrated with very high brightness (>7521.2 cd/m2) and high external quantum efficiencies (1.90% for 436 nm and 4.66% for 472 nm emission). The development of such functional versatility materials will be an effective method for reducing the cost of organic photoelectric devices.
- Li, Weiling,Xu, Tao,Chen, Guo,Zhakng, Hao,Gao, Xicun,Zhou, Xuehua,Huang, Haifang,Fan, Heliang,Cai, Miao,Zhang, Xiaowen,Yang, Lianqiao,Zhu, Wenqing,Wei, Bin
-
p. 266 - 272
(2016/04/05)
-
- Tuning the solid-state luminescence of bodipy derivatives with bulky arylsilyl groups: Synthesis and spectroscopic properties
-
Boron dipyrromethenes (BODIPYs) with bulky triphenylsilylphenyl(ethynyl) and triphenylsilylphenyl substituents on pyrrole sites were prepared via Hagihara-Sonogashira and Suzuki-Miyaura cross-coupling with ethynyl-terminated tetraphenylsilane and boronic acid-terminated tetraphenylsilane. The chromophores are designed to prevent intermolecular p-p stacking interaction and enhance fluorescence in the solid state. Single crystals of 1a and 2b for X-ray structural analysis were obtained, and weak p-p stacking interactions of the neighboring BODIPY molecules were observed. Spectroscopic properties of all of the dyes in various solvents and in films were investigated. Triphenylsilylphenyl-substituted BODIPYs generally show more pronounced increases in solid-state emission than triphenylsilylphenyl(ethynyl)-substituted BODIPYs. Although the simple BODIPYs do not exhibit any fluorescence in the solid state (F=0), arylsilyl-substituted BODIPYs exhibit weak to moderate solid-state fluorescence with quantum yields of 0.03, 0.07, 0.10, and 0.25. The structure-property relationships were analyzed on the basis of X-ray crystallography, optical spectroscopy, cyclic voltammetry, and theoretical calculations.
- Lu, Hua,Wang, Qiuhong,Gai, Lizhi,Li, Zhifang,Deng, Yuan,Xiao, Xuqiong,Lai, Guoqiao,Shen, Zhen
-
p. 7852 - 7861
(2012/09/07)
-
- New pyridopyrazine skelecton-based electron-transporting materials
-
2,3-Di(pyridine-2-yl)-7-(4-triphenylsilyl)phenyl)pyrido[2,3-b]pyrazine (DPPP) containing pyridopyrazine was designed and synthesized as a new electron-transporting material for organic lightemitting devices (OLEDs). The obtained material forms homogeneous and stable amorphous film. The new synthesized showed the reversible cathodic reduction for hole blocking material and the low reduction potential for electron transporting material in organic EL devices. The molecule possess excellent thermal stability with glass transition temperature (Tg) of 115 °C in nitrogen. DNTPD (60 nm)/NPD (30 nm)/CBP:Irppy 6% (40 nm)/BAlq (10 nm)/ETL (30 nm)/LiF (0.5 nm)/Al structured device were fabricated using DPPP as electron transport material. The maximum luminance reached at 25000 cd/m2. The current efficiency was 10.9 cd/A even high current. Copyright
- Kim, Ran,Oh, Dae Hwan,Hwang, Moon Chan,Baek, Jang Yeol,Shin, Sung Chul,Kwon, Soon-Ki,Kim, Yun-Hi
-
p. 4370 - 4374
(2012/09/22)
-
- NOVEL ORGANIC ELECTROLUMINESCENT COMPOUNDS AND ORGANIC ELECTROLUMINESCENT DEVICE USING THE SAME
-
Provided are novel organic electroluminescent compounds and organic electroluminescent devices using the same. Since the organic electroluminescent compound exhibits good luminous efficiency and excellent life property compared to the existing material, it may be used to manufacture OLED devices having superior operation life and consuming less power due to improved power efficiency.
- -
-
-
- NAPHTHYL CARBAZOLE DERIVATIVES, KL HOST MATERIAL, THE ORGANIC LIGHT EMITTING DEVICE EMPLOYING THE SAME, THE DISPLAY DEVICE AND THE ILLUMINATION DEVICE EMPLOYING THE SAME
-
Naphthylcarbazole derivatives are provided. The naphthylcarbazole derivatives are represented by Formula 1. Further provided are KL host materials, organic electroluminescent devices employing the host materials, and displays and lighting systems comprising the devices.
- -
-
-
- Dendritic Ir(III) complexes functionalized with triphenylsilylphenyl groups: Synthesis, DFT calculation and comprehensive structure-property correlation
-
We report on the synthesis, DFT calculations and structure-property relationships of phosphorescent Ir(iii) complexes with varied number and position of triphenylsilylphenyl substituents. The attachment of the dendritic triphenylsilylphenyl group at the pyridine part of the phenylpyridine ligand induced a stronger metal-to-ligand charge-transfer (MLCT) transition and lower band-gap energy than did the unfunctionalized complex, Ir(ppy)3. On the other hand, the attachment of the triphenylsilylphenyl group at the phenyl part of the phenylpyridine ligand induced a stronger ligand-centered (LC) transition. It was specifically found that the excited state intermolecular interactions, which give rise to non-radiative decay, were more efficiently suppressed when the triphenylsilylphenyl group was attached at the pyridine part of the phenylpyridine ligand and also when the number of substituents was increased. Such site-isolation effects and improved solubility due to the triphenylsilylphenyl group encapsulation made it possible to fabricate wet-processed polymer light-emitting devices from these functionalized Ir(iii) complexes. Both the doped poly(vinylcarbazole) (PVK) films and the neat films of our triphenylsilylphenyl based dendritic Ir(iii) complexes afforded moderate to high electrophosphorescence efficiencies with excellent phase homogeneity (4.1%/1.7% for Ir(TPSppy)3, 5.9%/2.5% for Ir(ppyTPS)3 and 1.8%/1.8% for Ir(TPSppyTPS)3 (doped polymer film/neat film, respectively)). Moreover, it is noteworthy that the triphenylsilylphenyl substituents greatly enhanced the thermal stability of the dendritic Ir(iii) complexes.
- Kim, Jae Jin,You, Youngmin,Park, Young-Seo,Kim, Jang-Joo,Park, Soo Young
-
p. 8347 - 8359
(2011/07/07)
-
- BIS-TRIPHENYLSILYL COMPOUNDS AND THEIR APPLICATION ON ORGANIC ELECTRONIC DEVICE
-
The present invention discloses a bis-triphenylsilyl compound and its applications as a host material, electron transport material, or hole transport material in an organic electronic device. The general structure of the bis-triphenylsilyl compound is as follows: where G represents any atomic moiety or single bond of the functional group selected from the group consisting of the following: aryl group, cyclene group, and heterocyclic ring group; and R1?R32 represent substituents on aryl groups.
- -
-
Page/Page column 3-4
(2009/05/28)
-
- NAPHTHYL CARBAZOLE DERIVATIVES, KL HOST MATERIAL, THE ORGANIC LIGHT EMITTING DEVICE EMPLOYING THE SAME, THE DISPLAY DEVICE AND THE ILLUMINATION DEVICE EMPLOYING THE SAME
-
Naphthylcarbazole derivatives are provided. The naphthylcarbazole derivatives are represented by Formula 1. Further provided are KL host materials, organic electroluminescent devices employing the host materials, and displays and lighting systems comprising the devices.
- -
-
Page/Page column 28
(2008/12/04)
-
- A deep red phosphorescent Ir(III) complex for use in polymer light-emitting diodes: Role of the arylsilyl substituents
-
(Figure Presented) Here we report the synthesis and electrophosphorescence of a new deep-red phosphorescent Ir(III) complex with spatially embracing and thus solubilizing arylsilyl-substituted ligands, Ir(III) tris(2-(2′- benzo[b]thienyl)-5-(4′-triphenylsilylphenyl)pyridinato-N,C 3′). A poly(N-vinylcarbazole) (PVK) film doped with this Ir(III) complex exhibited excellent phase homogeneity and showed saturated red electrophosphorescence of 2.7% maximum external quantum efficiency, whose Commission Internationale de L'Eclairage coordinates were (0.69, 0.30).
- You, Ngmin,An, Cheng-Guo,Kim, Jang-Joo,Soo, Young Park
-
p. 6241 - 6246
(2008/02/09)
-
- Silane- and triazine-containing hole and exciton blocking material for high-efficiency phosphorescent organic light emitting diodes
-
One of the important factors for high efficiency phosphorescent organic light-emitting devices is to confine triplet excitons within the emitting layer. We synthesized and characterized a new hole blocking material containing silane and triazine moieties, 2,4-diphenyl-6-(4′-triphenylsilanyl-biphenyl-4-yl) -1,3,5-triazine (DTBT). Electrophosphorescent devices fabricated using the material as the hole-blocking layer and N,N′-dicarbazolyl-4,4′- biphenyl (CBP) doped with fac-tris(2-phenylpyridine)iridium [Ir(ppy) 3] as the emitting layer showed a maximum external quantum efficiency (ηext) of 17.5% with a maximum power efficiency (ηp) of 47.8 lm W-1, which are much higher than those of devices using bathcuproine (BCP) (ηext = 14.5%, ηp = 40.0 lm W-1) and 4-biphenyloxolate aluminium(iii) bis(2-methyl-8-quinolinato)-4-phenylphenolate (BAlq) (ηext = 8.1%, ηp = 14.2 lm W-1) as hole-blocking layers. The Royal Society of Chemistry.
- Kang, Jae-Wook,Lee, Deug-Sang,Park, Hyung-Dol,Park, Young-Seo,Kim, Ji Whan,Jeong, Won-Ik,Yoo, Kyung-Mo,Go, Kyoungmoon,Kim, Se-Hoon,Kim, Jang-Joo
-
p. 3714 - 3719
(2008/12/21)
-
- Silicon-containing dendritic tris-cyclometalated Ir(iii) complex and its electrophosphorescence in a polymer host
-
In this paper, we present the synthesis and characterization of a new highly phosphorescent cyclometalated Ir(iii) complex with a silane-based dendritic substituent. The Ir(iii) complex showed 74 ± 3% of absolute phosphorescence quantum efficiency in the film state. In addition, efficient electrophosphorescence (32.8 cd A-1) employing an Ir(iii) complex-poly(N-vinylcarbazole) system device is observed. Study of a series of electroluminescent, spectroscopic, and electrochemical data of the Ir(iii) complex and the reference Ir(ppy)3 reveals superior performance of the new Ir(iii) complex. The Royal Society of Chemistry.
- You, Youngmin,An, Cheng-Guo,Lee, Deug-Sang,Kim, Jang-Joo,Park, Soo Young
-
p. 4706 - 4713
(2007/10/03)
-