- Yellow electrophosphorescent devices with hosts containing N1-(naphthalen-1-yl)-N1,N4-diphenylnaphthalene-1,4-diamine and tetraphenylsilane units
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Two novel host materials, N1-(naphthalen-1-yl)-N1,N4-diphenyl-N4-(4-(triphenylsilyl)phenyl) naphthalene-1,4-diamine (SiP) and N1-(naphthalen-1-yl)-N1,N4-diphenyl-N4-(3-(triphenylsilyl) phenyl)naphthalene-1,4-diamine (SiM), were synthesised by incorporating a hole-transporting moiety, N1-(naphthalen-1-yl)-N1,N4-diphenylnaphthalene-1,4-diamine (NPNA2) and typical electron-transporting tetraphenylsilane moiety. SiP and SiM materials exhibit high thermal and morphological stability with a glass transition temperature higher than 110°C and decomposition temperature above 350°C. Using Ir(bt)2(acac) (bis(2-phenylbenzothiozolato-N,C2′)iridium(acetylacetonate)) as an emitter, yellow phosphorescent organic light-emitting diodes of ITO/TAPC (1,1-bis[4-(di-p-tolylamino)phenyl]cyclohexane, 40 nm)/host: Ir(bt)2(acac) (15 wt%, 20 nm)/TmPyPB (1,3,5-tri(m-pyrid-3-yl-phenyl)benzene, 40 nm)/LiF (1 nm)/Al (100 nm) show maximum current and power efficiency of 40.81 cd A-1 and 33.60 lm W-1 with low efficiency roll-off. The current efficiency of 40.10 cd A-1 is still observed at the practically useful brightness value of 1000 cd m-2.
- Zhang, Song,Xu, Qiu-Lei,Jing, Yi-Ming,Liu, Xuan,Lu, Guang-Zhao,Liang, Xiao,Zheng, You-Xuan,Zuo, Jing-Lin
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Read Online
- Organic electroluminescent materials and devices
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The invention relates to organic electroluminescent materials and devices. Provided are boron-containing compounds. Also provided are formulations comprising these boron-containing compounds. Further provided are OLEDs and related consumer products that utilize these boron-containing compounds.
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Paragraph 0362-0363
(2021/04/28)
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- ORGANIC ELECTROLUMINESCENT MATERIALS AND DEVICES
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Provided are boron-containing compounds. Also provided are formulations comprising these boron-containing compounds. Further provided are OLEDs and related consumer products that utilize these boron-containing compounds.
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Paragraph 0194; 0195
(2021/04/30)
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- Heterocyclic compound and organic electroluminescence device including the same
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Provided is a heterocyclic compound represented by Formula 1 below, and an organic electroluminescence device including the same in an emission layer. In Formula 1, X is a direct linkage or CR2R3 , Z1to Z8 are each independently CR4 or N, at least two of
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Paragraph 0221; 0222; 0223; 0224
(2019/02/21)
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- New organic electroluminescent compounds and the use of the compound of the organic electroluminescent device
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Provided are a novel organic electroluminescent compound and an organic electroluminescent device using the same. When used as a host material of an organic electroluminescent material of an OLED device, the organic electroluminescent compound disclosed herein exhibits good luminous efficiency and excellent life property as compared to the existing host material. Therefore, it may be used to manufacture OLEDs having very superior operation life.
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Paragraph 0053; 0060; 0061
(2016/10/07)
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- Organic electroluminescent device employing organic light emitting compound as light emitting material
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Provided is an organic electroluminescent device that exhibits an efficient host-dopant energy transfer mechanism, and thus, expresses a certain high-efficiency electroluminescent performance, based on improved electron density distribution. The organic electroluminescent device also overcomes low initial efficiency and short operation life property, and secures high-performance electroluminescent performance with high efficiency and long life property for each color.
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Paragraph 0071
(2015/04/15)
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- Novel organic electroluminescent compounds and organic electroluminescent device using the same
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The present invention relates to a novel organic light-emitting compound and an organic electroluminescent device containing the same. More specifically, the organic light-emitting compound according to the present invention is selected from the following chemical formula 1 to 6. andlt;Img id = andPrime;i0030andPrime; he = andPrime;86andPrime; wi = andPrime;125andPrime; file = andPrime;pat00030.jpgandPrime; img-format = andPrime;jpgandPrime; /andgt; [In formula 1 to 6, X and Y are each independently selected from N (R_1), C (R_2) (R_3) and Si (R_4) (R_5), wherein one of either X or Y must be N (R_1); the other is C (R_2) (R_3) or Si (R_4) (R_5); and Z_1 to Z_8 are each independently selected from C (R_6) and N, wherein R_6 can be different from each other and adjacent R_6 may be bonded to each other to form a ring.] The organic light-emitting compound according to the present invention is used as a host material of the organic light-emitting material in OLED devices and shows good luminous efficiency and excellent life properties of material, compared with conventional host materials, thereby being advantageous in producing an OLED having a very good operating life.COPYRIGHT KIPO 2015
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Paragraph 0045; 0052; 0053
(2017/04/14)
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- NOVEL ORGANIC ELECTROLUMINESCENT COMPOUNDS AND ORGANIC ELECTROLUMINESCENT DEVICE USING THE SAME
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Provided are novel organic electroluminescent compounds and an organic electroluminescent device using the same. Since the organic electroluminescent compound exhibits good luminous efficiency and excellent life property compared to the existing host material, it may be used to manufacture OLED devices having very superior operation life and consuming less power due to improved power efficiency.
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Page/Page column 15
(2011/09/15)
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- Synthesis and characterization of a new series of blue fluorescent 2, 6-linked 9, 10-diphenylanthrylenephenylene copolymers and their application for polymer light-emitting diodes
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A series of new 9, 10-diphenylanthracene-based, 2, 6-linked blue-light-emitting copolymers bearing hole- or electron-transporter as well as bulky substituent were successfully synthesized. Photophysical, thermal, electrochemical, and electroluminescence (EL) properties of these copolymers were studied and characterized. Bright and efficient blue fluorescence in the solid state was achieved by incorporating bulky substituent into the copolymer backbone. Both hole- and electron-transport-substituted copolymers apparently enhanced the electroluminescent performance of their polymeric light-emitting diodes (PLEDs). A diphenylvinyl-bearing copolymer (pDPV) PLED exhibited sky-blue EL (λETmax=473 nm, CIEx,y=0.16,0.28) with peak luminous efficiency of 2.21 cd/A; a N-carbazole bearing copolymer (pCBZ) PLED displayed a blue EL (λELmax469 nm, CIEx,y=0.15, 0.22) with peak luminous efficiency of 2.15 cd/A OXD-7 (1,3-bis(2-(4-tertbutylphenyl)-1,3,4-oxadiazol-5-yl)benzene) as an electron-transporting dopant was found to improve the performance of PLED significantly. A better balanced hole/electron charge carrier was ascribed to electrontransporting, 1, 3, 4-oxadiazole-bearing copolymer (pOXD) PLED. It showed a very mild efficiency rolls off: only 0.13 cd/A luminous efficiency drops from current densities of 10-100 mA/cm2, corresponding to EL brightness of 169-1558 cd/m2.
- Chen, Hung-Yang,Chen, Chin-Ti,Chen, Chao-Tsen
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experimental part
p. 3613 - 3623
(2011/10/09)
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