56525-79-2Relevant academic research and scientific papers
High-performance sky-blue phosphorescent organic light-emitting diodes employing wide-bandgap bipolar host materials with thermally activated delayed fluorescence characteristics
Zhang, Yuan-Lan,Ran, Quan,Wang, Qiang,Tian, Qi-Sheng,Kong, Fan-Cheng,Fan, Jian,Liao, Liang-Sheng
, (2020)
Up to date, several kinds of thermally activated delayed fluorescence (TADF) host molecules have been rapidly developed to fulfill the increasing demand of high-efficiency phosphorescent organic light-emitting diodes (PHOLEDs). Herein, three wide-bandgap TADF materials BPCN-Cz2Ph, BPCN-2Cz, and BPCN-3Cz are newly designed and synthesized as host materials for sky-blue PHOLEDs. By modulation of carbazole-units in the molecular skeleton, we find that the optimized molecules can realize both high triplet energies and balanced carrier transport properties with obvious TADF properties. The sky-blue PHOLEDs with ultralow phosphor doping ratio employing BPCN-Cz2Ph, BPCN-2Cz, and BPCN-3Cz as host materials demonstrate really high performance with alleviated roll-offs and achieve impressive current efficiencies (CEs) of 46.5 cd A?1, 50.0 cd A?1, and 34.5 cd A?1, power efficiencies (PEs) of 40.6 lm W?1, 46.8 lm W?1, and 34.8 lm W?1, and external quantum efficiencies (EQEs) of 22.2%, 24%, and 15.8%, respectively. More encouragingly, even at an applied luminance of 1000 cd m?2, the EQEs could maintain high levels of 21.0%, 21.5% and 12.8%, respectively, which represents the potential utility value of the new family of these molecules in blue PHOLEDs. Our molecular design strategy provides a practical way to construct promising wide-bandgap TADF host materials with an excellent combination of TADF property, high triplet energy, and balanced carrier-transporting ability for high-performance devices.
Heterocyclic compound and organic electroluminescent device thereof
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Paragraph 0125; 0131-0132, (2021/10/05)
The invention provides a heterocyclic compound and an organic electroluminescent device thereof. Relates to the technical field of organic photoelectric materials. In order to solve the problem that the light extraction efficiency caused by total reflecti
COMPOUND FOR ORGANIC ELECTRONIC ELEMENT, ORGANIC ELECTRONIC ELEMENT USING THE SAME, AND A ELECTRONIC DEVICE THEREOF
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, (2020/05/30)
The present invention relates to a novel compound, an organic electric element using the same, and an electronic device thereof. According to the present invention, a luminous efficiency, a color purity and a lifespan of the element can be improved and a driving voltage can be lowered. The organic electric element comprises: an anode; a cathode; and an organic material layer formed between the anode and the cathode.
Visible light delayed fluorescence material containing pyridinotriazole and derivative receptor structural units, and application thereof
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Paragraph 0067-0069, (2020/09/23)
The invention provides an organic delayed fluorescence luminescent material based on a pyridinotriazole and pyridinotriazole derivative receptor structure, and application thereof. The organic luminescent material is a receptor-donor separation system, wh
1,Ω - bis (3, 6 - diarylcarbazole)-alkane and preparation method thereof
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Paragraph 0030-0040; 0133; 0134; 0201; 0202, (2020/07/24)
The invention relates to 1,omega-bis(3,6-diaryl carbazolyl)-alkane. The 1,omega-bis(3,6-diaryl carbazolyl)-alkane is of a structure (described in the specification), wherein Ar is phenyl, p-methylphenyl, alpha naphthyl or beta naphthyl; and R is ethyl, pr
Organic compound taking carbazole as core as well as preparation method and application thereof
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, (2020/06/20)
The invention relates to an organic compound taking carbazole as a core as well as a preparation method and application thereof, and belongs to the technical field of semiconductors, and the compoundhas a structure as shown in a general formula (1). The i
Carbazole derivatives and application of carbazole derivatives in electroluminescent device
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Paragraph 0056-0058, (2019/11/28)
The invention discloses carbazole derivatives represented by formulas (1)-(3), and also discloses application of the carbazole derivatives as a host material in an OLED organic light-emitting layer orapplication of the carbazole derivatives in preparation of an electroluminescent device. The carbazole derivatives have a high triplet state, exhibits bipolar transport properties at the same time, and has high carrier mobility, matching of electron holes is more balanced, and exciton formation is facilitated; and when the carbazole derivatives are applied to the organic electroluminescent blue-light device, excellent performance, low voltage and high efficiency are achieved.
COMPOUND, THIN FILM COMPRISING THE COMPOUND AND MENUFACTURING METHOD OF THE THIN FILM, AND ORGANIC LIGHT EMITTING DEVICE COMPRISING THE COMPOUND
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Paragraph 0092-0096, (2019/06/11)
In a compound, a thin film comprising the same, a method for manufacturing the thin film, and an organic light emitting device comprising the compound of the present invention, the compound of the present invention is represented by chemical formula 1. In the chemical formula 1, each of X_1, X_2, X_3, and X_4 independently represents hydrogen (H), aryl, diarylamine, or tert-butyl. A purpose of the present invention to provide the compound which contains a styrene group at the terminal thereof, has excellent solubility, and can be thermally cured at a low temperature.COPYRIGHT KIPO 2019
Aggregation-induced emission (AIE)-active highly emissive novel carbazole-based dyes with various solid-state fluorescence and reversible mechanofluorochromism characteristics
Zhao, Fei,Chen, Zhao,Fan, Congbin,Liu, Gang,Pu, Shouzhi
, p. 390 - 397 (2019/02/12)
Three new carbazole-based fluorescent molecules 1–3 functionalized with tetraphenylethene have been successfully synthesized, and these compounds have high thermal stability, and they exhibited different fluorescence in solid states with the superior lumi
Synthesis of N-Alkyl and N-H-Carbazoles through SNAr-Based Aminations of Dibenzothiophene Dioxides
Kaga, Atsushi,Nogi, Keisuke,Yorimitsu, Hideki
supporting information, p. 14780 - 14784 (2019/11/13)
Alkyl amines have become available for the synthesis of diverse N-alkyl carbazoles through twofold SNAr aminations of dibenzothiophene dioxides by using alkali metal bases. Of particular importance is the choice of counter cations on alkali metal bases, that is, i) the use of Li base for the efficient intermolecular reaction and ii) the sequential addition of heavier alkali metal bases (Na, K, or Cs) to promote intramolecular cyclization in a one-pot manner. This protocol also enables the cascade synthesis of N-H-carbazoles by using 2-phenylethylamine by removal of the 2-phenethyl group from N-(2-phenethyl) carbazoles in a single operation.
