- Blue light organic small molecule based on triplet state-triplet state annihilation mechanism and application thereof
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The invention belongs to the field of luminescent materials, and discloses a blue light organic small molecule based on a triplet state-triplet state annihilation mechanism and application thereof. The structural formula of the blue light organic small molecule is shown as P1n, P2n, P3n or P4n. The blue light organic small molecules can still keep high device efficiency under high brightness as alight-emitting layer, can be used for non-doped devices, is beneficial to simplifying the device structure and reducing the device manufacturing cost, and overcomes the problem of serious efficiency roll-off of a metal complex phosphorescent material under high brightness. In addition, the introduction of cyano groups can enhance the interaction between molecules, and is beneficial to improving the efficiency of TTA, thereby further improving the performance of the device.
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Paragraph 0036; 0040-0041
(2020/07/27)
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- Pyrene structure-containing compound, and organic luminescent device thereof
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The invention discloses a pyrene structure-containing compound, and an organic luminescent device thereof. The pyrene structure-containing compound is formed through combination of a pyrene ring structure with a fluorene alkenyl; on one hand, a foldable three dimensional structure is achieved, so that certain distortion of the pyrene structure-containing compound in the space three-dimensional structure is realized, and the film forming performance is improved; on the other hand, the pyrene structure possesses relatively high triplet state energy level and relatively wide energy gap, and excellent blue light performance, when the pyrene ring structure is connected with fluorene alkenyl with electron withdrawing performance, green light or red light is emitted after bathochromic shift. Thepyrene structure-containing compound possesses appropriate HOMO and LUMO values, is capable of blocking transmission from cavities to electron transmission layers, and improving effective luminescence. When the pyrene structure-containing compound is applied in organic luminescent devices, the pyrene structure-containing compound is taken as a luminescent layer or a cavity blocking layer, low driving voltage and high luminescent efficiency of the organic luminescent devices are achieved.
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Paragraph 0113; 0114; 0118; 0119
(2019/01/21)
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- Novel organic electroluminescent compound and organic electroluminescent device containing compound
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The invention provides a novel organic electroluminescent compound and an organic electroluminescent device containing the compound. The structure of the organic electroluminescent compound provided by the invention is as shown in the specification. The organic electroluminescent compound can serve as multiple kinds of materials such as a blue doped material, a hole-transport material and an electronic barrier material to be used in the organic electroluminescent device, and also to achieve the effects of reducing driving voltage, improving the luminous efficiency, brightness, thermal stability and color purity of the device and prolonging the device lifetime. Meanwhile, the organic electroluminescent device using the organic electroluminescent compound provided by the invention has excellent properties of high efficiency and long lifetime.
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Paragraph 0065; 0078-0081
(2018/06/26)
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- Semiconducting Material Comprising a Phosphine Oxide Matrix and Metal Salt
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The present invention is directed to a semiconducting material comprising: i) a compound according to formula (I) wherein R1, R2 and R3 are independently selected from C1-C30-alkyl, C3-C30 cycloalkyl, C2-C30-heteroalkyl, C6-C30-aryl, C2-C30-heteroaryl, C1-C30-alkoxy, C3-C30-cycloalkyloxy, C6-C30 aryloxy, and from structural unit having general formula E-A-, wherein—A is a C6-C30 phenylene spacer unit, and—E is an electron transporting unit that is selected from C10-C60 aryl and C6-C60 heteroaryl comprising up to 6 heteroatoms independently selected from O, S, P, Si and B and that comprises a conjugated system of at least 10 delocalized electrons, and—at least one group selected from R1, R2 and R3 has the general formula E-A-; and ii) at least one complex of a monovalent metal having formula (II) wherein—M+ is a positive metal ion bearing a single elementary charge, and each of A1, A2, A3 and A4 is independently selected from H, substituted or unsubstituted C6-C20 aryl and substituted or unsubstituted C2-C20 heteroaryl, wherein a heteroaryl ring of at least 5 ring-forming atoms of the substituted or unsubstituted C2-C20 heteroaryl comprises at least one hetero atom selected from O, S and N.
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- Bioorthogonal Diversification of Peptides through Selective Ruthenium(II)-Catalyzed C–H Activation
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Methods for the chemoselective modification of amino acids and peptides are powerful techniques in biomolecular chemistry. Among other applications, they enable the total synthesis of artificial peptides. In recent years, significant momentum has been gained by exploiting palladium-catalyzed cross-coupling for peptide modification. Despite major advances, the prefunctionalization elements on the coupling partners translate into undesired byproduct formation and lengthy synthetic operations. In sharp contrast, we herein illustrate the unprecedented use of versatile ruthenium(II)carboxylate catalysis for the step-economical late-stage diversification of α- and β-amino acids, as well as peptides, through chemo-selective C?H arylation under racemization-free reaction conditions. The ligand-accelerated C?H activation strategy proved water-tolerant and set the stage for direct fluorescence labelling as well as various modes of peptide ligation with excellent levels of positional selectivity in a bioorthogonal fashion. The synthetic utility of our approach is further demonstrated by twofold C?H arylations for the complexity-increasing assembly of artificial peptides within a multicatalytic C?H activation manifold.
- Schischko, Alexandra,Ren, Hongjun,Kaplaneris, Nikolaos,Ackermann, Lutz
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supporting information
p. 1576 - 1580
(2017/02/05)
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- Phosphine oxide functionalized pyrenes as efficient blue light emitting multifunctional materials for organic light emitting diodes
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In a search for blue light emitting multifunctional materials, the electron transport enhancing diphenyl phosphine-oxide (Ph2PO) group has been appended to blue light emitting pyrene derivatives. This design, we observe, leads to highly efficient electron transporting blue-emitters for non-doped organic light emitting devices (OLEDs) with good film formation characteristics. The superior performance is attributed to enhanced charge transport and formation of pyrene excimers assisted by thermally activated delayed fluorescence (TADF) in the device. We report the synthesis and characterization using experimental and computational methods of six such pyrene derivatives. Although three of these derivatives show quenching of luminescence in solvents at higher concentrations, in the thin film invariably all six of them exhibit typical pyrene excimer emission. X-ray crystal analysis reveals π-π stacking and the C-H...O interactions in the solid due to the PO group. The measured electron mobilities for all the compounds are higher in comparison to the standard electron transport material, Alq3. Non-doped OLEDs with the pyrene derivatives as emitters (multi-layer configuration) as well as electron transport cum emitters (bilayer configuration) exhibit excellent efficiencies. The derivatives as emitters display a performance with current efficiencies (ηc) in the range 21.1-30.1 cd A-1, power efficiencies (ηp) 11.0-15.76 lm W-1, external quantum efficiencies (EQE) 7.2-9.1% and brightness 28500-42750 cd m-2. In addition, the derivatives as electron transporting emitters demonstrate very good external quantum efficiencies in the range of 3.0-4.0%. These results demonstrate a successful strategy to obtain blue light emitting multifunctional materials for OLED applications.
- Mallesham, Godumala,Swetha, Chidirala,Niveditha, Surukonti,Mohanty, Maneesha Esther,Babu, Nanubolu Jagadeesh,Kumar, Arunandan,Bhanuprakash, Kotamarthi,Rao, Vaidya Jayathirtha
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p. 1208 - 1224
(2015/02/19)
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- INDENOTRIPHENYLENE DERIVATIVES AND ORGANIC LIGHT EMITTING DEVICE USING THE SAME
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The present invention discloses a new indenotriphenylene derivatives and organic light emitting device using the derivatives. The organic light emitting device employing new indenotriphenylene derivatives as host material can lower driving voltage, prolong half-lifetime, increasing efficiency. The new indenotriphenylene derivatives are represented by the following formula (A): Wherein A1, A2 are substituted or unsubstituted fused ring hydrocarbon units with one to five rings. Preferably A1, A2 are phenyl group, naphthyl group, anthracenyl group, pyrenyl group, chrysenyl group. Perylenyl group. R1 to R4 are identical or different. R1 to R4 are independently selected from the group consisting of a hydrogen atom, a halide, alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted aralkyl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 6 to 30 carbon atoms. X is selected from carbon atom or nitrogen atom.
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Paragraph 0027-0028
(2014/05/20)
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- NOVEL NITROGEN-CONTAINING HETEROCYCLIC COMPOUND AND ORGANIC ELECTRONIC DEVICE USING THE SAME
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The present invention provides a novel nitrogen-containing heterocyclic derivative and an organic electronic device using the same. The organic electronic device according to the present invention has excellent properties in terms of efficiency, driving voltage, and a life span.
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Page/Page column 71
(2011/05/05)
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- POLYCYCLIC AROMATIC COMPOUND, MATERIAL FOR FORMING LUMINESCENT COATING FILM AND ORGANIC ELECTROLUMINESCENT DEVICE USING SAME
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Disclosed are a novel polycyclic aromatic compound having a specific structure and a material for forming a luminescent coating film which is composed of an organic solvent solution containing such a polycyclic aromatic compound. Also disclosed is an organic electroluminescent (EL) device wherein an organic thin film layer composed of one or more layers including at least a light-emitting layer is interposed between a cathode and an anode. Such an organic EL device has high luminous efficiency and long life, since the polycyclic aromatic compound is contained, by itself or as a component of a mixture, in at least one layer of the organic thin film layer of the organic EL device.
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Page/Page column 27-28
(2010/11/26)
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- FLUORENE DERIVATIVE AND ORGANIC ELECTROLUMINESCENT DEVICE USING SAME
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Disclosed is a fluorene derivative having a specific structure. Also disclosed is an organic electroluminescent device having high luminous efficiency wherein an organic thin film layer composed of one or more layers including at least a light-emitting layer is interposed between a cathode and an anode. At least one layer of the organic thin film layer contains the fluorene derivative of the specific structure alone or as a component of a mixture. Such an organic electroluminescent device with high luminous efficiency can be realized by this fluorene derivative.
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Page/Page column 51
(2008/06/13)
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- ORGANIC ELECTROLUMINESCENT ELEMENT
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The novel compound of the present invention has the diphenylanthracene structure at the center and a specific structure substituted with an aryl group at end portions. The organic electroluminescence device of the present invention comprises a plurality of layers of thin films of organic compounds which comprise a light emitting layer or a plurality of layers comprising a light emitting layer and are disposed between a pair of electrodes and at least one of the layers of thin films of organic compounds comprises the above novel compound. The novel compound exhibits excellent efficiency of light emission and heat resistance, has a long life and emits bluish light having excellent purity of color and the organic electroluminescence device comprises the novel compound and exhibits the same advantageous properties.
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- Synthesis of pyrene containing building blocks for dendrimer synthesis
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Efficient syntheses of the novel, pyrene containing branched building blocks 10, 13, 22, 25 and of a pyrene based core molecule 16 for the construction of dendrimers are reported. The main tool is a Suzuki cross-coupling. The functional groups for further growth are amines and carboxylic acids, which were used in an orthogonally protected fashion. It was proven that the building blocks could be assembled to a low generation dendrimer 17.
- Modrakowski,Flores,Beinhoff,Schlueter
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p. 2143 - 2155
(2007/10/03)
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