The present specification relates to a fluorene-based compound of Chemical Formula 1, a coating composition including the fluorene-based compound of Chemical Formula 1, an organic light emitting device using the same, and a manufacturing method thereof

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wherein X1 to X4, L1, L2, R1 to R6, Ar1, Ar2, m1, m2, and n1 to n6 are described herein.

The present disclosure provides a quantum dot (QD) light emitting diode including: a first electrode and a second electrode facing each other; a QD emitting material layer positioned between the first electrode and the second electrode and including a QD; a hole auxiliary layer positioned between the first electrode and the QD emitting material layer; and an electron transporting layer positioned between the QD emitting material layer and the second electrode and including an electron-property material and a hole-property material.

It is an object of the present invention to provide a polymer organic EL element that has a low driving voltage, high light emission efficiency, and a long lifespan. The present invention provides an organic electroluminescence element having a pair of electrodes and at least one organic layer between the electrodes, wherein the organic layer is constituted by two or more high molecular weight compounds including at least high molecular weight compounds α and β, and the high molecular weight compound α has a substituted triarylamine structural unit represented by a general formula (1) below and has a weight average molecular weight of 10,000 or more and less than 1,000,000 in terms of polystyrene. For the symbols in the formula, see the Description.

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Water-soluble fluorescent polymeric dyes and polymeric tandem dyes are provided. The polymeric dyes include a water solvated light harvesting multi-chromophore having a conjugated segment of aryl and/or heteroaryl co-monomers. The molar ratio of the co-monomers can be adjusted to provide beneficial technical properties, such as increased water solubility and improved absorption and emission spectra. For instance, the conjugated segment can have a first co-monomer substituted with a water-soluble group (WSG) and a second co-monomer, wherein the first co-monomer is in an amount that is equal or greater than the amount of the second co-monomer, multi-chromophore. The polymeric tandem dyes further include a signaling chromophore covalently linked to the multi-chromophore in energy-receiving proximity therewith. Also provided are aggregation-resistant labeled specific binding members that include the subject water-soluble polymeric dyes. Methods of evaluating a sample for the presence of a target analyte and methods of labeling a target molecule in which the subject polymeric dyes find use are also provided. Systems and kits for practicing the subject methods are also provided.

As a means for providing an electroluminescent device capable of achieving high luminance, high efficiency, and at the same time excellent device life-span, a polymer having an overlap index of greater than or equal to about 0.00001 and less than or equal to about 1.8, and a polymer including a structural unit represented by Chemical Formula (1) are provided:

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The present disclosure relates to a polymer including a unit represented by Chemical Formula 1 and a unit represented by Chemical Formula 2, a coating composition including the polymer, and an organic light emitting device formed using the same.

An electroluminescent device and a display device including the device are disclosed, wherein the electroluminescent device includes a first electrode; a hole transport layer disposed on the first electrode; an emission layer disposed on the hole transport layer, the emission layer including quantum dots; a self-assembled monomolecular layer disposed on the emission layer, the self-assembled monomolecular layer including self-assembled monomolecules; an electron transport layer disposed on the self-assembled monomolecular layer; and a second electrode disposed on the electron transport layer.

An electroluminescent device includes a first electrode and a second electrode facing each other, and a light emitting layer disposed between the first electrode and the second electrode, where the light emitting layer includes a first light emitting layer including a first quantum dot and a second light emitting layer including a second quantum dot and an n-type metal oxide.

A polymer solar cell including a cathode buffer layer (CBL) is proposed. the CBL may include a reaction product between a conjugate polymer electrolyte and an acid derivative, the conjugate polymer electrolyte is poly [(9,9-bis 3′-(N,N-dimethylamino) propyl)-2,7-fluorene)-alt-2,7-(9,9-dihexylfluorene)] (PFN), and the acid derivative is trifluoroacetic acid (CF3AA), 4-trifluoromethyl benzoic acid (CF3BA), or 4-toluene sulfonic acid (TsOH). The CBL including the conjugate polymer electrolyte (PFN) modified with a specific acid derivative may improve short-circuit current (J.sub.sc) and a filling factor (FF) simultaneously, and thus, significantly improved efficiency is exhibited.

An infrared absorption composition includes a p-type semiconductor compound including a first structural unit represented by Chemical Formula 1 and a second structural unit including an electron donating moiety; and an n-type semiconductor compound represented by Chemical Formula 2:

##STR00001## wherein, in Chemical Formula 1, Ar.sup.1, X, R.sup.1a, and R.sup.2a are the same as defined in the detailed description. In Chemical Formula 2, A.sup.1, A.sup.2, D.sup.1, D.sup.2, and D.sup.3 are the same as defined in the detailed description.