The present disclosure provides a polymer represented by the following general formula (I): ##STR00001## wherein x and y each represent a repeating unit, and both x and y are positive integers; formula ##STR00002##
and formula ##STR00003##
are each independently selected from the group consisting of an aryl containing 5-40 ring atoms and a heteroaryl containing 5-40 ring atoms; formula ##STR00004##
is a linking group, and formula ##STR00005##
is selected from the group consisting of alkyl, alkoxy, amino, alkenyl, alkynyl, aralkyl, and heteroalkyl; and R2, R3 and R4 are each independently selected from the group consisting of H, D, F, CN, alkyl, fluoroalkyl, aryl, heteroaryl, amino, Si, germyl, alkoxy, aryloxy, fluoroalkoxy, siloxane, siloxy, deuterated alkyl, deuterated fluoroalkyl, deuterated aryl, deuterated heteroaryl, deuterated amino, deuterated silyl, deuterated germyl, deuterated alkoxy, deuterated aryloxy, deuterated fluoroalkoxy, deuterated siloxane, and deuterated siloxy.

The present specification relates to a compound represented by Chemical Formula 1, a coating composition comprising the compound represented by Chemical Formula 1, an organic light emitting device using the same, and a method for manufacturing the same.

The present specification provides a copolymer including a unit of Chemical Formula 1 and a unit of Chemical Formula 2; and an organic light emitting device including the same.

A light emitting device having an anode, a cathode, a first organic layer disposed between the anode and the cathode and a second organic layer disposed between the anode and the cathode is provided. The first organic layer is a layer containing a compound (T) in which the absolute value of the difference between the energy level at the lowest triplet excited state and the energy level at the lowest singlet excited state is 0.5 eV or less and not containing a phosphorescent metal complex. The second organic layer is a layer containing a crosslinked body of a polymer compound containing a crosslink constitutional unit and the energy level at the lowest triplet excited state of the polymer compound is 2.25 eV or more.

A copolymer having a structural unit represented by Chemical Formula 1 is provided. The copolymer may improve performance, e.g., luminous efficiency, of an electroluminescence device.

##STR00001##

In Chemical Formula 1, the definition of each substituent is as described in the detailed description.

The present invention relates to certain fluorenes, to the use of the compounds in an electronic device, and to an electronic device comprising at least one of these compounds. The present invention furthermore relates to a process for the preparation of the compounds and to a formulation and composition comprising one or more of the compounds.

A composition for a light-emitting element contains a host material and a guest material. The host material is a compound containing at least one of an aromatic hydrocarbon group and a heterocyclic group and the guest material is a compound having a condensed heterocyclic group containing at least one of a boron atom, an oxygen atom, a sulfur atom, a selenium atom, an sp.sup.3 carbon atom, and a nitrogen atom in a ring. A difference ΔE between an energy value at the maximum peak of a emission spectrum of the host material at 25° C. and an energy value at a peak on the lowest energy side of an absorption spectrum of the guest material at 25° C. is 0.50 eV or less, and a difference ΔS between an energy value at the maximum peak of an emission spectrum of the guest material at 25° C. and an energy value at the maximum peak of an emission spectrum of the guest material at 77 K is 0.10 eV or less.

A film for a light emitting device which is useful for producing a light emitting device having excellent luminance life is described. The film contains a cross-linked body of a crosslinkable material having a crosslinking group in an amount of 0.015 mmol/g to 0.05 mmol/g. A light emitting device containing the film is also described. A method for analyzing a crosslinking group in a film for a light emitting device involves: (1) a step of swelling the above-described film for a light emitting device with a solvent, and (2) a step of measuring a crosslinking group of the swollen film for a light emitting device using nuclear magnetic resonance spectroscopy.

Resins comprising nanoparticles formed from π-conjugated cross-linked polymers are disclosed, together with their methods of manufacture and their applications in light emitting devices.

Compounds useful dopants for light emitting diodes and light emitting display devices are disclosed. The compounds have the following structure (Formula I): ##STR00001##
wherein R.sub.1a, R.sub.1b, R.sub.2a, R.sub.2b, Z.sub.1, Z.sub.2, X and Y are as defined herein. Light emitting diodes including the compounds of Formula I, light emitting devices including the same as well as methods associated with preparation and use of such compounds and devices are also provided.