The present application relates to alkylpyridinium substituted coumarin dyes and their uses as fluorescent labels. For example, these dyes may be used to label nucleotides for nucleic acid sequencing applications.

The present disclosure relates to organic electroluminescent compounds and an organic electroluminescent device comprising the same. The organic electroluminescent compound according to the present disclosure may be comprised in a light-emitting layer or an electron buffer layer, and is effective to produce an organic electroluminescent device having low driving voltage, excellent current and power efficiencies, and significantly improved operative lifespan.

In order to provide a novel π-conjugated compound capable of increasing the light-emission efficiency of an organic electroluminescence element, for example, this π-conjugated compound has a structure indicated by general formula (1). ##STR00001## (In general formula (1): Z.sup.1-Z.sup.6 each independently indicate a hydrogen atom, a deuterium atom, an electron-donating group D, or an electron-withdrawing group A; at least out of two among Z.sup.1-Z.sup.6 is an electron-donating group D and the other is an electron-withdrawing group A; and at least one ortho position combination Z.sup.1 and Z.sup.2, Z.sup.2 and Z.sup.3, Z.sup.3 and Z.sup.4, Z.sup.4 and Z.sup.5, Z.sup.5 and Z.sup.6, or Z.sup.6 and Z.sup.1 among Z.sup.1-Z.sup.6 is one combination out of an electron-donating group D and an electron-donating group D, an electron-withdrawing group A and an electron-withdrawing group A, or an electron-donating group D and an electron-withdrawing group A.)

A composition which is useful for producing a light emitting device having excellent light emission efficiency and a light emitting device containing the composition are described. The light emitting device contains an anode, a cathode, and an organic layer disposed between the anode and the cathode and contains a composition containing a metal complex represented by the formula (2), and a compound (B) having a condensed hetero ring skeleton (b) containing a boron atom and at least one selected from the group consisting of an oxygen atom, a sulfur atom, a selenium atom, an sp.sup.3 carbon atom and a nitrogen atom in the ring.

##STR00001##

The present invention relates to phosphorous host materials and an organic electroluminescent device comprising the same. By using the phosphorous host material of the present invention, an organic electroluminescent device having significantly improved operational lifespan can be produced.

The present disclosure relates to an organic electroluminescent compound, and an organic electroluminescent device comprising the same. It is possible to provide an organic electroluminescent device which can be deposited at a low deposition temperature and/or in which clogging is reduced.

SUMMARY

The invention relates to a light emitting organic molecule, in particular for the application in optoelectronic devices. According to the invention, the organic molecule has one first chemical moiety with a structure of Formula I,

##STR00001## and two second chemical moieties with a structure of Formula II,

##STR00002## wherein # represents the binding site of a single bond linking the first chemical moiety to the second chemical moiety; exactly one substituent selected from the group consisting of W, X, and Y is cyanophenyl; exactly one substituent selected from the group consisting of T, V and W represents the binding site of a single bond linking the first chemical moiety and one of the two second chemical moieties; exactly one substituent selected from the group consisting of W′, X′, and Y′ is cyanophenyl; exactly one substituent selected from the group consisting of T′, V′ and W′ represents the binding site of a single bond linking the first chemical moiety and one of the two second chemical moieties; and exactly one substituent selected from the group consisting of R.sup.11, R.sup.12, R.sup.13, R.sup.14, and R.sup.15 is cyanophenyl.

Ligands with fused spirocyclic substitutions and metal complexes formed with such ligands and having improved performance in OLED applications are disclosed.

A condensed cyclic compound represented by Formula 1: ##STR00001## wherein, in Formula 1, A.sub.1, D.sub.1, and R.sub.11 to R.sub.14 are the same as described in the specification.

An organic electroluminescent element including a luminescent compound represented by the following formula (in which R.sup.1 to R.sup.14 each independently represent a hydrogen atom, a deuterium atom, an alkyl group, an aryl group, a heteroaryl group, a fluorine atom, a cyano group, an amino group, an alkoxy group, an aryloxy group, a thio group, or a silyl group, and 8 to 13 groups out of R.sup.1 to R.sup.14 each represent a hydrogen atom or a deuterium atom) in a light emitting layer has high durability and excellent chromaticity. ##STR00001##