The present application relates to a polycyclic compound including nitrogen and an organic light emitting device including the same.

The invention relates to Organic light emitting diode comprising at least one emission layer, an electron injection layer and at least one cathode electrode, wherein: the electron injection layer comprises an organic phosphine compound, wherein the electron injection layer is free of a metal, metal salt, metal complex and metal organic compound; the cathode electrode comprises at least a first cathode electrode layer, wherein the first cathode electrode layer comprises a first zero-valent metal selected from the group comprising alkali metal, alkaline earth metal, rare earth metal and/or a group 3 transition metal; and the electron injection layer is arranged in direct contact to the first cathode electrode layer.

An organic compound is represented by general formula (1) below:

##STR00001## where X.sub.1 and X.sub.2 are each independently selected from the group consisting of an alkyl group, an aryl group, and an aralkyl group; R.sub.11 to R.sub.16 are each independently selected from the group consisting of a hydrogen atom, an alkyl group, an alkoxy group, an aryl group, a heterocyclic group, and a halogen atom; R.sub.21 and R.sub.22 are each independently selected from the group consisting of a hydrogen atom, an alkyl group, an aryl group, and an aralkyl group; and A.sub.1.sup. and A.sub.2.sup. each independently represent a monovalent anion.

The present invention relates to an. organic semiconductive layer which is an electron transport layer and/or an electron injection layer and/or an n-type charge generation layer, the organic semiconductive layer comprising at least one compound of formula (1) wherein R.sup.1 and R.sup.2 are each independently selected from C.sub.1 to C.sub.16 alkyl; Ar.sup.1 is selected from C.sub.6 to C.sub.14 arylene or C.sub.3 to C.sub.12 heteroarylene; Ar.sup.2 is independently selected from C.sub.14 to C.sub.40 arylene or C.sub.8 to C.sub.40 heteroarylene; R.sup.3 is independently selected from H, C.sub.1 to C.sub.12 alkyl or C.sub.10 to C.sub.20 aryl; wherein each of Ar.sup.1, Ar.sup.2 and R.sup.3 may each independently be unsubstituted or substituted with at least one C.sub.1 to C.sub.12 alky group; n is 0 or 1; and m is 1 in case of n=0; and m is 1 or 2 in case of n=1, phosphine oxide compounds comprised therein and to organic electroluminescent devices comprising such layers and compounds.

##STR00001##

The present application relates to a polycyclic compound including nitrogen and an organic light emitting device including the same.

Provided are a condensed cyclic compound and an organic light-emitting device. The condensed cyclic compound is represented by Formula 1: ##STR00001## Details about the constituents of Formula 1 is disclosed.

Universally usable process for reducing the chlorine content of organotetraphosphites.

Compounds useful as fluorescent or colored dyes are disclosed. The compounds have the following structure (I): including stereoisomers, salts and tautomers thereof, wherein R.sup.1, R.sup.2, R.sup.3, L.sup.1, L.sup.2, L.sup.3, L.sup.4, L.sup.5, L.sup.6, M.sup.1, M.sup.2, A, q, w and n are as defined herein. Methods associated with preparation and use of such compounds are also provided.

##STR00001##

Compounds useful as fluorescent or colored dyes are disclosed. The compounds have the following structure (I):

##STR00001##

or a stereoisomer, tautomer or salt thereof, wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, L.sup.1, L.sup.2, L.sup.3, L.sup.4, M, m and n are as defined herein. Methods associated with preparation and use of such compounds are also provided.

A condensed cyclic compound which improves emission life and efficiency and an organic electroluminescence device is provided. The condensed cyclic compound according to the inventive concept is represented by the following

##STR00001##

where each of X, Y and Z is independently a substituted or unsubstituted pentagonal hydrocarbon ring, a substituted or unsubstituted hexagonal hydrocarbon ring, a substituted or unsubstituted pentagonal heterocycle, or a substituted or unsubstituted hexagonal heterocycle, the pentagonal heterocycle and the hexagonal heterocycle each independently includes one heteroatom, each of a and b is independently 0 or 1, and Ar.sub.1 is a substituted or unsubstituted aryl group having 6 to 30 carbon atoms for forming a ring.