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.

An aromatic amine derivative represented by formula (1): ##STR00001##
wherein R.sup.1, R.sup.2, R.sup.3, L, Ar.sup.1, Ar.sup.2, k, m, and n are the same as defined in the specification, is useful as a material for an organic EL device and realizes an organic EL device with a high efficiency and a long lifetime even when driving it at a low voltage.

Sealant compositions and methods for their use where the sealant compositions include a curable sealant and a photochromic material that undergoes a feature change upon exposure to radiation.

High performance OLED that includes deuterated compounds in the emissive layer are disclosed. The OLED includes an anode; a cathode; and an emissive layer, disposed between the anode and the cathode. In the OLED, the emissive layer includes a first phosphorescent emitter and a first host; the first phosphorescent emitter is a metal complex; the first host is partially or fully deuterated; and at least one additional condition is true.

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.

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.

The present application belongs to the technical field of organic materials and provides a nitrogen-containing compound, an electronic component, and an electronic device. The nitrogen-containing compound has a structure shown in Chemical formula 1:

##STR00001##

Provided are an organic electroluminescent material and a device thereof. The organic electroluminescent material is a metal complex containing a ligand L.sub.a having a structure of Formula 1. Such new compounds with a fluorine substituent introduced at a particular position of the ligand L.sub.a are applicable to electroluminescent devices and can provide more saturated luminescence and better device performance such as improved device efficiency and reduced device voltage. Further provided are an electroluminescent device containing the metal complex and a compound composition containing the metal complex.

The present disclosure relates to a spiropyran composite having improved mechano-sensitivity, a method for manufacturing the same, and a chromic article including the same. Particularly, the spiropyran composite is obtained by bonding spiropyran covalently to a polymer, an inorganic material or a mixture thereof to form spiropyran composite, and impregnating the spiropyran composite with a sensitivity-enhancing agent for a suitable time through a wet infiltration process to form non-polar environment at the inner part of the spiropyran composite, to cause pre-stretch and to increase a change in color or fluorescence in response to force, stress or strain, thereby providing significantly improved mechano-sensitivity. In addition, a wet filtration process is used and no expensive equipment is required to simplify the process. Further, the process can be performed rapidly within several minutes to reduce the processing time.