The present invention discloses an novel organic material is represented by the following formula (A) and organic EL device using the organic material as hole blocking layer (HBL), electron transport layer (ETL) or phosphorescent host can efficiently lower driving voltage, lower power consumption and increase the efficiency. ##STR00001##
The same definition as described in the present invention.

The present invention generally discloses an organic optoelectronic material and organic electroluminescent (herein referred to as organic EL) device, organic photovoltaics (herein referred to as OPV) device and organic thin-film transistor (herein referred to as OTFT) device using the organic optoelectronic material. More specifically, the present invention relates to the organic optoelectronic material formula (1), and an organic EL device, OPV device and OTFT device employing the organic optoelectronic material can improve performance.

Provided are a novel aromatic amine derivative having a specific structure and an organic electroluminescence device in which an organic thin layer comprising a single layer or plural layers including a light emitting layer is interposed between a cathode and an anode, wherein at leas one layer of the above organic thin layer contains the aromatic amine derivative described above in the form of a single component or a mixed component. Thus, the organic electroluminescence device is less liable to be crystallized in molecules, improved in a yield in producing the organic electroluminescence device and extended in a lifetime.

The present disclosure relates to an organic electroluminescent compound, and an organic electroluminescent material and an organic electroluminescent device comprising the same. The organic electroluminescent compound of the present disclosure has excellent color purity, solubility, and thermal stability. By comprising the organic electroluminescent compound and the organic electroluminescent material of the present disclosure, an organic electroluminescent device showing low driving voltage, excellent current and power efficiencies, and significantly improved lifespan can be provided.

Provided are a compound of Formula 1 and an organic electric element comprising a first electrode, a second electrode, and an organic material layer formed between the first electrode and the second electrode, and electronic device comprising the organic electric element, wherein the driving voltage of the organic electronic device can be lowered, and the luminous efficiency and life span can be improved by comprising the compound represented by Formula 1 in the organic material layer.

An organic electroluminescent element includes a hole injection layer (HI), a first hole transport layer (HT1), a second hole transport layer (HT2), and a light-emitting layer containing a host compound (H) and a phosphorescence emitting dopant compound (D), which are laminated in this order, between and an anode and a cathode. The phosphorescence emitting dopant compound has a partial structure represented by Formula (1): ##STR00001## The “highest occupied molecular orbital” HOMO of the second hole transport layer satisfies the expression: −5.4<HOMO (HT2)<−4.8; and the relationship of triplet excitation energies (T1) between the phosphorescence emitting dopant compound and a hole transport material contained in the second hole transport layer satisfies the expression: T1 (HT2)−T1 (D)>0.1.

Compound containing a pentalene unit having general formula (I) wherein R.sub.1 and R.sub.2, equal to or different from each other, are selected from: linear or branched C.sub.1-C.sub.20, preferably C.sub.2-C.sub.12, alkyl groups, saturated or unsaturated, optionally containing heteroatoms, cycloalkyl groups optionally substituted, linear or branched C.sub.1-C.sub.20, preferably C.sub.2-C.sub.12, alkoxyl groups, saturated or unsaturated, optionally substituted; or the groups R.sub.1 and R.sub.2 can be optionally bound to each other so as to form, together with the carbon atoms to which they are bound, a cycle or a polycyclic system containing from 3 to 14 carbon atoms, preferably from 4 to 6 carbon atoms, saturated, unsaturated, or aromatic, optionally containing one or more heteroatoms such as, for example, oxygen, sulfur, nitrogen, silicon, phosphorous, selenium; R.sub.3 is selected from aryl groups optionally substituted, heteroaryl groups optionally substituted; n is 0 or 1; with the proviso that: when n is 0, X represents a covalent bond and Y represents a sulfur atom (S); when n is 1, X is equal to Y, and represents a CH group, or a nitrogen atom (N). Said compound containing a pentalene unit, as such or after suitable functionalization and polymerization, can be advantageously used in the construction of photovoltaic devices (or solar devices) such as, for example, photovoltaic cells (or solar cells), photovoltaic modules (or solar modules), on both rigid and flexible supports. Said compound containing a pentalene unit can also be advantageously used as a constitutive unit of luminescent solar concentrators (LSCs). Furthermore, said compound containing a pentalene unit can be advantageously used as precursor of monomeric units in the preparation of semiconductor polymers. ##STR00001##

An amine derivative represented by the following General Formula (1) is provided. ##STR00001##
In the above General Formula (1), Ar1, Ar2 and Ar3 are independently a substituted or unsubstituted aryl group or a substituted or unsubstituted heteroaryl group, at least one of Ar1, Ar2 and Ar3 is substituted with a substituted or unsubstituted silyl group, and L is a single bond, a substituted or unsubstituted arylene group, or a substituted or unsubstituted heteroarylene group.

Novel branched oligoarylsilanes of general formula (I) ##STR00001##
A method of preparation of branched oligoarylsilanes is that a compound of general formula (III)
Y-Q.sub.k-SiAr.sub.n—R).sub.3  (III),
where Y stands for a residue of boronic acid or its ester or Br or I, reacts under Suzuki conditions with a reagent of general formula (IV)
A-X.sub.m-A  (IV),
where A stands for: Br or I, provided that Y stands for a residue of boronic acid or its ester; or a residue of boronic acid or its ester, provided that Y stands for Br or I. A technical result is preparation of novel compounds, featured by a high luminescence efficiency, efficient intramolecular energy transfer from some molecular fragments to others, and an increased thermal stability.

The present invention relates to a plurality of host materials and an organic electroluminescent device comprising the same. By comprising a specific combination of a plurality of host compounds, the organic electroluminescent device according to the present invention provides excellent lifespan characteristics while maintaining high luminous efficiency.