A process for detecting oil or lubricant contamination in the production of an article by adding a Stokes-shifting taggant to an oil or lubricant of a machine utilized to produce the article or a component thereof, irradiating the articles produced with a first wavelength of radiation, and monitoring the articles for emission of radiation at a second wavelength. The taggant can be in the form of a composition containing a Stokes-shifting taggant, which absorbs radiation at a first wavelength and emits radiation at a second wavelength, different from said first wavelength, dissolved or dispersed in an oil or lubricant.

Disclosed are a compound for an organic optoelectronic device, an organic light emitting diode including the same, and a display device including the organic light emitting diode. The compound for an organic optoelectronic device represented by a combination of the following Chemical Formula 1 and Chemical Formula 2 provides an organic light emitting diode having life-span characteristics due to excellent electrochemical and thermal stability, and high luminous efficiency at a low driving voltage.

The present disclosure provides a composition comprising at least one compound selected from the group consisting of Compound 1, Compound 2, and combinations thereof, as shown below, and described herein: wherein, for Compound 1 and Compound 2, independently, R.sub.1 and R.sub.2 each independently is selected from the group consisting of hydrogen, a substituted alkyl, an unsubstituted alkyl, a substituted heteroalkyl, an unsubstituted heteroalkyl, a substituted aryl, an unsubstituted aryl, a substituted heteroaryl and an unsubstituted heteroaryl; wherein, for Compound 1 and Compound 2, independently, the Component A is selected from the group consisting of Group a) through Group h): wherein Group a) through Group h) are described herein.

The present invention relates to a compound of the formula (I), (II) or (III), to the use of the compound in an electronic device, and to an electronic device comprising a compound of the formula (I), (II) or (III). The present invention furthermore relates to a process for the preparation of a compound of the formula (I), (II) or (III) and to a formulation comprising one or more compounds of the formula (I), (II) or (III).

Branched oligoarylsilanes of general formula (I)

X.sub.mQ.sub.k-SiAr.sub.n—R).sub.3].sub.2  (I).

A method of preparation of branched oligoarylsilanes is that a compound of general formula (III)

Y-Q.sub.k-SiAr.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 compound for organic light-emitting diodes that can operate organic light-emitting diodes at a low driving voltage and an organic light-emitting diode comprising the same and, more particularly, to a compound for use as a fluorescent host in organic light-emitting diodes, which can bring about excellent diode properties by operating organic light-emitting diodes at a low driving voltage, and an organic light-emitting diode comprising the same.

The present invention relates to an organic electroluminescent device containing a mixture which comprises an electron-transporting host material and a hole-transporting host material, to a formulation comprising a mixture of the host materials and to a mixture comprising the host materials. The electron-transporting host material corresponds to a compound of the formula (1) from the class of compounds containing two triazine units. The hole-transporting host material corresponds to a compound of the formula (2) from the class of the biscarbazoles or derivatives thereof.

The present disclosure relates to a boron compound applicable to an organic light-emitting diode and an organic light-emitting diode comprising same. More specifically, the present disclosure relates to a boron compound represented by any one of Chemical Formulas A to D and an organic light-emitting diode comprising same, wherein Chemical Formulas A to D are as defined in the description.

An organic electroluminescence device includes: an anode; an emitting layer; and a cathode, the emitting layer containing a first material, a second material and a third material, the first material being a fluorescent material, the second material being a delayed fluorescent material, the third material having a singlet energy larger than a singlet energy of the second material.

The present invention relates to a compound represented by formula 1, an organic optoelectronic element comprising the same, and a display device comprising the organic optoeletric element. Formula 1 and the description regarding the samen are as defined in the specification.