A thermally activated, sensitized phosphorescence organic electroluminescence device includes a luminescent layer formed of a host material consisting of two materials, one being a hole transport material, and the other an electron transport material, at least one which is a thermally activated delayed fluorescence material. The host material is doped by a phosphorescent dye. The triplet state energy level of the CT excited state of the fluorescence material is higher than the triplet state energy level of the n-π excited state by 0 to 0.3 or the triplet state energy level of the CT excited state of the fluorescence material is higher than the triplet state energy level of the n-π excited state, wherein the difference is above 1.0 eV, and, a difference between the second triplet state energy level of its n-π excited state and the first singlet state energy level of its CT excited state is −0.1 to 0.1 eV.

The present disclosure relates to an organic light-emitting diode having a low driving voltage and long lifespan and more particularly, to an organic light-emitting diode, comprising a first electrode, a second electrode facing the first electrode, and a light-emitting layer interposed therebetween, wherein the light-emitting layer contains at least one of the amine compounds represented by the following Chemical Formula A or Chemical Formula B, plus the compound represented by Chemical Formula D. The structures of Chemical Formulas A, B, and D are the same as in the specification.

Organic compounds containing indolocarbazoles as electron donor connected with electron acceptors such aza-triphenylene or dibenzoquinoxaline that can improve the performance of phosphorescent organic light emitting devices are disclosed.

A compound having the formula Ir(L.sub.A).sub.n(L.sub.B).sub.3-n, having the structure ##STR00001##
of Formula I is provided. In the structure of Formula I, each of A.sup.1 through A.sup.8 is independently carbon or nitrogen; at least one of A.sup.1 through A.sup.8 is nitrogen; ring B is bonded to ring A through a C—C bond; the iridium is bonded to ring A through an Ir—C bond; X is O, S, or Se; each of R.sup.1 through R.sup.5 are independently selected from a variety of substituents, which may be linked for form a ring; n is an integer from 1 to 3; and at least one R.sup.2 adjacent to ring C is not hydrogen. Formulations and devices, such as OLEDs, that include the first compound are also provided.

A fluorescent composition for the securement of a product, and the method for the securement of a product, which includes the step of preparing the fluorescent composition and a securement step by applying the fluorescent composition to at least a portion of the product. The fluorescent composition includes a polymer matrix incorporating at least a compound having formula I:

##STR00001##

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.

Provided is a method for sensing methyl salicylate, which is a plant hormone released when a plant is infected with a disease in cultivation of plants including agricultural crops, and thereby provided a method for early in-situ detection of disease infection in a plant. With the present embodiment, disease infection in a plant can be detected at an early stage by utilizing a rare earth compound that selectively recognizes and forms a complex with methyl salicylate, which is a plant hormone released when a plant is infected by a pathogen, as a receptor for sensing, and by utilizing a fluorescence emission phenomenon and a change in electrochemical behavior after the reaction with methyl salicylate.

The present invention relates to a compound of formula (I) for use in organic electronic devices, a composition comprising a compound of formula (IV) and at least one compound of formula (IVa) to (IVd), an organic semiconductor layer comprising the compound or composition, an organic electronic device comprising the organic semiconductor layer, and a display device comprising the organic electronic device.

##STR00001##

The present application relates to an aptamer nucleic acid molecule, a complex containing the aptamer nucleic acid molecules, a method of detecting intracellular or extracellular RNA, DNA or other target molecules, and a kit containing the aptamer. The aptamer of the present application is capable of specifically binding a kind of fluorophore micromolecules, and can significantly enhance fluorescence intensity under excitation light of appropriate wavelength.

A composition for manufacturing an organic electronic device includes at least three organic functional materials H1, H2, and H3, and at least one organic solvent. The organic functional materials H1 and H2 can form a type II semiconductor heterojunction structure. A LUMO value of the organic functional material H3 is greater than or equal to that of the organic functional materials H1 and H2, and a HOMO value thereof is less than or equal to that of the organic functional materials H1 and H2.