It is an object of the present invention to provide an organometallic complex that can emit phosphorescence. In the following general formula (G1), X represents —O— or —N(R.sup.10)—. R.sup.1 to R.sup.9 each represent any of hydrogen, an alkyl group or a cycloalkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, an alkoxycarbonyl group having 1 to 6 carbon atoms, an acyl group having 1 to 6 carbon atoms, an acyloxy group having 1 to 6 carbon atoms, a halogen group, a haloalkyl group, and an aryl group having 6 to 12 carbon atoms. In addition, R.sup.10 represents any of an alkyl group or a cycloalkyl group having 1 to 6 carbon atoms, an acyl group having 1 to 6 carbon atoms, an aryl group having 6 to 12 carbon atoms, and a heteroaryl group having 4 to 10 carbon atoms. Moreover, M represents an element belonging to Group 9 or 10. ##STR00001##

An organic electroluminescent element using a compound represented by the following general formula (I) emits dark blue light and has small changes in the chromaticity and in the driving voltage even after driving for a long period of time: ##STR00001##
wherein R.sup.1 to R.sup.6; Q.sup.1 and Q.sup.2; X.sup.1, X.sup.2, X.sup.3 and X.sup.4 are as defined herein.

The present invention provides an organic thin film light emitting device having high luminous efficiency and durable life realized by using a benzindolocarbazole derivative as represented by either general formula (1-1) or (1-2) given below: [Chemical compound 1] wherein R.sup.1 to R.sup.24 may be identical to or different from each other and are selected from the group consisting of a hydrogen atom, alkyl group, cycloalkyl group, heterocyclic group, amino group, alkenyl group, cycloalkenyl group, alkynyl group, alkoxy group, alkylthio group, aryl ether group, aryl thioether group, aryl group, heteroaryl group, halogen atom, carbonyl group, carboxyl group, oxycarbonyl group, carbamoyl group, silyl group, and —P(═O)R.sup.25R.sup.26; R.sup.25 and R.sup.26 represent either an aryl group or a heteroaryl group; R.sup.25 and R.sup.26 may be condensed to form a ring; L.sup.1 to L.sup.4 independently represent a single bond, a substituted or unsubstituted arylene group, or a substituted or unsubstituted heteroarylene group; and A.sup.1 to A.sup.4 independently represent an amino group, aryl group, heterocyclic group, or heteroaryl group.

The present invention relates to an at least partly implantable system for injecting a substance into a patient's body. The system comprises at least one implantable infusion needle arranged in at least one first housing, the at least one implantable infusion needle having a tip end for injecting a substance into a penetration area of a patient, and at least one drive unit coupled to the at least one implantable infusion needle and arranged for moving the tip end of the at least one infusion needle for varying the penetration site, wherein the at least one drive unit is a drive unit arranged for moving the tip end of the at least one infusion needle using hydraulic force. The system is adapted to use infusion liquid to be injected into the patient's body as hydraulic fluid.

Provided is a display apparatus. The display apparatus may include an organic light-emitting device (OLED) substrate including a structure in which at least one blue emission unit and at least one green emission unit may be stacked and emitting mixed light of blue light and green light; and a color-controlling unit for controlling color of light generated from the OLED substrate.

Luminescent solar concentrator (LSC) comprising at least one disubstituted benzoheterodiazole compound of general formula (I), in which: Z represents a sulfur atom, an oxygen atom, a selenium atom; or an NR.sub.6 group in which R.sub.6 is selected from linear or branched C.sub.1-C.sub.20, preferably C.sub.1-C.sub.8, alkyl groups, or from optionally substituted aryl groups; R.sub.1, R.sub.2 and R.sub.3, which are the same or different, represent a hydrogen atom; or are selected from linear or branched C.sub.1-C.sub.20, preferably C.sub.1-C.sub.8, alkyl groups, optionally containing heteroatoms, optionally substituted cycloalkyl groups, optionally substituted aryl groups, optionally substituted linear or branched C.sub.1-C.sub.20, preferably C.sub.1-C.sub.8, alkoxyl groups, optionally substituted phenoxyl groups, or —COOR.sub.7 groups or —OCOR.sub.7 groups in which R.sub.7 is selected from linear or branched C.sub.1-C.sub.20, preferably C.sub.1-C.sub.8, alkyl groups, or is a cyano group, provided that when the substituents R.sub.1 represents a hydrogen atom, at least one of the substituents R.sub.2 and R.sub.3 represents an optionally substituted aryl group or an optionally substituted phenoxyl group; or R.sub.1 and R.sub.2, can optionally be linked together so as to form, together with the carbon atoms to which they are linked, a saturated, unsaturated or aromatic cyclic ring or a polycyclic system containing from 3 to 14 carbon atoms, preferably from 4 to 6 carbon atoms, optionally containing one or more heteroatoms such as, for example, oxygen, sulfur, nitrogen, silicon, phosphorus, selenium; or R.sub.2 and R.sub.3 can optionally be linked together so as to form, together with the carbon atoms to which they are linked, a saturated, unsaturated or aromatic cyclic ring or a polycyclic system containing from 3 to 14 carbon atoms, preferably from 4 to 6 carbon atoms, optionally containing one or more heteroatoms such as, for example, oxygen, sulfur, nitrogen, silicon, phosphorus, selenium; R.sub.4 and R.sub.5, which are the same or different, represent a hydrogen atom; or are selected from linear or branched C.sub.1-C.sub.20, preferably C.sub.1-C.sub.8, alkyl groups, optionally containing heteroatoms, optionally substituted cycloalkyl groups, optionally substituted aryl groups, optionally substituted linear or branched C.sub.1-C.sub.20, preferably C.sub.1-C.sub.8, alkoxyl groups, —COOR.sub.7 groups or —OCOR.sub.7 groups in which R.sub.7 is selected from linear or branched C.sub.1-C.sub.20, preferably C.sub.1-C.sub.8, alkyl groups, or is a cyano group; or R.sub.4 and R.sub.5, can optionally be linked together so as to form, together with the carbon ato

Thermally activated delayed fluorescent compounds and uses thereof are described. The thermally activated delayed fluorescent compounds are an analogues of 9,10-dihydro-9,9-dimethylacridine compounds.

Described herein are molecules for use in organic light emitting diodes. Example molecules comprise at least one acceptor moiety A, at least one donor moiety D, and optionally one or more bridge moieties B. Each moiety A is covalently attached to either the moiety B or the moiety D, each moiety D is covalently attached to either the moiety B or the moiety A, and each moiety B is covalently attached to at least one moiety A and at least one moiety D. Values and preferred values of moieties A, D, and B are defined herein.

A condensed cyclic compound represented by Formula 1:

Ar.sub.1-(L.sub.1).sub.a1-Ar.sub.2  Formula 1 wherein, in Formula 1, Ar.sub.1, Ar.sub.2, L.sub.1, and a1 are the same as described in the specification.

An electronic apparatus includes a light-emitting device including an organometallic compound represented by Formula 1:

##STR00001## wherein in Formula 1, CY.sub.1 to CY.sub.3 are each independently a C.sub.3-C.sub.60 carbocyclic group or a C.sub.1-C.sub.60 heterocyclic group, Y.sub.1 to Y.sub.4 are each independently C or N, and A.sub.1 to A.sub.4 are each independently a chemical bond, O, or S.