A composition comprising a phosphorescent compound of formula (I) and a polymer comprising a repeat unit of formula (II) Ar.sup.1 is an aryl or heteroaryl group. R.sup.2 is a substituent. A is independently in each occurrence N or CR.sup.3 wherein R.sup.3 is H or a substituent. M is a transition metal or metal ion. x is a positive integer of at least 1. y is 0 or a positive integer. L.sup.1 is a mono- or polydentate ligand. R.sup.1 is a substituent. z is 0 or a positive integer. X is O or S. The phosphorescent compound of formula (I) may be mixed with the polymer or may be covalently bound thereto. The composition may be used in the light-emitting layer of an organic light-emitting device.

An organic light-emitting device (100) comprising an anode (103); a cathode (109); a light-emitting layer (107) between the anode and the cathode; a first hole-transporting layer (105A) comprising a first conjugated hole-transporting polymer between the anode and the light-emitting layer; and a second hole-transporting layer (105B) comprising a second conjugated hole-transporting polymer between the first hole-transporting layer and the light-emitting layer, wherein a lowest excited state energy level of the first hole-transporting polymer is lower than the lowest excited state energy of the second hole-transporting polymer.

The present invention relates to hyperbranched polymers, to a process for the preparation thereof, and to the starting compounds necessary for the preparation. The present invention furthermore relates to the use of the hyperbranched polymers according to the invention in electronic devices and to the electronic devices themselves.

The invention relates to new conjugated semiconducting polymers containing thermally cleavable side groups. The thermally cleavable side groups are selected from among carbonate groups and carbamate groups, By thermally cleaving side groups, the solubility or the polymers can he reduced in a targeted manner. The polymers are used as semiconductors in organic electronic (OE) devices, especially in organic photovoltaic (OPV) devices, organic photodetectors (OPDs), organic light emitling diodes (OLEDs), and organic field effect transistors (OFETs).

A composition suitable for use in an organic light-emitting layer (103) of an organic light-emitting device having an anode (101) and a cathode (105), the composition comprising a fluorescent light-emitting material, a first triplet-accepting material and a second triplet-accepting material that is different from the first triplet-accepting material. The fluorescent light-emitting material may be a repeat unit of a light-emitting polymer, and the first and second triplet-accepting materials may independently be repeat units of the light-emitting polymer or may be mixed with the fluorescent light-emitting material.

A polymer compound having an excellent crosslinking ability is provided. The polymer compound has at least one terminal constitutional unit represented by the formula (1) and a constitutional unit represented by the formula (2):

##STR00001##

In the constitutional unit represented by formula (1), mT represents an integer of 0 to 5, nT represents an integer of 1 to 4, cT represents an integer of 0 to 1, Q.sup.T represents a crosslinkable group, K.sup.T represents an alkylene group or the like and Ar.sup.T represents an aromatic hydrocarbon group or the like. In the constitutional unit represented by formula (2), mA represents an integer of 0 to 5, n represents an integer of 1 to 4, Ar.sup.1 represents an aromatic hydrocarbon group or the like, K.sup.A represents an alkylene group or the like and Q.sup.1 represents a crosslinkable group.

Water-soluble, conjugated polymers containing one or more dibenzosilole monomer residues, as well as compositions, kits, and methods of making and using such polymers are disclosed. Also disclosed are dibenzosilole derivatives substituted with one or more water-solubilizing groups, and methods of making and using such derivatives to prepare water-soluble dibenzosilole polymers.

An object is to provide an organic semiconductor element having excellent carrier mobility and heat resistance of a semiconductor active layer, an organic semiconductor composition for obtaining this element, an organic semiconductor film, and a method of manufacturing an organic semiconductor element in which the composition is used, and another object is to provide a compound and an oligomer or a polymer that are suitably used in the organic semiconductor element, the organic semiconductor composition, the organic semiconductor film, and the method of manufacturing an organic semiconductor element.

The organic semiconductor element of the present invention includes a compound represented by Formula 1 below in a semiconductor active layer. In Formula 1, X represents a chalcogen atom, p and q each independently represent an integer of 0 to 2, and R.sup.1 and R.sup.2 each independently represent a halogen atom or a group represented by Formula W below.

##STR00001##

The present invention relates to polymers comprising one or more (repeating) unit(s) of the formula (I), and compounds of formula (III), wherein Y, Y.sup.15, Y.sup.16 and Y.sup.17 are independently of each other a group of formula and their use as IR absorber, organic semiconductor in organic devices, especially in organic photovoltaics and photodiodes, or in a device containing a diode and/or an organic field effect transistor. The polymers and compounds according to the invention can have excellent solubility in organic solvents and excellent film-forming properties. In addition, high efficiency of energy conversion, excellent field-effect mobility, good on/off current ratios and/or excellent stability can be observed, when the polymers and compounds according to the invention are used in organic field effect transistors, organic photovoltaics and photodiodes. ##STR00001##

A polycyclic aromatic compound represented by Formula (1) is provided by the invention:

##STR00001##

wherein A.sup.11 ring, A.sup.21 ring, A.sup.31 ring, B.sup.11 ring, B.sup.21 ring, C.sup.11 ring, and C.sup.31 ring are an aryl or heteroaryl ring which may be substituted, Y.sup.11, Y.sup.21, Y.sup.31 are B or the like, X.sup.11, X.sup.12, X.sup.21, X.sup.22, X.sup.31, X.sup.32 are >O or >N—R, R in the above >N—R is an and which may be substituted or the like, R in the above >N—R or the like may be bonded to A.sup.11 ring, A.sup.21 ring, A.sup.31 ring, B.sup.11 ring, B.sup.21 ring, C.sup.11 ring, and/or C.sup.31 ring by a linking group or a single bond; and at least one hydrogen in the compound represented by Formula (1) may be replaced with deuterium, cyano, or a halogen.