The present invention relates to organic copolymers and organic semiconducting compositions comprising these materials, including layers and devices comprising such organic semiconductor compositions. The invention is also concerned with methods of preparing such organic semiconductor compositions and layers and uses thereof. The invention has application in the field of printed electronics and is particularly useful as the semiconducting material for use in formulations for organic thin film-transistor (OFET) backplanes for displays, integrated circuits, organic light emitting diodes (OLEDs), photodetectors, organic photovoltaic (OPV) cells, sensors, memory elements and logic circuits.

A semiconducting composition comprising a semiconducting polymer and a semiconducting non-polymeric polycyclic compound, wherein the semiconducting polymer comprises units of A and/or B: ##STR00001##
wherein R.sub.1, R.sub.2, R.sub.5, R.sub.6, R.sub.7, R.sub.8, x, y, p, q, r, R.sub.3, R.sub.4, R.sub.9, R.sub.10 and R.sub.11 have any of the meanings defined in the description.

A polymer compound is provided having a constitutional unit represented by the following formula (1): ##STR00001##
wherein: R.sup.1 and R.sup.2 represent an alkyl group, an aryl group, a mono-valent aromatic heterocyclic group, an alkoxy group or an aryloxy group, and Ar.sup.1 represents an arylene group or a di-valent condensed polycyclic aromatic heterocyclic group.

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.

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##

The invention provides compositions comprising crosslinkable BCB-functionalized materials for use in OLEDs applications. The inventive compositions can be used to form hole-transporting materials for use in electroluminescent devices. In particular, the invention provides a composition comprising at least one compound selected from Structure A, as described herein.

##STR00001##

An object of the invention is to provide an organic semiconductor element having high mobility and excellent temporal stability under high humidity, and a manufacturing method thereof. Another object is to provide a novel compound suitable for an organic semiconductor. Still another object is to provide an organic semiconductor film having high mobility and excellent temporal stability under high humidity and a composition for forming an organic semiconductor film that can suitably form the organic semiconductor film.

The organic semiconductor element according to the invention includes an organic semiconductor layer containing an organic semiconductor having a repeating unit represented by Formula 1.

##STR00001##

In one embodiment, a polymer includes a repeating unit represented by a formula (1) shown below. A weight-average molecular weight of the polymer is in a range of 3000 or more to 1000000 or less. ##STR00001##
R1 indicates a monovalent group selected from hydrogen, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aromatic group, and a substituted or unsubstituted hetero-aromatic group. R2, R3, and R4 indicate independently a monovalent group selected from hydrogen, halogen, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aromatic group, and a substituted or unsubstituted hetero-aromatic group. X, Y, and Z indicate independently an atom selected from O, S, and Se.

Yellow electrochromic polymers (ECPs) are prepared that display a yellow neutral state and a highly transmissive oxidized state. The ECPs are copolymers where a dyad of dioxyhetereocyclic repeating unis alternate with a monad of an aromatic repeating unit. An alternate yellow ECP has an oxidation potential of 450 mV or less and is an alternating copolymer of an acyclic dioxythiophene (AcDOT) or a propylene dioxythiophene (ProDOT) with an aromatic repeating unit that has an electron donating substituent. The yellow ECPs can be processed from solution for electrochromic devices.

A polymer, an organic layer composition, an organic layer, and a method of forming patterns, the polymer including a moiety represented by the following Chemical Formula 1: ##STR00001##