An organic compound comprising: ##STR00001## In this organic compound, W is selected from the group consisting of: S, Se, O, and N-Q; and Q is selected from the group consisting of: a straight-chain or branched carbyl, silyl, or hydrocarbyl, a branched or cyclic alkyl with 1 to 30 atoms, a fused substituted aromatic ring, and a fused unsubstituted aromatic ring. Additionally, in this organic compound Ar.sub.1 and Ar.sub.2 are independently selected from the group selected from: H, an aryl group, and a heteroaryl group.

Strong and flexible electrically conductive polymers comprising hydrogen-bondable moieties are described herein. The electrically conductive polymers are formed by polymerizing an electron donating aromatic monomer in the presence of an oxidant, solvent, and/or hydrogen-bondable additive, such as an additive comprising a hydroxyl group.

The present invention discloses a terpolymer based on 2,5-bis(2-thienyl)thiazolo[5,4-d]thiazolyl. In the invention, by introducing 2,5-bis(2-thienyl)thiazolo[5,4-d]thiazole units, the conjugated length of the polymers is enlarged and the aggregation in solution becomes weak. The introducing of 2,5-bis(2-thienyl)thiazolo[5,4-d]thiazole unit can easily tune the photophysical properties and the aggregation structure of the terploymers, and the terpolymers show excellent photovoltaic performance. The terpolymers have the following general formula:

##STR00001##

A light emitting device having an anode, a cathode, a first layer disposed between the anode and the cathode, and a second layer disposed between the anode and the first layer is provided. The second layer is a layer containing a crosslinked product of a polymer compound having a crosslinkable group. At least one of the first layer and the second layer contains a compound represented by the formula (T-1):

##STR00001##

The present invention provides: a copolymer (A) which is a copolymer obtained by copolymerizing one or plural cycloolefin monomers and one or plural acyclic olefin monomers, or a copolymer obtained by copolymerizing two or more cycloolefin monomers, wherein the glass transition temperature (Tg) of the copolymer is 100° C. or higher, the refractive index of the copolymer is 1.545 or higher, and the Abbe's number of the copolymer is 50 or larger, and at least one of the cycloolefin monomers is a deltacyclene.

Disclosed is a graft copolymer containing a polyfluorene-based polymer as a main chain and a polyvinylidene fluoride (PVDF) as a side chain, and an element including the same. The graft copolymer contains both the polyfluorene-based polymer and the PVDF, so that the graft copolymer may increase miscibility between polymers to prepare a composite having excellent performance, prepare an uniform thin film through a solution process, and be used as a single material that exhibits both piezoelectric properties and luminescence properties.

A composition which is useful for producing a light emitting device having excellent external quantum efficiency and a light emitting device containing the composition are described. The light emitting device contains an anode, a cathode, and an organic layer disposed between the anode and the cathode and contains a composition containing at least two compounds (A) selected from the group consisting of a compound represented by the formula (FH) and a polymer compound containing a constitutional unit having a group obtained by removing from a compound represented by the formula (FH) one or more hydrogen atoms, and a compound (B) having a condensed hetero ring skeleton (b) containing a boron atom and a nitrogen atom in the ring.

##STR00001##

The invention relates to novel organic semiconducting (OSC) random copolymers containing a halo-substituted 4,8-dithiophenyl-benzodithiophene unit and a benzodithiophene-dione unit, to methods for their preparation and educts or intermediates used therein, to compositions and formulations containing them, to the use of the copolymers and compositions as organic semiconductors in, or for the preparation of, organic electronic (OE) devices, especially organic photovoltaic (OPV) devices, perovskite-based solar cell (PSC) devices, organic photodetectors (OPD), organic field effect transistors (OFET) and organic light emitting diodes (OLED), and to OE devices comprising these copolymers or compositions.

A composition which is useful for producing a light emitting device having excellent light emission efficiency and a light emitting device containing the composition are described. The light emitting device contains an anode, a cathode, and an organic layer disposed between the anode and the cathode and contains a composition containing a metal complex represented by the formula (2), and a compound (B) having a condensed hetero ring skeleton (b) containing a boron atom and at least one selected from the group consisting of an oxygen atom, a sulfur atom, a selenium atom, an sp.sup.3 carbon atom and a nitrogen atom in the ring.

##STR00001##

Disclosed are low-temperature thermally and/or ultraviolet light curable polymers that can be used as active and/or passive organic materials in various electronic, optical, and optoelectronic devices. In some embodiments, the device can include an organic semiconductor layer and a dielectric layer prepared from such low-temperature thermally and/or ultraviolet light curable polymers. In some embodiments, the device can include a passivation layer prepared from the low-temperature thermally and/or ultraviolet light curable polymers described herein. In certain embodiments, a polymer of the disclosure has a repeating unit having the structure (I) in which Q.sup.1-Q.sup.2 and Q.sup.3-Q.sup.4 are each independently —C(H)═C(H)— or (II) in which each n is independently selected from 1, 2, 3 and 4, and the polymer includes at least one repeating unit of Formula (I) wherein Q.sup.1-Q.sup.2 and Q.sup.3-Q.sup.4 is (II).