The present application relates to a photoactive composition comprising a blend of polymers. The present application further relates to an organic photovoltaic cell or an organic photodetector comprising a photoactive layer consisting of said photoactive composition.

The present invention discloses an organic polymer having an asymmetric structure, a preparation method thereof and a use as a photoelectric material thereof. The organic polymer with an asymmetric structure is obtained by polymerization after performing Stille coupling reaction between an electron-donating unit D and an electron-withdrawing unit A in the presence of a solvent and a catalyst. The compound of the present application has good heat stability, controllable absorption level, and is suitable for the preparation of hole transport materials of high-performance perovskite solar cells with high efficiency, flexibility, good stability and a large area as well as donor materials of organic solar cells.

A repeat unit comprising

##STR00001##

In the repeat unit, X.sub.1 and X.sub.2 are independently selected from the group consisting of: F, Cl, H, and combinations thereof. Additionally, in this monomer, R′ and R″ are independently selected from an alkyl group, an aryl group, or combinations thereof. Also, R.sub.3, and R.sub.4 are independently selected from unsubstituted or substituted branched alkyls with 1 to 60 carbon atoms and unsubstituted or substituted linear alkyls with 1 to 60 carbon atoms.

A method of combining different materials to produce the polymer

##STR00001##

In this polymer X.sub.1, X.sub.2, X.sub.3, and X.sub.4 are independently selected from the group consisting of: F, Cl, H, and combinations thereof. Additionally, in this polymer R.sub.15, R.sub.16, R.sub.17, and R.sub.18 are independently selected from the group consisting of: F, Cl, H, and combinations thereof. Finally, in this polymer R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7, and R.sub.8 are independently selected from unsubstituted branched alkyls with 1 to 60 carbon atoms unsubstituted or substituted branched alkyls with 1 to 60 carbon atoms and unsubstituted or substituted linear alkyls with 1 to 60 carbon atoms.

A material comprising an electron-accepting unit of formula (I): wherein Ar1 and Ar2 independently is a 5- or 6-membered aromatic or heteroaromatic ring or is absent; and each X is independently H or a substituent with the proviso that at least one X is an electron-withdrawing group and wherein X groups bound to adjacent carbon atoms may be linked to form an electron-withdrawing group. The material further comprises an electron-donating unit D comprising a fused or unfused furan or thiophene. The material may be a polymer comprising repeat units of formula (I). The material may be a non-polymeric compound. An organic photodetector may contain a bulk heterojunction layer containing an electron acceptor or an electron donor wherein at least one of the electron acceptor and electron donor contains a unit of formula (I).

##STR00001##

A polymer comprising

##STR00001##

In this polymer, R, R′, and R″ are independently selected from the group consisting of: H, Cl, F, CN, alkyl, alkoxy, alkylthio, ester, ketone and aryl groups. Additionally, in this polymer X and X′ are independently selected from aryl groups. Finally, m independently ranges from 1 to 100 and n independently ranges from 0 to 99

The invention relates to novel compounds containing one or more units derived from 2,6-disubstituted-[1,5]naphthyridine or 1,6-disubstituted-1H-[1,5]naphthyridine-2-one, to methods for their preparation and educts or intermediates used therein, to mixtures and formulations containing them, to the use of the compounds, mixtures and formulations as organic semiconductors in organic electronic (OE) devices, especially in organic photovoltaic (OPV) devices and organic photodetectors (OPD), and to OE, OPV and OPD devices comprising these compounds, mixtures or formulations.

The invention provides for new polymer compounds and methods for the preparation of modular narrow band gap conjugated compounds and polymers that incorporate exocyclic cross-conjugated donors or substituents, as well as novel monomer components of such polymers and the resulting products which comprise materials and useful electronic devices with novel functionality.

An organic semiconducting compound and an organic photoelectric component containing the same are provided. The organic semiconducting compound has a novel chemical structure to make the organic semiconducting compound have good response to the infrared light. The organic semiconducting compound can be applied to the organic photoelectric components such as organic photodetector (OPD), organic photovoltaic (OPV) cell, and organic field-effect transistor (OFET). Thus, the organic photoelectric components have better light absorption range and photoelectric response while in use.

The present invention belongs to the technical field of organic supermolecules, and specifically discloses a 3,4-ethylenedioxythiophene (EDOT) polymer capable of supramolecular assembly with carbon-based materials, and a preparation method thereof. The polymer of the present invention is a polymer with 3,4-ethylenedioxythiophene-2-acetylene as the main chain and alkoxy as the side chain. The polymer is prepared as follows: subjecting EDOT to bromination, to give 2,5-dibromo-3,4-ethylenedioxythiophene; then reacting 2,5-dibromo-3,4-ethylenedioxythiophene and trimethylsilyl acetylene (TMSA) to give bis(trimethylsilyl)-3,4-ethylenedioxythiophene; removing trimethylsilyl (TMS) protecting groups from the bis(trimethylsilyl)-3,4-ethylenedioxythiophene, and subjecting the obtained compound and 2,5-dibromo-3,4-ethylenedioxythiophene to Sonogashira coupling to give an EDOT polymer. The polymer of the present invention can form a supramolecular assembly system with carbon nanotubes (CNTs), which involves π-π adsorption of the main chain and entanglement of the side chain.