A light-emitting composition comprising: a light-emitting group and a polymer comprising: a repeat unit of formula Ar.sup.1 wherein Ar.sup.1 is an arylene repeat unit which is unsubstituted or substituted with one or more substituents; and a repeat unit of formula (I): (I) wherein Ar.sup.2 and Ar.sup.3 each independently represent a C.sub.6-20 arylene group or a 5-20 membered heteroarylene group which is unsubstituted or substituted with one or more substituents and CB represents a conjugation-breaking group which does not provide a conjugation path between Ar.sup.2 and Ar.sup.3; wherein the polymer has a solubility in water or a C.sub.1-8 alcohol at 20° C. of at least 0.1 mg/ml. The composition may be a light-emitting polymer in which the polymer contains the light-emitting group. The light-emitting composition may be part of a particle containing the polymer and a matrix material, e.g. silica. The light-emitting composition may be used in an assay for detection of a target analyte.

The invention relates to a compound of the general formula I

##STR00001##

to an optoelectronic component containing said type of compound, and to the use of said type of compound in optoelectronic components.

A polymer, a quantum dot composition, and a light-emitting device employing the same are provided. The polymer includes a first repeat unit that has a structure represented by Formula (I):

##STR00001##

wherein the definitions of R.sup.1, R.sup.2, A.sup.1, A.sup.2, A.sup.3, and Z.sup.1 and n are as defined in the specification.

A polymer comprising

##STR00001## wherein m+n=1.

The present disclosure provides a non-fullerene acceptor polymer, which includes a structure represented by formula (I). Formula (I) is defined as in the specification. The non-fullerene acceptor polymer has an electron donating unit and an electron attracting end group. The non-fullerene acceptor polymer uses phenyl or its derivatives as the linker to form the polymer.

A composition for forming organic film, a display device utilizing the composition, and a method of manufacturing the display device are provided. The composition for forming an organic film includes a solvent; and a compound of Formula 1:
ArR).sub.k.  Formula 1

An organic semiconductor device is revealed. The organic semiconductor device includes a first electrode, an electron transport layer, an active layer, a hole transport layer, and a second electrode. The active layer includes an electron donor and at least one electron acceptor. The energy barrier between HOMO level of the electron donor and the energy level of PEDOT:PSS or derivatives in the electron transport layer is less than 0.4 eV. The use of the organic semiconductor device and a formulation of materials for the active layer are also disclosed.

A method of combining different materials to produce the comonomer

##STR00001##

wherein X.sub.1 and X.sub.2 are independently selected from the group consisting of: F, Cl, H, and combinations thereof and wherein R.sub.1 is 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.

The invention relates to novel organic semiconducting compounds containing a polycyclic unit, to methods for their preparation and educts or intermediates used therein, to compositions, polymer blends and formulations containing them, to the use of the compounds, compositions and polymer blends 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, OPV, PSC, OPD, OFET and OLED devices comprising these compounds, compositions or polymer blends.

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.