The invention relates to a novel composition comprising n-type organic semiconducting (OSC) polymers and p-type OSCs, to its use 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 photo-detectors (OPD), organic field effect transistors (OFET) and organic light emitting diodes (OLED), and to OE, OPV, PSC, OPD, OFET and OLED devices comprising the compositions.

The invention relates to heterocyclic compounds which are suitable for use in electronic devices, and to electronic devices, in particular organic electroluminescent devices, containing said compounds.

A perovskite film, method of preparing thereof, and an optoelectronic device are provided. They are prepared by steps including preparing a mixture containing a first monomer and a second monomer which can be crosslinked in situ; performing an annealing process, and the first monomer and the second monomer are reacted in situ to form a first polymer which combines with the perovskite crystal grains formed by the perovskite precursor and is concentrated at a crystal grain boundary of the perovskite crystal grains to passivate the perovskite crystal grain defects, and then a perovskite film is formed by curing.

Provided is an ink composition capable of improving external quantum efficiency of a photoelectric conversion element. A method for producing an ink composition containing a p-type semiconductor material, an n-type semiconductor material, and a solvent, the method comprising: a step of preparing one or more compositions in which one or both of the p-type semiconductor material and the n-type semiconductor material are dissolved in the solvent; and a step of storing the composition for 4 days or longer to prepare the ink composition. The p-type semiconductor material contains a polymer compound having a donor-acceptor structure.

The present disclosure provides a polymer compound and an organic light emitting device including e same, wherein the polymer comprising a repeating unit represented by the following Chemical Formula 1:

##STR00001##

wherein L, R.sub.1 to R.sub.5, and * are described herein.

Disclosed herein are light emitting device that emit highly circularly polarized light. These devices may be used to form a dot-matrix display or an electronic information display comprised of a series of photopolymerizable, chiral liquid crystalline layers that can be solvent cast on a substrate. The mixture of chiral materials in each successive layer may be blended in such a way that each layer has the same chiral pitch and may also be blended so that the ordinary and extraordinary refractive indices in each layer match the other layers such that the complete assembly of layers will optically function as a single relatively thick layer or chiral liquid crystal. The chiral nematic material in each layer can spontaneously adopt a helical structure with a helical pitch. Further disclosed are pixel structures that not only emit light with brightness and chromaticity information, but also depth of focus information as well.

Provided is a photodetector having a small dark current ratio. A photodetector includes a first electrode, a second electrode, and an active layer provided between the first electrode and the second electrode, the active layer contains a p-type semiconductor material and an n-type semiconductor material, the p-type semiconductor material contains a polymer having the highest occupied molecular orbital (HOMO) of −5.45 eV or less, and the n-type semiconductor material contains a non-fullerene compound. It is preferable that the polymer contained in the p-type semiconductor material contains a constitutional unit DU having an electron donating property and a constitutional unit AU having an electron accepting property, and the non-fullerene compound contains a moiety DP having an electron donating property and a moiety AP having an electron accepting property.

The present disclosure provides a novel material for an organic light emitting device, and an organic light emitting device using same, the novel material being usable both in an organic light emitting device and in a solution process. The present disclosure also provides an organic light emitting device comprising a polymer containing a repeating unit represented by the following Chemical Formula 1, and an ionic compound containing an anionic group represented by the following Chemical Formula 2 in a hole transporting layer:

##STR00001##

wherein all the variables are described herein.

A polymer compound has a repeating unit represented by general formula (1): ##STR00001##
wherein R.sup.1a represents an alkyl group, an aryl group, a monovalent aromatic heterocyclic group or an aralkyl group, each possibly substituted and the same or different; and X.sup.1a represents a group selected from formulae (1a) to (1c).] ##STR00002##
wherein R.sup.1c represents an aryl group or a monovalent aromatic heterocyclic group, possibly substituted; and R.sup.1d to R.sup.1f represent each independently an alkyl group, an aryl group, a monovalent aromatic heterocyclic group, an alkoxy group, an aryloxy group, an aralkyl group, an arylalkoxy group, a substituted amino group, a substituted carbonyl group, a substituted carboxyl group, a fluorine atom or a cyano group; and the pairs R.sup.1d and R.sup.1e, R.sup.1f and R.sup.1g, R.sup.1d and R.sup.1f, and R.sup.1e and R.sup.1g may be mutually linked to form a ring together with a carbon atom to which they are linked.

The present specification relates to an organic solar cell including a first electrode; a second electrode; and one or more organic material layers including a photoactive layer, wherein the photoactive layer includes an electron donor and an electron acceptor, the electron donor includes a polymer including a first unit represented by Chemical Formula 1; a second unit represented by Chemical Formula 2; and a third unit represented by Chemical Formula 3, and the electron acceptor includes a non-fullerene-based compound.