Described herein are compositions comprising hole carrier materials, typically conjugated polymers, and poly(aryl ether sulfones)s, ink compositions comprising hole carrier materials and poly(aryl ether sulfones)s, and uses thereof, for example, in organic electronic devices.

Disclosed herein is a composite prepared by dispersing silver flakes in a polyvinyl alcohol (PVA), phosphoric acid (H.sub.3PO.sub.4), and poly(3,4-ethyl-ene-dioxythiophene) (PEDOT):poly(styrene sulfonic acid) (PSS) polymer mixture. The polymer blend can provides conductive pathways between the silver flakes, leading to superior electrical properties even at large deformations.

Water-soluble photoactive polymers, included polymer tandem dyes, as described as well as methods for their preparation and use. The photoactive polymers can be prepared by direct modification of core polymers (e.g., violet excitable polymers) with dyes or other functional groups. Methods of detecting analytes using the polymers are also described.

Provided is a composition for a hole collecting layer of an organic photoelectric conversion element, the composition containing a solvent and an electron transporting substance comprising a polythiophene derivative that includes a repeating unit represented by formula (1) or formula (1′).

##STR00001##

(In formula (1) and formula (1′), R.sup.1 denotes an alkyl group having 1-6 carbon atoms or a fluorine atom. In formula (1), M denotes a hydrogen atom, an alkali metal selected from the group consisting of Li, Na and K, NH(R.sup.2).sub.3 or HNC.sub.5H.sub.5. R.sup.2 groups are each independently a hydrogen atom or an optionally substituted alkyl group having 1-6 carbon atoms.)

Provided is an electrically conductive elastomer with high stretchability and high durability. A method of synthesizing an electrically conductive elastomer includes (a) preparing a eutectic solvent by mixing quaternary ammonium salt and organic acid, and (b) adding and blending the eutectic solvent with poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS), a photocuring agent, and a crosslinker and performing photopolymerization.

The invention discloses a humidity sensor based on squaraine polymer and the preparation method and use thereof. Specifically, the humidity sensor disclosed by the invention comprises a coating material and an interdigital electrode, wherein the coating material is a squaraine polymer as shown in formula I, n is an integer of 40-50, the coating material is brushed on the interdigital electrode, and the thickness is 100-400 microns. The humidity sensor disclosed by the invention has the advantages that the preparation is convenient, and the operation is simple; the response time is short, and the response for humidity change is higher than that of common metallic oxides; the recovery time is short, and the device performance is stable; the humidity hysteresis of the device is high under high humidity environment.

The invention relates to novel conjugated polymers containing one or more diindeno-thieno[3,2-b]thiophene based polycyclic repeating units, to methods for their preparation and educts or intermediates used therein, to polymer blends, mixtures and formulations containing them, to the use of the polymers, polymer blends, 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 polymers, polymer blends, mixtures or formulations.

A method for preparing a magnetic chain structure is provided. The method comprises providing a plurality of magnetic particles; dispersing the plurality of magnetic particles in a solution comprising a dopamine-based material to form a reaction mixture; applying a magnetic field across the reaction mixture to align the magnetic particles in the reaction mixture; and polymerizing the dopamine-based material on the aligned magnetic particles to obtain the magnetic chain structure. A magnetic chain structure prepared by the method is also provided.

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 polymer compound comprising a structural unit represented by the formula (1): ##STR00001##
wherein Ring A and Ring B represent each independently a heterocyclic ring, and the heterocyclic ring may have a substituent, Ring C represents an aromatic hydrocarbon ring obtained by condensing two or more benzene rings, the aromatic hydrocarbon ring has at least one of an alkyl group, an alkoxy group, an alkylthio group, an amino group or a hydroxyl group, and these groups may have a substituent, Z.sup.1 and Z.sup.2 represent each independently a group represented by the formula (Z-1), a group represented by the formula (Z-2), a group represented by the formula (Z-3), a group represented by the formula (Z-4) or a group represented by the formula (Z-5), ##STR00002##
wherein R represents an alkyl group, an alkoxy group, an alkylthio group, an aryl group or a mono-valent heterocyclic group, and these groups may have a substituent, and when there exist a plurality of R, these may be the same or different.