Abstract: A light-emitting composition comprising a mixture of a fluorescent light-emitting material a triplet-accepting copolymer comprising a triplet-accepting repeat unit and a repeat unit of formula (I): wherein A is a divalent group; R1 independently in each occurrence is a substituent; R2 in each occurrence is H or a substituent; and x independently in each occurrence is 0, 1, 2 or 3.

Abstract: An unsubstituted or substituted phosphorescent compound of formula (I): Wherein: M is a transition metal; L in each occurrence is independently a mono- or poly-dentate ligand; R8 is H or a substituent; R9 and R10 are each independently selected from the group consisting of branched, linear or cyclic C1-20 alkyl wherein non-adjacent C atoms of the C1-20 alkyl may be replaced with —O—, —S—, —NR12—, —SiR122— or —COO— and one or more H atoms may be replaced with F or —NR122, wherein R12 is H or a substituent; R11 in each occurrence is independently H or a substituent, wherein two groups R11 may be linked to form a ring; x is at least 1; y is 0 or a positive integer; and z1, z2 and z3 are each independently 0 or a positive integer.

Abstract: A polymer comprising repeat units of formula (I) and one or more co-repeat units: Ar1 in each occurrence independently represent an aryl or heteroaryl group; R1 and R2 in each occurrence independently represent a substituent; p independently in each occurrence is 0 or a positive integer; Sp represents a spacer group comprising at least one carbon or silicon atom spacing the two groups Ar1 apart; and each group Ar1 is bound to an aromatic group of a co-repeat unit. The polymer may form a charge-transporting layer of an OLED or may be a host material used with a luminescent dopant in a light-emitting layer of an OLED.

Abstract: A process for the preparation of a polymerizable unit for production of a hole transporting polymer for use in an optical device, which process comprises reacting in the presence of S to form wherein each R is the same or different and is independently H or a substituent group; n is O or an integer from 1 to 100; Ar and Ar? are the same or different and are each aromatic or heteroaromatic groups which are substituted or unsubstituted; Y is a direct bond, a light emissive moiety, a hole transporting moiety or an electron transporting moiety; and X is a polymerizable group.

Abstract: Nozzle plate for a drop on demand printer having a coating formed of fused particles of fluorinated ethylene propylene copolymer. The coating, which offers a low surface energy and good resistance to wear is formed on a laser ablatable material and has an average thickness of at least 200 nm but not greater than 600 nm.

Abstract: A method for forming a display device, comprising: depositing a thin-film transistor switch circuit on a substrate; depositing by ink-jet printing an electrode layer of light transmissive conductive organic material in electrical contact with the output of the thin-film transistor circuit; and depositing an active region of the device over the electrode layer.

Abstract: A photodetector device includes a semiconductive conjugated polymer, such as PPV, arranged between first and second electrode layers having different work functions, a bias circuitry connected to apply a bias voltage between the first and second electrode layers, and a sensing circuitry connected to detect a photocurrent flowing between the first and second electrode layers across the polymer layer as a result of radiation incident on the polymer layer while the bias voltage is applied. The bias voltage is selected in relation to the thickness of the polymer layer.