Sumitomo Chemical and Cambridge Display Technology | Date: 2017-03-01
Provided is a light emitting device which is excellent in external quantum efficiency. The light emitting device comprises an anode, a cathode, a first light-emitting layer provided between the anode and the cathode, and a second light-emitting layer provided between the anode and the cathode. The first light-emitting layer is a layer obtained by using a polymer compound comprising a constitutional unit having a cross-linkable group and a phosphorescent constitutional unit, and the second light-emitting layer is a layer obtained by using a composition comprising a non-phosphorescent low molecular weight compound having a heterocyclic structure and at least two phosphorescent compounds.
Cambridge Display Technology | Date: 2017-03-15
A compound comprising a structure of formula (II):^(1) to R^(4) independently are selected from optionally substituted straight, branched or cyclic alkyl chains having between 2 and 20 carbon atoms, alkoxy, amino, amido, silyl, alkenyl, aryl and hetero aryl; where X^(1) and X^(2) independently represent S or O; where Ar^(1) and Ar^(2) are heterocyclic aromatic rings respectively comprising one heteroatom selected from S and O, and where n is an integer between 1 and 4; and wherein one or both of the terminal aromatic groups of the compound is substituted with one or more polymerisable groups T, and wherein each T is independently selected from halogen, boronic acid, diboronic acid, boronic ester, diboronic acid ester, alkylene and stannyl.
Agency: European Commission | Branch: H2020 | Program: RIA | Phase: NMP-20-2014 | Award Amount: 5.00M | Year: 2015
EXTMOS main objective is to create a materials model and the related user friendly code that will focus on charge transport in doped organic semiconductors. Its aims are (i) to reduce the time to market of (a) multilayer organic light emitting devices, OLEDs, with predictable efficiencies and long lifetimes (b) organic thin film transistors and circuits with fast operation. (ii) to reduce production costs of organic devices by enabling a fully solution processed technology. Development costs and times will be lowered by identifying dopants that provide good device performance, reducing the number of dopant molecules that need to be synthesized and the materials required for trial devices. (iii) to reduce design costs at circuit level through an integrated model linking molecular design to circuit operation. Screening imposes the following requirements from the model 1. An improved understanding of dopant/host interactions at the molecular level. Doping efficiencies need to be increased to give better conducting materials. For OLEDs, dopants should not absorb visible light that lowers output nor ultraviolet light that can cause degradation. 2. An ability to interpret experimental measurements used to identify the best dopants. 3. The possibility of designing dopants that are cheap and (photo)chemically robust and whose synthesis results in fewer unwanted impurities, and that are less prone to clustering. The EXTMOS model is at the discrete mesoscopic level with embedded microscopic electronic structure and molecular packing calculations. Modules at the continuum and circuit levels are an integral part of the model. It will be validated by measurements on single and multiple layer devices and circuits and exploited by 2 industrial end users and 2 software vendors. US input is provided by an advisory council of 3 groups whose expertise complements that of the partners.
Cambridge Display Technology and CAMBRIDGE ENTERPRISE Ltd | Date: 2016-07-12
A polymer containing an optionally substituted repeat unit of formula (I) wherein each R is the same or different and represents H or an electron withdrawing group, and each R^(1 )is the same or different and represents a substituent.
Cambridge Display Technology and Sumitomo Chemical | Date: 2016-06-14
A compound of formula (I) wherein X is O or S; each A is a LUMO-deepening substituent; R^(5 )and R^(6 )are independently in each occurrence a substituent; x independently in each occurrence is 0, 1, 2, 3 or 4; y independently in each occurrence is 0, 1 or 2, and each z is independently 0 or 1 with the proviso that at least one z is 1. The compound may be used as a host for a phosphorescent light-emitting material in an organic light-emitting device.
Cambridge Display Technology and Sumitomo Chemical | Date: 2016-03-03
A compound of formula (I) wherein M is a transition metal; L is a ligand; x is at least 1; y is 0 or a positive integer; R^(1 )in each occurrence is independently a substituent; R^(2 )and R^(3 )in each occurrence is independently H or a substituent, with the proviso that at least one of R^(1), R^(2 )and R^(3 )is a group X comprising at least one aryl or heteroaryl group. The compound of formula (I) may be used as a phosphorescent material in an organic light-emitting device.
Cambridge Display Technology and Sumitomo Chemical | Date: 2016-02-17
A polymer comprising a fluorescent light-emitting repeating unit comprising a group of formula ED-EA wherein ED is an electron-donating unit; EA is an electron-accepting unit; and a band gap Eg_(CT )of a charge-transfer state formed from the electron-donating unit and the electron-accepting unit is smaller than the bandgap of either the electron-accepting unit Eg_(EA )or that of the electron-donating unit Eg_(ED).
Cambridge Display Technology | Date: 2016-01-12
A method of forming a light-emitting device comprises: forming patterned portions of precursor material over a substrate, the edges of the patterned portions defining sidewalls; performing a shaping control process on the patterned portions of precursor material to control the sidewall profile to reduce the angle the sidewalls of the precursor material make with the substrate to less than 15 degrees; selectively applying from solution a conductive coating onto the portions of shaped precursor material so as to form a plurality of first conducting contacts such that an upper surface of said conductive coating follows the sidewall profile of the precursor material; forming a light-emitting layer over the conductive contacts and substrate, and forming a plurality of second conducting contacts over the light-emitting layer. The precursor material may comprises an activator catalyst and the conductive coating comprises a metal selectively applied to the shaped precursor material by electroless plating.
Cambridge Display Technology | Date: 2016-06-07
A rectifier diode which does not emit light in operation comprises: Also provided is a method for producing the organic diode.
Cambridge Display Technology and Sumitomo Chemical | Date: 2016-06-14
An organic light-emitting device comprising an anode; a cathode; and a first light- emitting layer between the anode and the cathode, wherein the first light-emitting layer comprises a fluorescent light-emitting material of formula (I): wherein Ar^(1 )independently in each occurrence is a substituted or unsubstituted aryl or heteroaryl group and each R^(1 )is independently H or a substituent; and wherein a first phosphorescent light-emitting material is provided in the first light-emitting layer or in a second light-emitting layer adjacent to the first light-emitting layer.