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Cambridge Display Technology

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Godmanchester, United Kingdom
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Patent
Cambridge Display Technology and Sumitomo Chemical | Date: 2017-07-26

A composition comprising a first material substituted with at least one group of formula (I) and a second material substituted with at least one group selected from groups of formulae (IIa) and (IIb): wherein: Sp1 and Sp2 are spacer groups; NB independently in each occurrence is a norbornene group that may be unsubstituted or substituted with one or more substituents; n1 and n2 are 0 or 1; m1 is 1 if n1 is 0 and m1 is at least 1 if n1 is 1; m2 is 1 if n2 is 0 and m2 is at least 1 if n2 is 1;Ar1 represents an aryl or heteroaryl group; R1 independently in each occurrence is H or a substituent; and * represents a point of attachment to the first or second material. The composition may be used to form a layer of an organic electronic device, for example the hole-transporting layer of an organic light-emitting device.


Patent
Sumitomo Chemical and Cambridge Display Technology | Date: 2017-08-09

There is provided a light-emitting device comprising an anode, a cathode, a first organic layer disposed between the anode and the cathode, and a second organic layer disposed between the anode and the first organic layer and adjacent to the first organic layer, wherein the first organic layer comprises a phosphorescent compound represented by the formula (1), and the second organic layer comprises a crosslinked body formed from a polymer compound having a crosslinkable group, and the average number of the crosslinkable groups per 1000 in molecular weight of the polymer compound is 0.5 or more.


This invention relates to a method for fabrication of electrode material in electronic devices by in situ-electrodeposition of metal or metalloid ions that are present in the device. In another aspect, the present invention relates to electronic devices and charge storage devices comprising the electrodes manufactured by said method. Furthermore, the present invention further relates to a method of enhancing charge injection in an electronic device or charge storage device comprising the steps of: pre-assembling an electronic device or charge storage device and subsequently applying an electric field to effect electrodeposition of an electrode layer in situ by reducing the metal or metalloid ions to a non-ionic state.


Patent
Cambridge Display Technology and Sumitomo Chemical | Date: 2017-07-26

A material substituted with a group of formula (I): wherein: Ar1 is an aryl or heteroaryl group; Sp1 represents a first spacer group; nl is 0 or 1; m1 is 1 if nl is 0 and m1 is at least 1 if nl is 1; R1 independently in each occurrence is H or a substituent, with the proviso that at least one R1 is a group R11 selected from: alkyl comprising a tertiary carbon atom directly bound to a carbon atom of the cyclobutene ring of formula (I); branched alkyl wherein a secondary or tertiary carbon atom of the branched alkyl is spaced from a carbon atom of the cyclobutene ring of formula (I) by at least one -CH2- group; and alkyl comprising a cyclic alkyl group; or with the proviso that at least two R1 groups are linked to form a ring.


Patent
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.


Patent
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.


Patent
Cambridge Display Technology and Sumitomo Chemical | Date: 2017-08-09

An organic light-emitting device (100) comprising an anode (103); a cathode (109); a first light-emitting layer (107) comprising a first light-emitting material between the anode and the cathode; and a hole-transporting layer (105) comprising a hole-transporting polymer between the anode and the first light-emitting layer and adjacent to the first light-emitting layer, wherein a HOMO level of the first light-emitting material is closer to vacuum than a HOMO level of the hole-transporting polymer and wherein more than 50 mol % of the repeat units of the hole-transporting polymer are hole-transporting repeat units.


Patent
Cambridge Display Technology and Sumitomo Chemical | Date: 2017-02-08

Methods of metal-catalysed polymerisation are described using a metal catalyst of formula (III): wherein R^(3 )in each occurrence is independently selected from C_(1-10 )alkyl and aryl that may be unsubstituted or substituted with one or more substituents; y is 0 or 2; and Z^()is an anion. Methods described include Buchwald-type and Suzuki-type polymerisation.


Patent
Cambridge Display Technology and Novaled GmbH | Date: 2017-06-14

An organic light emitting device comprises a light emitting layer comprising a light emitting polymer; and an electron transporting layer on the light emitting layer and comprising an electron transporting material and an n-donor material. The electron transporting layer comprises at least 20 percent by weight of the n-donor material. By using an electron transporting layer comprising at least 20 percent by weight of the n- donor material it is possible to realise devices with an electron transporting layer having a thickness of less than 20nm.


Grant
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.

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