摘要:
A tandem OLED device including an anode; a cathode; at least two electroluminescent units disposed between the anode and the cathode, wherein each of the electroluminescent units includes at least one hole-transporting layer and one organic light-emitting layer; and an intermediate connector of at least two layers disposed between adjacent electroluminescent units, wherein the intermediate connector includes an organic alkali metal complex layer and an organic electron-accepting layer, the organic electron-accepting layer being disposed closer to the cathode than the organic alkali metal complex layer, and there is present metallic aluminum in the organic alkali metal complex layer.
摘要:
A tandem OLED device including an anode; a cathode; at least two electroluminescent units disposed between the anode and the cathode, wherein each of the electroluminescent units includes at least one hole-transporting layer and one organic light-emitting layer; and an intermediate connector disposed between adjacent electroluminescent units, wherein the intermediate connector includes an n-doped organic layer and an electron-accepting layer, the electron-accepting layer being disposed closer to the cathode than the n-doped organic layer, and wherein the n-doped organic layer includes an alkali metal and an organic alkali metal complex.
摘要:
The invention provides an OLED device comprising a cathode, an anode, and having there between a light-emitting layer, further comprising, between the cathode and the light emitting layer, a non-luminescent electron transporting layer containing a compound with a 7,10-diaryl substituted fluoranthene nucleus having no aromatic rings annulated to the fluoranthene nucleus and an organic alkali metal salt, wherein the % volume of the organic alkali metal salt in the electron-transporting is in the range of greater than 70% but less than or equal to 90%. Devices of the invention provide improvements in T90 and T95 lifetimes.
摘要:
An OLED device including spaced anode and cathodes; at least one light-emitting layer, and a hole-transporting layer disposed between the anode and the light-emitting layer; and a first electron-transporting layer in contact with at least one light-emitting layer and a second electron-transporting layer in contact with the first electron-transporting layer, wherein the first and second electron-transporting layers are disposed between the at least one light-emitting layer and the cathode, wherein: the first electron-transporting layer contains an anthracene compound; and the second electron-transporting layer contains an anthracene compound and at least one salt or complex of an element selected from Group 1, 2, 12 or 13 of the Periodic Table, and is further doped with an alkali metal.
摘要:
Disclosed is a process for preparing a 6-chloro-2,5-dicarbonamido phenol compounds comprising a step employing a 2-alkyl-6-aminobenzoxazole to form a 2-alkyl-6-amino-7-chlorobenzoxazole in which the 2-alkyl group is unbranched at the α carbon. It also provides intermediate compounds useful in the process. The process provides a simple and safe way to prepare 6-chloro-2,5-dicarbonamido phenol compounds in good yield.
摘要:
This invention relates to a photographic element comprising a support having situated thereon at least one silver halide emulsion layer, the element further containing an image modifying coupler which upon reaction with oxidized color developing agent during processing forms a dye, said image modifying coupler represented by the formula ##STR1## wherein COUP is a photographic coupler moiety;T.sup.1 is a timing or linking group;R.sup.1 and R.sup.2 are independently selected from a halide atom, or an aliphatic, carbocyclic, heterocyclic, carbamoyl, sulfamoyl, carbonamido, sulfonamido, acyl, sulfo, nitro, cyano, amino, alkoxy, alkoxyalkyl, aryloxy, aryloxyalkyl, thioalkoxy, thioalkoxyalkyl, thioaryloxy, or thioaryloxyalkyl group; andn is selected from 0, 1 or 2. More particularly this invention relates to a photographic element containing the above image modifying coupler wherein n is 0 and R.sup.1 and R.sup.2 are independently represented by the formula:**--(Z).sub.m -(X).sub.t -R.sup.3** point of attachment to triazole moietywherein;Z is an aliphatic, carbocyclic, or heterocyclic group.
摘要:
Disclosed is a method of preparing a photographic coupler comprised of 1-aryl-3-substituted-4-heterocyclic-5-pyrazolone development inhibitor releasing coupler for use in a photographic element, said coupler capable of reacting with oxidized color developer to release a heterocyclic coupling-off group containing an inhibitor.
摘要:
A new method of preparation of a single isomer of a benzotriazole compound comprises the step of reacting a benzotriazole compound containing symmetrical substituents on the benzo ring with phosgene to produce the corresponding carbamyl chloride. The carbamyl chloride can be reacted with a timeing group of a coupling-off group of a photographic coupler to form a photographic development inhibitor releasing coupler. Such compounds are useful in photographic materials and processes.
摘要:
Photographic compound (A) capable, upon oxidative coupling, of forming a dye, comprises in the coupling position, a coupling-off group that comprises in sequence, a releasable benzotriazole group attached to a triazole, tetrazole, oxadiazole, thiaoxadiazole, or thiadiazole inhibitor group represented by the formula: ##STR1## wherein R.sub.a, R.sub.b, R.sub.c R.sub.1, R.sub.2 and Q are as defined in the application. Such a compound (A) is useful in a photographic silver halide material and process to provide improved images.
摘要:
A method of forming a photographic coupler (A) having the formula:(SOL).sub.x --COUP--(R.sup.1).sub.y --(R.sup.2).sub.z --BLEACHcomprising:(a) providing a coupler (B) having a coupling-off group represented by the formula: ##STR1## (b) reacting said coupling-off group of coupler (B) with phosgene to provide a chloroformate coupling-off group of coupler (B)(c) reacting said chloroformate coupling-off group of coupler (B) in the presence of a strong base selected from the group consisting of triethylamine, N,N-diisopropylethylamine, and tetramethylguanine with:R.sup.14 --R.sup.13 --SH to provide the R.sup.2 group and the BLEACH group of the coupler (A).