Hitoshi Y Yamamoto

7431807, Oct 7, 2008

Jan 7, 2005

11/030076

Hitoshi Yamamoto - Pennington NJ, US

Universal Display Corporation - Ewing NJ

C23C 14/12
C23C 16/448

2041921, 20419312, 4272556, 427 8

A method for evaporating a solid organic material by sublimation using an infrared guiding heater which minimizes temperature gradients in the bulk of the organic target. The bulk is heated to a temperature below the sublimation temperature of the target. A localized area of the target is sublimated by the infrared guiding heater while regulating the temperature of the bulk. The vapor is then deposited over, and condensed on, a substrate to form a solid organic layer.

20080166472, Jul 10, 2008

Dec 13, 2007

11/956064

Peter B. MacKenzie - Kingsport TN, US
Hitoshi Yamamoto - Pennington NJ, US
Michaeal S. Weaver - Princeton NJ, US
Vadim I. Adamovich - Yardley PA, US
Raymond Kwong - Westhampton NJ, US

Universal Display Corporation - Ewing NJ

C23C 16/18
C23C 16/448
A61L 9/02
H01L 27/32

427 968, 239 60, 427252, 438 99

Methods for evaporating (e.g., subliming) a material in the solid state. In one aspect, a mass of the material in the solid state is mixed with a plurality of packing units, wherein each of the packing units comprises an inert material. The structure of each of the packing units, or the structure of an aggregate of the packing units, comprises a plurality of non-smooth features. In one example, Pro-Pak™ metal meshes can be used, which have a plurality of various types of non-smooth features, including sharp edges, corners, and/or protrusions. These non-smooth features are believed to physically disrupt crust formation during the evaporation process. Also disclosed are other methods for evaporating a material and methods for fabricating an organic thin-film device.

20120319146, Dec 20, 2012

Jun 17, 2011

13/163207

Vadim Adamovich - Yardley PA, US
Hitoshi Yamamoto - Pennington NJ, US
Michael S. Weaver - Princeton NJ, US

Universal Display Corporation - Ewing NJ

H01L 51/52
H01L 51/56

257 89, 438 46, 257E51022

A first device is provided. The first device includes an anode, a cathode and an emissive layer disposed between the anode and the cathode. The emissive layer includes a first organic emitting material having a first peak wavelength and a second organic emitting material having a second peak wavelength. The emissive layer has a homogenous composition. The second peak wavelength is between 0 and 40 nm greater than the first peak wavelength.

20130105777, May 2, 2013

Oct 31, 2012

13/665538

Universal Display Corporation - Ewing NJ, US
Hitoshi Yamamoto - Pennington NJ, US
Michael S. Weaver - Princeton NJ, US
Julia J. Brown - Yardley PA, US

UNIVERSAL DISPLAY CORPORATION - Ewing NJ

H01L 51/54
H01L 51/56

257 40, 438 29, 257E51019

The invention provides a light emitting device, comprising: a first electrode; a second electrode; a light emitting layer disposed between the first electrode and the second electrode, wherein the light emitting layer comprises an emitting material having a first triplet energy level (T1); and an exciton quenching layer disposed between the light emitting layer and the second electrode, wherein the exciton quenching layer comprises a non-emitting quenching material having a second triplet energy level (T1); wherein the exciton quenching layer is disposed adjacent to the light emitting layer; wherein the emitting material emits by phosphorescence or delayed fluorescence; and wherein the first triplet energy level (T1) is higher than the second triplet energy level (T1). Methods of making the same are also provided.

20130126832, May 23, 2013

Jul 7, 2010

13/642693

Hitoshi Yamamoto - Pennington NJ, US
Michael S. Weaver - Princeton NJ, US
Julia J. Brown - Yardley PA, US
Kazuki Nishimura - Chiba, JP
Toshihiro Iwakuma - Chiba, JP
Chishio Hosokawa - Chiba, JP
Toshinari Ogiwara - Chiba, JP

UNIVERSAL DISPLAY CORPORATION - Ewing NJ
Idemitsu Kosan Co., Ltd. - Tokyo

H01L 51/00

257 40

The present invention provides an OLED in which an organic thin film layer comprising a single layer or plural layers between a cathode and an anode, wherein the organic thin film layer comprises at least one organic light emitting layer, wherein at least one light emitting layer comprises at least one host material and at least one phosphorescent emitter material, wherein the host material comprises a substituted or unsubstituted hydrocarbon compound having the chemical structure represented by the formula (A-I): formula (A-1) wherein Rand Reach represent independently a substituted or unsubstituted alkyl group having from 1 to about 5 carbon atoms; Arrepresents a divalent residue of a benzene ring, a naphthalene ring, a chrysene ring, a phenanthrene ring, a benzophenanthrene ring, a dibenzophenanthrene ring, a benzo[a]triphenylene ring, a benzochrysene ring, a fluoranthene ring, a benzo[b]fluoranthene ring, a chrysene ring, a phenanthrene ring, a benzophenanthrene ring, a dibenzophenanthrene ring, a benzo[a]triphenylene ring, a benzochrysene ring, a fluoranthene ring, a benzo[b]fluoranthene ring or a picene ring; and Arand Areach may have independently one or plural substituent(s) selected from the group consisting of an alkyl group having 1 to about 3 carbon atoms, a cycloalkyl group having about 5 to about 7 ring-forming carbon atoms, a silyl group having about 3 to about 12 carbon atoms, a cyano group, a halogen atom and an aryl group having about 6 to about 16 ring-forming carbon atoms; and the phosphorescent emitter material comprises a phosphorescent organometallic complex having a substituted chemical structure represented by one of the following partial chemical structures represented by the formulae: formulae (I), (II), (III) wherein R is independently hydrogen or an alkyl substituent having 1-3 carbon atoms, and wherein at least one ring of the formula has one or more of said alkyl substituent.

20130306960, Nov 21, 2013

Feb 11, 2011

13/995193

Hitoshi Yamamoto - Pennington NJ, US
Michael S. Weaver - Princeton NJ, US
Julia J. Brown - Yardley PA, US
Kazuki Nishimura - Chiba, JP
Toshihiro Iwakuma - Chiba, JP
Mitsunori Ito - Chiba, JP

Idemitsu Kosan Co., Ltd. - Tokyo
Universal Display Corporation - Ewing NJ

H01L 51/50

257 40

The present invention provides an OLED in which an organic thin film emissive layer comprising a single layer or plural layers between a cathode and an anode, wherein the organic thin film layer comprises at least one organic light emitting layer, wherein at least one light emitting layer comprises at least one host material and at least one phosphorescent emitter material, wherein the host material comprises a substituted or unsubstituted hydrocarbon compound having the chemical structure represented by the following formula (1):

20130306961, Nov 21, 2013

Feb 11, 2011

13/995216

Hitoshi Yamamoto - Pennington NJ, US
Michael S. Weaver - Princeton NJ, US
Julia J. Brown - Yardley PA, US
Kazuki Nishimura - Chiba, JP
Toshihiro Iwakuma - Chiba, JP
Tomoki Kato - Chiba, JP
Mitsunori Ito - Chiba, JP

Idemitsu Kosen Co. Ltd - Tokyo
Universal Display Corporation - Ewing NJ

H01L 51/50

257 40

The present invention provides an OLED in which an organic thin film emissive layer comprising a single layer or plural layers between a cathode and an anode, wherein the organic thin film layer comprises at least one organic light emitting layer, wherein at least one light emitting layer comprises at least one host material and at least one phosphorescent emitter material, wherein the host material comprises a substituted or unsubstituted hydrocarbon compound having the chemical structure represented by the following formula:

20130306962, Nov 21, 2013

Feb 11, 2011

13/995276

Hitoshi Yamamoto - Pennington NJ, US
Michael S. Weaver - Princeton NJ, US
Julia J. Brown - Yardley PA, US
Kazuki Nishimura - Chiba, JP
Toshihiro Iwakuma - Chiba, JP
Kei Yoshida - Chiba, JP

Universal Display Corporation - Ewing NJ

H01L 51/50

257 40

The OLEDs of the present invention are characterized by providing an organic thin film layer comprising a single layer or plural layers between a cathode and an anode, wherein the organic thin film layer comprises at least one organic light emitting layer, wherein at least one light emitting layer comprises at least one host material and at least one phosphorescent emitter material, wherein the host material comprises a substituted or unsubstituted hydrocarbon compound represented by the formula (1) or (2):wherein Cz represents a substituted or unsubstituted arylcarbazolyl group or carbazolylalkylene group, A represents a group represented by the following general formula (3):wherein M and M′ each independently represent a heteroaromatic ring having 2 to 40 carbon atoms and nitrogen atom and forming a substituted or unsubstituted ring, M and M′ may represent a same ring or different rings, L represents a single bond, a substituted or unsubstituted aryl group or arylene group having 6 to 30 carbon atoms, a substituted or unsubstituted cycloalkylene group having 5 to 30 carbon atoms or a substituted or unsubstituted heteroaromatic ring having 2 to 30 carbon atoms, p represents an integer of 0 to 2, q represents an integer of 1 or 2, r represents an integer of 0 to 2, and p+r represents an integer of 1 or greater; and n and m each represent an integer of 1 to 3;wherein M is a metal that forms octahedral complexes,L, L′, L″ are equivalent or inequivalent bidentate ligands wherein each L comprises a substituted or unsubstituted phenylpyridine ligand coordinated to M through an sp2 hybridized carbon and N;