Universal Display Corporation

Eric A Margulies

Zhiqiang Ji

Jui-Yi Tsai

Alexey Borisovich Dyatkin

Walter H Yeager

Lichang Zeng

Michael Stuart Weaver

Nicholas John Thompson

Mingjuan Su

Pierre-Luc T Boudreault

Chuanjun Xia

Chun Lin

Bin Ma

Julia J Brown

Michael Stewart Weaver

Jerald Feldman

Alan Deangelis

Michael G Hack

Geza Szigethy

George Fitzgerald

Paul M Lahti

Tongxiang (Aaron) Lu

Mark Edward Thompson

Vadim Adamovich

Bert Alleyne

Hsiao-Fan Chen

Michael Fusella

A compound is disclosed that has a metal coordination complex structure having at least two ligands coordinated to the metal; wherein the compound has a first substituent Rat one of the ligands' periphery; wherein a first distance is defined as the distance between the metal and one of the atoms in Rwhere that atom is the farthest away from the metal among the atoms in R; wherein the first distance is also longer than any other atom-to-metal distance between the metal and any other atoms in the compound; and wherein when a sphere having a radius r is defined whose center is at the metal and the radius r is the smallest radius that will allow the sphere to enclose all atoms in the compound that are not part of R, the first distance is longer than the radius r by at least 2.9 Å.

Organic electroluminescent materials and devices

An OLED including an anode, a cathode, and an organic layer between the anode and the cathode, where the organic layer includes a compound having the formula [L]Ir[L]is disclosed. In the formula, Lis

Provided is an OLED structure includes an organic layer having a primary phosphorescent emitter and a first host; where one of the following conditions is true: (1) the organic layer further includes a secondary emitter; or (2) the OLED further includes a second organic layer where the second organic layer includes a secondary emitter. The primary phosphorescent emitter has a peak emission wavelength λmax that is ≥600 nm and ≤750 nm; the secondary emitter has a peak emission wavelength λmax that is ≥750 nm; the primary phosphorescent emitter is capable of transferring energy to the secondary emitter; the first host has a lowest excited state triplet energy T1 that is at least 0.1 eV higher than that of the primary phosphorescent emitter; the primary phosphorescent emitter has the formula Pt(L); Lcan represent one or more ligands that are the same or different; each Lis independently monodentate or multidentate; and m represents a maximum possible number of ligands Lthat can coordinate to Pt.

Organic electroluminescent devices

A compound having a metal coordination complex structure, where the compound is capable of functioning as a phosphorescent emitter in an organic light emitting device at room temperature is disclosed. The compound has a first ligand coordinated to a metal. The free-state of the first ligand has a first triplet energy T1 of Eat 77K, while the compound has a first triplet energy T1 of E at 77K, and the difference in energy (ΔE) between E and Eis ≤250 meV. The compound has a triplet emission spectrum with a FWHM value of no more than 45 nm. Organic light emitting devices, consumer products, and formulations containing the compounds are also disclosed.

Compounds that are organic radicals that can have a dual function. The compounds can be fluorescent emitters that emit in the near-IR. The compounds can also facilitate reverse intersystem crossing (RISC) to convert triplet excitons in an OLED to singlet excited states to maximize utilization of generated excitons in the OLED and approach 100% internal quantum efficiency.

Embodiments of the disclosed subject matter provide a device having a substrate, at least one organic light-emitting layer disposed over the substrate, and at least one down-conversion layer. The at least one down-conversion layer may generate the NIR emission by absorbing at least a portion of the light emitted by the at least one organic light emitting layer, and re-emitting light at a longer NIR wavelength or range of wavelengths having a peak NIR emission that may be greater than 700 nm, greater than 750 nm, or greater than 800 nm. An out-of-plane optical density of the at least one down-conversion layer may be less than 0.1 for all wavelengths of light in a range from 400 nm to 600 nm.

Organic electroluminescent devices containing a near-infrared down-conversion layer

An OLED structure including a first organic layer disposed between the anode and the cathode is disclosed. The first organic layer includes a primary phosphorescent emitter and a first host, and where one of the following conditions is true: (1) the first organic layer further includes a secondary emitter; or (2) the OLED further includes a second organic layer disposed between the anode and the cathode, wherein the second organic layer includes a secondary emitter. The phosphorescent emitter has a peak emission wavelength λmax that is ≥600 nm and ≤750 nm, the secondary emitter has a peak emission wavelength λmax that is ≥750 nm, and the first host has a lowest excited state triplet energy T1 that is at least 0.1 eV higher than that of the primary phosphorescent emitter.

A compound is disclosed that has a metal coordination complex structure having at least two ligands coordinated to the metal; wherein the compound has a first substituent Rat one of the ligands' periphery; wherein a first distance is defined as the distance between the metal and one of the atoms in Rwhere that atom is the farthest away from the metal among the atoms in R; wherein the first distance is also longer than any other atom-to-metal distance between the metal and any other atoms in the compound; and wherein when a sphere having a radius r is defined whose center is at the metal and the radius r is the smallest radius that will allow the sphere to enclose all atoms in the compound that are not part of R, the first distance is longer than the radius r by at least 2.9 &#x212b;.

A compound is disclosed that includes a ligand Lof Formula I where ring C is a 5-membered or a 6-membered carbocyclic or heterocyclic ring; each R, R, and Rindependently represents mono to the maximum allowable number of substitutions, or no substitution; Lis complexed to a metal M; M is optionally coordinated to other ligands; the ligand Lis optionally linked with other ligands to comprise a tridentate, tetradentate, pentadentate, or hexadentate ligand; and any two substituents of Rand Rmay be joined or fused together to form a ring.

A compound having the formula Ir(L)(L), having the structure Formula I, is disclosed. In Formula I, each of Z, Z, Z, and Zis CR; X is O, S, or Se; n is an integer from 1 to 3; R, R, R, R, and Reach independently represent mono- to a maximum possible number of substitutions, or no substitution; R, R, R, R, and Rare each independently selected from a variety of substituents; any two substitutions in R, R, R, R, and Rare optionally joined to form a ring; at least one pair of substitutions in R, R, R, R, and Rare joined together to form a bridge structure comprising a backbone structure that forms a fused first ring, which can be further substituted; and the backbone structure is saturated. Organic light emitting devices and consumer products containing the compounds are also disclosed.

A compound having a metal coordination complex structure, where the compound is capable of functioning as a phosphorescent emitter in an organic light emitting device at room temperature is disclosed. The compound has a first ligand coordinated to a metal. The free-state of the first ligand has a first triplet energy T1 of Eat 77K, while the compound has a first triplet energy T1 of E at 77K, and the difference in energy (&#x394;E) between E and Eis &#x2264;250 meV. The compound has a triplet emission spectrum with a FWHM value of no more than 45 nm. Organic light emitting devices, consumer products, and formulations containing the compounds are also disclosed.

Embodiments of the disclosed subject matter provide an organic light emitting diode (OLED) having an anode, a cathode, an emissive layer disposed between the anode and the cathode, and a hole blocking layer disposed between the emissive and the cathode. The emissive layer may include a phosphorescent dopant, where the phosphorescent dopant has an emission in 0.5% doped PMMA (Poly(methyl methacrylate)) thin film with a peak maximum wavelength that is greater than or equal to 600 nm at room temperature. The energy of a highest occupied molecular orbital (HOMO) of the phosphorescent dopant may be lower than or equal to &#x2212;5.1 eV, and the energy of the HOMO of the hole blocking layer is at least 0.1 eV lower than the energy of the HOMO of the phosphorescent dopant.

Deep HOMO (highest occupied molecular orbital) emitter device structures

A compound is disclosed that has a metal coordination complex structure having at least two ligands coordinated to the metal; wherein the compound has a first substituent Rat one of the ligands' periphery; wherein a first distance is defined as the distance between the metal and one of the atoms in Rwhere that atom is the farthest away from the metal among the atoms in R; wherein the first distance is also longer than any other atom-to-metal distance between the metal and any other atoms in the compound; and wherein when a sphere having a radius r is defined whose center is at the metal and the radius r is the smallest radius that will allow the sphere to enclose all atoms in the compound that are not part of R, the first distance is longer than the radius r by at least 2.9 &#x394;.

Growing community of inventors

Philadelphia, PA, United States of America

Eric A Margulies