Universal Display Corporation

Siu Tung Lam

Raymond Kwong

Chi Hang Lee

Kit Yee Tsang

Sze Kui Lam

Chuanjun Xia

Geza Szigethy

Jason Brooks

Scott Joseph

Ken-Tsung Wong

Tzu-Chin Yeh

Ir phenyl parazolepyrazole complexes substituted with one or more strong electron withdrawing groups such as cyano groups resulted in enhancing the metal to ligand charge transfer (MLCT) which in turn resulted in enhanced emission efficiency and red shifted emission.

Organic electroluminescent materials and devices

New organic materials having polyaromatic structure containing boron and high triplet energy are disclosed. The high triplet energy materials are useful as host materials in PHOLEDs and improve device quantum efficiency and stability.

A compound having a structure of Formula I: is described. In the structure of Formula I, R, R, and Rare each independently 5 or 6 membered aryl or heteroaryl rings; R, R, R, and A are selected from a variety of substituents, including being joined or fused to form a ring; A is optionally bonded to at least one benzo or azabenzo ring to form fused rings; Xis B, C, N, O, S or Se; and X-Xare independently B, C or N. Formulations and devices, such as an OLEDs, that include the compound containing a structure of Formula I are also described.

A family of phosphorescent emitter compounds containing a carbene ligand Lselected from the group consisting of: is disclosed. These compounds enhance the performance of OLEDs when incorporated therein.

The present invention includes high triplet hosts with a macrocyclic structure that may provide high device quantum efficiency in OLEDs.

A compound containing a partial structure of Formula I: is provided. In the structure of Formula I, M is a metal with an atomic number of at least 40; R, R, and Rare each independently 5 or 6 membered aryl or heteroaryl rings; R, R, R, and A are each independently selected from a variety of substituents and combinations thereof; A is optionally bonded to Ror Rto form a fused ring; Xis B, C, N, O, S or Se; X-Xare independently B, C or N; and Y-Yare independently C or N. Formulations and devices, such as an OLEDs, that include the compound containing a structure of Formula I are also described.

A compound including a ligand Lof Formula I, is described. In Formula I: rings A and B each independently represent a 5-membered or 6-membered carbocyclic or heterocyclic ring; X, Y, Z, and W are either carbon or nitrogen; Rto Rare selected from a variety of substituents, where adjacent substituents can be joined to form a fused ring; ligand Lis coordinated to a metal M by X-M and Y-M bonds; and ligand Lis optionally linked with other ligands to produce a tridentate, tetradentate, pentadentate or hexadentate ligand. Formulations and devices, such as an OLEDs, that include the compound that include a ligand Lof Formula I are also described.

A compound having the structure of Formula I is disclosed, where Ghas the structure and Ghas the structure In the structure of Formula I, Z is selected from Si and Ge; Xand Xare independently selected from the group consisting of O, S, and Se; the Y and Z atoms forming the six-membered rings in Formula I, G, and Gare each independently selected from C or N; each R, R, R, R, R, and Ris independently selected from a variety of substituents; at least one Ris L-A; at least one Ris L-A; Aand Aare each independently selected from carbazole, dibenzofuran, dibenzothiophene, dibenzoselenophene, triphenylene, and nitrogen-substituted variants thereof, which are optionally further substituted; and Land Lare each independently an organic linker. Formulations and devices, such as an OLEDs, that include the compound of Formula I are also described.

A compound that has the structure according to Formula 1: as well as, devices and formulations containing the compound of Formula 1 are disclosed. In the compound of Formula 1:

A compound having the structure of Formula 1, as well as, a first device and a formulation including the same are disclosed. In the structure of Formula 1: and or (b) Ris  In addition, R, R, R, R, A, A, A, A, A, A, A, A, A, A, B, B, B, B, B, B, B, B, B, B, Y, Y, Y, Y, Y, Y, Y, Y, Z, Z, Z, Z, Z, Z, Z, and Z, are each independently selected from a variety of substituents, where adjacent A, B, Y, and Z groups are, optionally, joined to form a fused ring structure. Finally, X includes an acceptor group selected from &#x2014;CF, &#x2014;SiF, &#x2014;NCO, &#x2014;NCS, &#x2014;OCN, &#x2014;SCN, &#x2014;OCF, and &#x2014;SCF.

Novel diarylamino phenyl carbazole compounds are provided. By appropriately selecting the nature of the diarylamino substituent and the substitution on the carbazole nitrogen, compounds with appropriate HOMO and LUMO energies can be obtained for use as materials in a secondary hole transport layer.

Organic materials for organic light emitting devices

Luminescent materials including donor-acceptor compounds with a high triplet energy heteropolyaromatic system, namely, dibenzofuran, dibenzothiophene and dibenzoselenophene with one or multiple nitrogens in the ring as the electron acceptor for use as emitters in organic light emitting diodes is disclosed.

Novel devices containing organic compounds containing electron donor and acceptor characteristics and that act as emissive dopants are provided. The energy ratio obtained by dividing the T1 energy of the emissive dopant by &#x394;Efor the same emissive dopant is at least 0.7 and the first emissive dopant has an energy difference calculated by subtracting the T1 energy of the first emissive dopant from &#x394;Efor the first emissive dopant and the energy difference is at smaller than or equal to 1.00 eV for the novel compounds. The compounds exhibit delayed fluorescence properties when incorporated into OLED devices.

Growing community of inventors

Hong Kong, China

Siu Tung Lam