Neetu Chopra

US Patent:

20120001127, Jan 5, 2012

Filed:

Jul 1, 2011

Appl. No.:

13/175710

Inventors:

Christopher T. Brown - Pittsburgh PA, US
Neetu Chopra - Pittsburgh PA, US
Christopher R. Knittel - Pittsburgh PA, US
Mathew Mathai - Gibsonia PA, US
Venkataramanan Seshadri - Pittsburgh PA, US
Jing Wang - Gibsonia PA, US
Brian Woodworth - Pittsburgh PA, US

International Classification:

H01B 1/12
C07C 211/61
C08F 226/02

US Classification:

252500, 526280, 564427

Abstract:

A composition comprising: at least one compound comprising a hole transporting core, wherein the core is covalently bonded to a first arylamine group and also covalently bonded to a second arylamine group different from the first, and wherein the compound is covalently bonded to at least one intractability group, wherein the intractability group is covalently bonded to the hole transporting core, the first arylamine group, the second arylamine group, or a combination thereof, and wherein the compound has a molecular weight of about 5,000 g/mole or less. Blended mixtures of arylamine compounds, including fluorene core compounds, can provide good film formation and stability when coated onto hole injection layers. Solution processing of OLEDs is a particularly important application.

US Patent:

20120003790, Jan 5, 2012

Filed:

Jul 1, 2011

Appl. No.:

13/175714

Inventors:

Christopher T. Brown - Pittsburgh PA, US
Neetu Chopra - Pittsburgh PA, US
Christopher R. Knittel - Pittsburgh PA, US
Mathew Mathai - Gibsonia PA, US
Venkataramanan Seshadri - Pittsburgh PA, US
Jing Wang - Gibsonia PA, US
Brian Woodworth - Pittsburgh PA, US

International Classification:

H01L 51/56
C08G 75/06
C08G 67/00

US Classification:

438 99, 524612, 524609, 257E51024

Abstract:

A composition comprising: at least one compound comprising a hole transporting core, wherein the core is covalently bonded to a first arylamine group and also covalently bonded to a second arylamine group different from the first, and wherein the compound is covalently bonded to at least one intractability group, wherein the intractability group is covalently bonded to the hole transporting core, the first arylamine group, the second arylamine group, or a combination thereof, and wherein the compound has a molecular weight of about 5,000 g/mole or less. Blended mixtures of arylamine compounds, including fluorene core compounds, can provide good film formation and stability when coated onto hole injection layers. Solution processing of OLEDs is a particularly important application.

US Patent:

20130009137, Jan 10, 2013

Filed:

Jun 29, 2012

Appl. No.:

13/539134

Inventors:

Christopher T. Brown - Pittsburgh PA, US
Neetu Chopra - Pittsburgh PA, US
Venkataramanan Seshadri - Monroeville PA, US
Jing Wang - Gibsonia PA, US

International Classification:

H01B 1/12
H01L 51/54
H01L 51/56

US Classification:

257 40, 252500, 438 99, 257E51026

Abstract:

Improved OLED devices and methods of making the same using vertical phase separation to simplify processing. Vertically phase separated material can include at least one lower first layer disposed on the electrode, and at least one upper second layer different from the first layer and disposed away from the electrode or optionally on one layer comprising at least one semiconducting organic material. The first layer can be enriched with at least one first semiconducting organic material (SOM 1) and the second layer can be enriched with at least one second semiconducting organic material (SOM 2) different from the SOM 1. The ink composition can be adapted so that the film vertically phase separates into the first and second layers. Compositions and devices are also embodied herein.

US Patent:

20130092887, Apr 18, 2013

Filed:

Oct 3, 2012

Appl. No.:

13/573676

Inventors:

Neetu Chopra - Pittsburgh PA, US

Assignee:

Plextronics, Inc. - Pittsburgh PA

International Classification:

H01B 1/12

US Classification:

25251921, 252500

Abstract:

A method including combining at least one first compound in a neutral form with at least one ionic dopant in a first solvent system to provide a first doped reaction product, isolating the first doped reaction product in solid form, and combining the isolated first doped reaction product with at least one conjugated polymer in neutral form in a second solvent system to form a second doped reaction product including an oxidized form of the conjugated polymer a neutral form of the first compound. Advantages include better stability, ease of use, and lower metal content. Applications include organic electronic devices including OLEDs.

US Patent:

20130344648, Dec 26, 2013

Filed:

Apr 23, 2013

Appl. No.:

13/868924

Inventors:

Neetu Chopra - Pittsburgh PA, US
Christopher Knittel - Pittsburgh PA, US
Mathew Mathai - Monroeville PA, US
Venkataramanan Seshadri - Pittsburgh PA, US
Jing Wang - Gibsonia PA, US
Brian Woodworth - Pittsburgh PA, US

Assignee:

Plextronics, Inc. - Pittsburgh PA

International Classification:

H01L 51/00

US Classification:

438 99

Abstract:

A composition comprising: at least one compound comprising a hole transporting core, wherein the core is covalently bonded to a first arylamine group and also covalently bonded to a second arylamine group different from the first, and wherein the compound is covalently bonded to at least one intractability group, wherein the intractability group is covalently bonded to the hole transporting core, the first arylamine group, the second arylamine group, or a combination thereof, and wherein the compound has a molecular weight of about 5,000 g/mole or less. Blended mixtures of arylamine compounds, including fluorene core compounds, can provide good film formation and stability when coated onto hole injection layers. Solution processing of OLEDs is a particularly important application.

US Patent:

20170186953, Jun 29, 2017

Filed:

Jan 19, 2017

Appl. No.:

15/410615

Inventors:

- Tokyo, JP
Neetu Chopra - Pittsburgh PA, US
Christopher R. Knittel - Pittsburgh PA, US
Mathew Mathai - Monroeville PA, US
Venkataramanan Seshadri - Powell OH, US
Jing Wang - Gibsonia PA, US
Brian Woodworth - Cheswick PA, US

International Classification:

H01L 51/00
C09D 11/52
C09D 11/102
C09B 69/10
C08G 73/02
C08F 226/02
C09B 57/00
H01L 51/50
C09D 11/106

Abstract:

A composition comprising: at least one compound comprising a hole transporting core, wherein the core is covalently bonded to a first arylamine group and also covalently bonded to a second arylamine group different from the first, and wherein the compound is covalently bonded to at least one intractability group, wherein the intractability group is covalently bonded to the hole transporting core, the first arylamine group, the second arylamine group, or a combination thereof, and wherein the compound has a molecular weight of about 5,000 g/mole or less. Blended mixtures of arylamine compounds, including fluorene core compounds, can provide good film formation and stability when coated onto hole injection layers. Solution processing of OLEDs is a particularly important application.