Organic light emitting displays and new fluorescent compounds

• US 6,627,111 B2
• Filed: 03/06/2001
• Issued: 09/30/2003
• Est. Priority Date: 03/06/2001
• Status: Expired due to Term

• Current Assignee: InnoLux Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Swanson, Sally Ann, Wallraff, Gregory Michael
• Primary Examiner(s): Yamnitzky, Marie
• Application Number:
  US09/798,894
• Publication Number:
  US 20020127428A1
• Time in Patent Office: 938 Days
• Field of Search: 428/690, 428/917, 313/504, 313/506, 257/40, 257/102, 257/103, 252/301.16, 252/301.35, 252/301.22, 252/301.32, 549/283, 549/288, 549/399, 549/404, 549/426, 544/99, 548/305.1
• US Class Current: 252/301.16
• CPC Class Codes: C07D 265/34 condensed with carbocyclic rings
• CPC Class Codes: C07D 309/32 having two double bonds between ring members or between ring members and non-ring members
• CPC Class Codes: C07D 311/16 substituted in position 7
• CPC Class Codes: C07D 405/04 directly linked by a ring-member-to-ring-member bond
• CPC Class Codes: C07D 417/04 directly linked by a ring-member-to-ring-member bond
• CPC Class Codes: C09K 11/06 containing organic luminescent materials
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 85/636 comprising heteroaromatic hydrocarbons as substituents on the nitrogen atom
• CPC Class Codes: H10K 85/653 comprising only oxygen as heteroatom
• CPC Class Codes: H10K 85/656 comprising two or more different heteroatoms per ring H10K85/652 takes precedence
• CPC Class Codes: H10K 85/657 Polycyclic condensed heteroaromatic hydrocarbons
• CPC Class Codes: Y10S 428/917 Electroluminescent

Abstract

An organic light emitting display is provided which comprises as an emitting layer a fluorescent dye having at least one amine moiety substituted with two aryl groups. Also provided are new fluorescent compounds having N-aryl substituents which exhibit reduced pH sensitivity and enhanced stability to protonation.

Claims

1. A fluorescent compound with the structural formula

2. An organic light emitting display with a fluorescent compound having the structural formula

3. A photoresist composition comprising an epoxy resin and a coumarin 7 analog of formula

wherein Ar is aryl or substituted aryl.

4. The composition of claim 3 wherein Ar is phenyl.