Hybrid polymer light-emitting devices

• US 7,745,520 B2
• Filed: 01/18/2007
• Issued: 06/29/2010
• Est. Priority Date: 10/05/2006
• Status: Expired due to Fees

• Current Assignee: Regents of the University of California (University of California)
• Original Assignee: Regents of the University of California (University of California)
• Inventors: Shao, Yan, Bazan, Guillermo C., Heeger, Alan J.
• Primary Examiner(s): Wu; David
• Assistant Examiner(s): NGUYEN, VU ANH
• Application Number:
  US11/655,324
• Publication Number:
  US 20080084158A1
• Time in Patent Office: 1,258 Days
• Field of Search: 252/301.35, 429/213, 524/86, 524/104, 524/115, 524/186, 524/236
• US Class Current: 524/106
• CPC Class Codes: C08K 5/19 Quaternary ammonium compounds
• CPC Class Codes: C08K 5/42 Sulfonic acids; Derivatives thereof
• CPC Class Codes: H10K 50/135 comprising mobile ions
• CPC Class Codes: H10K 85/114 Poly-phenylenevinylene; Derivatives thereof

Abstract

Mixtures and light-emitting devices that incorporate such mixtures are disclosed in which a soluble phenyl-substituted poly(para-phenylene vinylene) (PPV) copolymer (“superyellow”) is used as the host light-emitting polymer and methyltrioctylammonium trifluoromethanesulfonate, an ionic liquid, is used to introduce a dilute concentration of mobile ions into the emitting polymer layer. These mixtures and devices incorporating them are able to combine some of the characteristics of polymer light emitting diodes (PLEDs) and polymer light-emitting electrochemical cells (PLECs).

Claims

1. A mixture comprising a single phase combination of a light-emitting polymer and an ionic liquid soluble in the polymer, wherein said ionic liquid is a compound selected from the group consisting of methyltrioctylammonium trifluoromethanesulfonate, 1-Methyl-3-octylimidazolium octylsulfate, 1-Butyl-2,3-dimethylimidazolium octylsulfate, 1-octadecyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, 1-octadecyl-3-methylimidazolium tris(pentafluoroethyl)trifluorophosphate, 1,1-dipropylpyrrolidinium bis(trifluoromethylsulfonyl)imide, trihexyl(tetradecyl)phosphonium bis(1,2-benzenediolato(2-)-O,O′

)borate, and N,N,N′

,N′

,N″

-pentamethyl-N″

propylguanidinium trifluoromethanesulfonate.

2. The mixture of claim 1, wherein the ionic liquid is methyltrioctylammonium trifluoromethanesulfonate.

3. The mixture of claim 2, wherein the light-emitting polymer is a phenyl-substituted poly(para-phenylene vinylene) (PPV) copolymer.

4. A mixture comprising a single phase combination of a light-emitting polymer and an ionic liquid soluble in the polymer, further comprising a compound with a T_g range from 80°

C. to 300°

C.

5. The mixture of claim 4, wherein the compound is selected from a group consisting of benzocyclobutene homopolymer, benzocyclobutene copolymer, pentadiene homopolymer and copolymer, and trifluorovinyl ether derivatives.