# US 7,745,520 B2 · Hybrid polymer light-emitting devices

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- Number: US 7,745,520 B2
- Document ID: US7745520B2
- Status: Granted
- Kind: B2
- Application number: 11/655,324
- Filed: 2007-01-18
- Published: 2008-04-10
- Granted: 2010-06-29
- Earliest claimed: 2006-10-05
- Assignees: The Regents of the University of California
- Inventors: Yan Shao; Guillermo C. Bazan; Alan J. Heeger
- Web page: https://patentgrep.com/patent/US7745520B2

## CPC

- H10K 50/135: comprising mobile ions
- C08K 5/19: Quaternary ammonium compounds
- C08K 5/42: Sulfonic acids; Derivatives thereof
- H10K 85/114: {Poly-phenylenevinylene; Derivatives thereof}
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)

## 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

### Claim 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.

### Claim 2 (depends on 1)

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

### Claim 3 (depends on 2)

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

### Claim 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 Tg range from 80° C. to 300° C.

### Claim 5 (depends on 4)

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.