# US 5,700,696 A · Method for preparation of conjugated arylene or heteroarylene vinylene polymer and device including same

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 5,700,696 A
- Document ID: US5700696A
- Status: Granted
- Kind: A
- Application number: 08/148,599
- Filed: 1993-11-08
- Granted: 1997-12-23
- Earliest claimed: 1993-11-08
- Assignees: Lucent Technologies Inc.
- Inventors: Edwin Arthur Chandross; Mary Ellen Galvin-Donoghue; Fotios Papadimitrakopoulos
- Web page: https://patentgrep.com/patent/US5700696A

## CPC

- C08G 61/02: Macromolecular compounds containing only carbon atoms in the main chain of the macromolecule, e.g. polyxylylenes
- C09K 11/06: containing organic luminescent materials
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE

## Abstract

A technique is described for the preparation of conjugated arylene and heteroarylene vinylene polymers wherein conversion of the polymer precursor is effected at a temperature ranging from 150.degree.-300.degree. C. in the presence of forming gas. Studies have shown that the presence of the forming gas suppresses the formation of carbonyl groups, so resulting in an enhancement in photoluminescence and electroluminescence efficiency of the polymer.

## Claims

### Claim 1

Method for the preparation of conjugated arylene and heteroarylene vinylene polymers which comprises thermal conversion of a precursor polymer of the general formula ##STR4## wherein R.sub.1 is selected from the group consisting of benzene, substituted benzene, anthracene, naphthalene and alkyl substituted benzene, and a five member cyclic heterocarbon,
R.sub.2 and R.sub.4 are selected from the group consisting of hydrogen and phenyl groups, and
R.sub.3 is an organic group capable of being eliminated at elevated temperatures to form a double bond, or an OR.sub.5 group wherein R.sub.5 is selected from the group consisting of hydrogen and methyl groups, conversion being effected at a temperature ranging from 150.degree.-300.degree. C. in the presence of forming gas.

### Claim 2 (depends on 1)

Method in accordance with claim 1 wherein the gas comprises at least 5% hydrogen.

### Claim 3 (depends on 1)

Method in accordance with claim 1 wherein the thermal conversion is effected at 200.degree. C.

### Claim 4 (depends on 1)

Method in accordance with claim 1 wherein a thin film of the precursor polymer is prepared by spin coating a thin film thereof upon a substrate and effecting thermal conversion of the film.

### Claim 5 (depends on 1)

Method in accordance with claim 1 wherein the substrate is fused silica glass.

### Claim 6 (depends on 1)

Method in accordance with claim 1 wherein the substrate is a silicon wafer.

### Claim 7 (depends on 1)

Method in accordance with claim 1 wherein the substrate is indium tin oxide coated glass.

### Claim 8 (depends on 1)

Method in accordance with claim 1 wherein the forming gas is comprised of 85% nitrogen and 15% hydrogen.

### Claim 9 (depends on 1)

Method in accordance with claim 1 wherein the precursor film is maintained in an inert atmosphere and protected from exposure to ultraviolet and visible light with the exception of red light during the preparative stages.

### Claim 10 (depends on 1)

Method in accordance with claim 1 wherein the conjugated polymer is poly (p-phenylene vinylene).