Substrate for an organic field effect transistor, use of said substrate, method for increasing the charge carrier mobility, and organic field effect transistor (ofet)

• US 20050224787A1
• Filed: 06/06/2003
• Published: 10/13/2005
• Est. Priority Date: 06/13/2002
• Status: Active Grant

• Current Assignee: PolyIC GmbH & Co. KG (Leonhard KURZ Stiftung & Company KG)
• Original Assignee: PolyIC GmbH & Co. KG (Leonhard KURZ Stiftung & Company KG)
• Inventors: Clemens, Wolfgang
• Granted Patent: US 7,709,865 B2
• Time in Patent Office: Days
• US Class Current: 257/40
• CPC Class Codes: H10K 10/464 Lateral top-gate IGFETs comprising only a single gate
• CPC Class Codes: H10K 71/12 using liquid deposition, e.g. spin coating
• CPC Class Codes: H10K 99/00 Subject matter not provided for in other groups of this subclass

Abstract

An organic field effect transistor includes a well-ordered substrate layer on which organic functional material is deposited. A method of increasing the charge carrier mobility of the organic field effect transistor substrate layer is achieved by depositing onto the substrate an organic functional material, the substrate being in the form of a well-ordered layer. The method and transistor include using a well-ordered plastics film as the substrate layer.

Claims

1. A substrate and/or underlayer of an electronic component, which substrate or underlayer is to be coated with an organic functional layer, wherein said substrate or underlayer comprises a partially crystalline and/or axially stretched (well-ordered) plastics film such the orderliness of the plastics film enables the application of the functional material thereto in the form of a well-ordered layer.

2. A substrate as defined in claim 1, wherein the plastics film is at least partially crystalline and/or biaxially stretched.

3. A substrate as defined in claim 1, wherein the plastics film is monoaxially or biaxially stretched.

4. A substrate as defined in claims 1-3 and 8, wherein the plastics film is selected from any one of the group consisting of isotactic polypropylene, polyamide, polyethylene, or polyethylene terephthalate.

6. The use of a substrate and/or underlayer as defined in any one of claims 1 to 3 and 8 for the production of an OFET.

8. A substrate as defined in claim 2, wherein the plastics film is monoaxially or biaxially stretched.

9. The use of a substrate and/or underlayer as defined in claim 4 for the production of an OFET.

5. A method of increasing the charge carrier mobility of a conducting or semiconducting layer of organic material, wherein the conducting or semiconducting layer is formed on an undersurface comprising an oriented, stretched (well-ordered) plastics film.

7. An organic field effect transistor (OFET) having a semiconducting layer of organic material which exhibits a charge carrier mobility of μ

>

10<sup>−

3</sup> cm²/Vs.