UV patternable polymer blends for organic thin-film transistors

Patent metadata

Field	Value
Publication number	US-12052911-B2
Application number	US-201917291406-A
Country	US
Kind code	B2
Filing date	Oct 22, 2019
Priority date	Nov 5, 2018
Publication date	Jul 30, 2024
Grant date	Jul 30, 2024

Abstract

A cross-bred organic semiconductor (OSC) polymer, includes a diketopyrrolopyrrole (DPP)-fused thiophene polymeric material, such that: the DPP-fused thiophene polymeric material comprises a first linear alkyl-substituted DPP portion and a second branched alkyl-substituted DPP portion, the cross-bred OSC polymer comprises a repeat unit having both the first linear alkyl-substituted DPP portion and the second branched alkyl-substituted DPP portion, and the fused thiophene is beta-substituted.

First claim

What is claimed is:

1. A polymer blend, comprising:
at least one cross-bred organic semiconductor (OSC) polymer and at least one crosslinker,
wherein:
the at least one cross-bred OSC polymer is a diketopyrrolopyrrole (DPP)-fused thiophene polymeric material,
the DPP-fused thiophene polymeric material comprises a first linear alkyl-substituted DPP portion and a second branched alkyl-substituted DPP portion,
the fused thiophene is beta-substituted, and
the at least one crosslinker comprises at least one of:

(A) a polymer selected from:

wherein n is an integer greater than or equal to two, or
(B) a small-molecule selected from:

or,
(C) a combination thereof.

2. The polymer blend of claim 1 , further comprising:
at least one photoinitiator, wherein the at least one photoinitiator is present in a range of 0.1 wt. % to 10 wt. %.

3. The polymer blend of claim 1 , further comprising:
at least one of antioxidants, lubricants, compatibilizers, leveling agents, or nucleating agents present in a range of 0.05 wt. % to 5 wt. %.

4. The polymer blend of claim 1 , wherein the first linear alkyl-substituted DPP portion and the second branched alkyl-substituted DPP portion are each, independently, a repeat unit of Formula 1 or Formula 2, or a salt or isomer thereof:

wherein in Formula 1 and Formula 2:
m is an integer greater than or equal to one;
n is 0, 1, or 2;
R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , and R 8 , may be, independently, hydrogen, substituted or unsubstituted C 4 or greater alkyl, substituted or unsubstituted C 4 or greater alkenyl, substituted or unsubstituted C 4 or greater alkynyl, or C 5 or greater cycloalkyl;
a, b, c, and d are independently, integers greater than or equal to 3;
e and f are integers greater than or equal to zero;
X and Y are, independently a covalent bond, an optionally substituted aryl group, an optionally substituted heteroaryl, an optionally substituted fused aryl or fused heteroaryl group, an alkyne or an alkene; and
A and B may be, independently, either S or O, with the provisos that:
i. at least one of R 1 or R 2 ; one of R 3 or R 4 ; one of R 5 or R 6 ; and one of R 7 or Re is a substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, or cycloalkyl;
ii. e and f cannot both be 0;
iii. if either e or f is 0, then c and d, independently, are integers greater than or equal to 5.

5. The polymer blend of claim 1 , wherein the at least one cross-bred OSC polymer comprises a repeat unit having: the first linear alkyl-substituted DPP portion, the second branched alkyl-substituted DPP portion, and at least one fused thiophene.

6. The polymer blend of claim 1 , wherein the at least one cross-bred OSC polymer comprises a repeat unit having: the first linear alkyl-substituted DPP portion, the second branched alkyl-substituted DPP portion, and at least two fused thiophenes.

Assignees

• Corning Inc

Inventors

• Deng Huayun
• He Mingqian
• Li Xin
• Li Yang
• Niu Weijun
• Wallace Arthur Lawrence
• Wang Hongxiang

Classifications

• C08G2261/3223

  containing one or more sulfur atoms as the only heteroatom, e.g. thiophene · CPC title

• C08G2261/3241

  containing one or more nitrogen atoms as the only heteroatom, e.g. carbazole · CPC title

• C08G2261/3243

  containing one or more sulfur atoms as the only heteroatom, e.g. benzothiophene · CPC title

• C08G2261/1412

  Saturated aliphatic units · CPC title

• C08G2261/122

  statistical · CPC title