Active materials for electro-optic devices and electro-optic devices

Patent metadata

Field	Value
Publication number	US-10026899-B2
Application number	US-201615238530-A
Country	US
Kind code	B2
Filing date	Aug 16, 2016
Priority date	Mar 29, 2011
Publication date	Jul 17, 2018
Grant date	Jul 17, 2018

Abstract

Tandem electro-optic devices and active materials for electro-optic devices are disclosed. Tandem devices include p-type and n-type layers between the active layers, which are doped to achieve carrier tunneling. Low bandgap conjugated polymers are also disclosed.

First claim

What is claimed is:

1. A polymer comprising a repeated unit having the structure of formula (I)

wherein R 1 , R 2 and R 3 are independently selected from alkyl groups with up to 18 Carbon atoms, aryls and substituted aryls;
X is selected from Oxygen, Sulfur, Selenium and Nitrogen atoms; and
Ar 1 and Ar 2 are each, independently, one to five monocyclic arylene, bicyclic arylene, and polycyclic arylene, monocyclic heteroarylene, bicyclic heteroarylene and polycyclic heteroarylene groups, either fused or linked.

2. The polymer of claim 1 , wherein Ar 1 and Ar 2 are independently selected from the group consisting of

where, in the above structures, R is a hydrogen atom fluorine atom, CF 3 , CN, NO 2 , or alkyl group with 1-18 Carbon atoms.

3. The polymer of claim 1 , wherein the repeated unit has the structure of formula (II),

where R 1 and R 3 are independently selected from alkyl groups with up to 18 Carbon atoms, aryls and substituted aryls.

4. The polymer of claim 3 wherein the R 1 and R 3 are independently selected from alkyl groups with 4 to 12 Carbon atoms.

5. The polymer of claim 4 , wherein R 1 is a 2-ethylhexyl group and R 3 is a 2-butyloctyl group.

6. An electro-optic device comprising a polymer according to claim 1 .

7. The device according to claim 6 , wherein said polymer is a photovoltaic material.

8. The device according to claim 6 , wherein said electro-optic device is a polymer solar cell device or photodetector device.

9. The device according to claim 8 , wherein said device is a polymer solar cell device comprising a bulk heterojunction structure.

10. The device according to claim 9 , wherein said bulk heterojunction structure comprises at least one ingredient in addition to said polymer.

11. The device according to claim 10 , wherein said at least one ingredient in addition to said polymer comprises a fullerene structure.

12. The device according to claim 10 , wherein said at least one ingredient is at least one of and insert PC 61 BM, PC 71 BM, or ICBA.

13. An electro-optic device, comprising:
a first electrode;
a second electrode spaced apart from said first electrode; and
a layer of active material disposed between said first electrode and said second electrode,
wherein said active layer comprises a polymer comprising a repeated unit having the structure of formula (I)

wherein n is an integer greater than 1;
R 1 , R 2 and R 3 are independently selected from alkyl groups with up to 18 Carbon atoms, aryls and substituted aryls;
X is selected from Oxygen, Sulfur, Selenium and Nitrogen atoms;
Ar 1 and Ar 2 is one to five monocyclic arylene, bicyclic arylene, polycyclic arylene, monocyclic heteroarylene, bicyclic heteroarylene or polycyclic heteroarylene groups, either fused or linked.

14. An electro-optic device according to claim 13 , further comprising a second layer of active material disposed between said first and second electrodes such that said electro-optic device is a tandem photovoltaic device.

Assignees

• Univ California

Inventors

• Yang Yang
• Dou Letian
• You Jing-Bi

Classifications

• C08G2261/18

  conjugated · CPC title

• C08G2261/91

  Photovoltaic applications · 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

• C08G2261/3223

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