Polymer, organic thin-film solar cell using the same, and electronic product comprising the cell

Patent metadata

Field	Value
Publication number	US-9865831-B2
Application number	US-201514701263-A
Country	US
Kind code	B2
Filing date	Apr 30, 2015
Priority date	Nov 1, 2012
Publication date	Jan 9, 2018
Grant date	Jan 9, 2018

Abstract

To provide a polymer excellent enough in photoelectric 5 conversion efficiency and in light resistance to be suitable for solar cells, also to provide a solar cell using the polymer, and further to provide an electronic product comprising the cell. Embodiments of the present disclosure provide a polymer comprising a repeating unit of the following formula (M1).

In the formula, R 1 is a substituent group selected from the group 15 consisting of alkyl groups, and alkoxy groups; each R 2 is independently a substituent group selected from the group consisting of hydrogen, halogen, alkyl groups, alkoxy groups, and aryl groups; and each X is independently an atom selected from the group consisting of O, S and Se. The embodiments 20 also provide a solar cell having an active layer containing the above polymer and further an electronic product comprising that cell.

First claim

The invention claimed is:

1. A polymer comprising:
(i) a repeating unit represented by formula (M1):

 and
(ii) a repeating unit represented by formula (M3):

wherein, in formulae (M1) and (M3):
R 1 is a substituent group selected from the group consisting of unsubstituted alkyl groups, substituted alkyl groups, unsubstituted alkoxy groups, substituted alkoxy groups, unsubstituted aryl groups, and substituted aryl groups;
each R 2 is independently a substituent group selected from the group consisting of hydrogen, halogen, unsubstituted alkyl groups, substituted alkyl groups, unsubstituted alkoxy groups, substituted alkoxy groups, unsubstituted aryl groups, and substituted aryl groups; and
each X is independently an atom selected from the group consisting of O, S and Se,
wherein said polymer has a weight average molecular weight of 3000 to 1000000.

2. The polymer according to claim 1 , wherein every X is O.

3. The polymer according to claim 1 , wherein said R 1 is a substituent group selected from the group consisting of unsubstituted alkyl groups, substituted alkyl groups, unsubstituted aryl groups, and substituted aryl groups.

4. The polymer according to claim 1 , which comprises the repeating unit represented by the formula (M1) in an amount of 50 mol % or more based on the total molar amount of all the repeating units.

5. The polymer according to claim 1 , which further comprises a repeating unit represented by formula (M2):

wherein:
L is a crosslinkable group; and
R 2 and X are as defined for formulae (M1) and (M3).

6. The polymer according to claim 5 , which comprises the repeating units represented by the formulas (M2) and (M3) in an amount of 0.1 to 50 mol % in total based on the total molar amount of all the repeating units.

7. The polymer according to claim 1 , wherein at least one of said R 2 s is a crosslinkable group.

8. The polymer according to claim 1 , wherein each terminal group is independently an aryl group having an electron-withdrawing group or an aryl group having an electron-donating group.

9. The polymer according to claim 1 , wherein either terminal group is a crosslinkable group.

10. A solar cell comprising the polymer according to claim 1 .

11. A bulk hetero-junction type organic thin-film solar cell comprising an active layer in which the polymer according to claim 1 and a fullerene derivative are contained as an electron donor and an electron acceptor, respectively.

12. An electronic product comprising the solar cell according to claim 10 as a power supply device.

13. A polymer comprising a repeating unit represented by formula (m1):

wherein:
R 1 is a substituent group selected from the group consisting of unsubstituted alkyl groups, substituted alkyl groups, unsubstituted alkoxy groups, substituted alkoxy groups, unsubstituted aryl groups, and substituted aryl groups;
each R 2 is independently a substituent group selected from the group consisting of hydrogen, halogen, unsubstituted alkyl groups, substituted alkyl groups, unsubstituted alkoxy groups, substituted alkoxy groups, unsubstituted aryl groups, and substituted aryl groups; and
every X is O,
wherein said polymer has a weight average molecular weight of 3000 to 1000000.

14. A solar cell comprising the polymer according to claim 13 .

15. A bulk hetero junction type organic thin-film solar cell comprising an active layer in which the polymer according to claim 13 and a fullerene derivative are contained as an electron donor and an electron acceptor, respectively.

16. An electronic product comprising the solar cell according to claim 14 as a power supply device.

Assignees

• Toshiba Kk

Inventors

• Nakano Yoshihiko
• Gotanda Takeshi
• Hayase Rumiko
• Kudo Yuki

Classifications

• C08G75/10

  from sulfur or sulfur-containing compounds and aldehydes or ketones · CPC title

• H01L51/426 Primary

  Electricity · mapped topic

• H10K30/50

  Photovoltaic [PV] devices · CPC title

• H10K30/35

  comprising inorganic nanostructures, e.g. CdSe nanoparticles · CPC title

• C08G61/126 Primary

  with a five-membered ring containing one sulfur atom in the ring · CPC title