Conductive composition for forming solar cell collector electrode, solar cell, and solar cell module

Patent metadata

Field	Value
Publication number	US-2018057632-A1
Application number	US-201515545519-A
Country	US
Kind code	A1
Filing date	Jun 25, 2015
Priority date	Jul 11, 2014
Publication date	Mar 1, 2018
Grant date	—

Abstract

An object of the present invention is to provide: a conductive composition for forming a solar cell collector electrode that can form a collector electrode with favorable adhesion with regard to a transparent conductive layer; a solar cell having a collector electrode formed using the composition; and a solar cell module. A conductive composition for forming a solar cell collector electrode, includes: a metal powder (A); an epoxy resin (B); a cationic curing agent (C); and a blocked carboxylic acid (D); wherein the blocked carboxylic acid (D) is a compound obtained by reacting a compound (d1) selected from carboxylic acids and carboxylic acid anhydrides with a vinyl ether compound (d2).

First claim

1 . A conductive composition for forming a solar cell collector electrode, comprising:
a metal powder (A); an epoxy resin (B); a cationic curing agent (C); and a blocked carboxylic acid (D); wherein the blocked carboxylic acid (D) is a compound obtained by reacting a compound (d1) selected from carboxylic acids and carboxylic acid anhydrides with a vinyl ether compound (d2).

2 . The conductive composition for forming a solar cell collector electrode according to claim 1 , wherein the amount of the blocked carboxylic acid (D) is 0.05 to 5 parts by mass with regard to 100 parts by mass of the metal powder (A).

3 . The conductive composition for forming a solar cell collector electrode according to claim 1 , wherein the metal powder (A) contains both spherical metal powder (A1) and flaky metal powder (A2) at a mass ratio (A1:A2) of 70:30 to 30:70.

4 . The conductive composition for forming a solar cell collector electrode according to claim 1 , wherein the blocked carboxylic acid (D) is a polymeric blocked carboxylic acid obtained by addition polymerizing a dicarboxylic acid and a divinyl ether compound.

5 . The conductive composition for forming a solar cell collector electrode according to claim 1 , wherein the number of carbon atoms in the compound (d1) is 3 to 9.

6 . The conductive composition for forming a solar cell collector electrode according to claim 1 , wherein the number of carbon atoms in the compound (d1) is any one of 3, 5, 7 or 9.

7 . The conductive composition for forming a solar cell collector electrode according to claim 1 , wherein the compound (d1) is at least one type of dicarboxylic acid selected from the group consisting of malonic acid, glutaric acid, pimelic acid, and azelaic acid.

8 . A solar cell, comprising:
a collector electrode; and a transparent conductive layer as a foundation layer of the collector electrode; wherein the collector electrode is formed using the conductive composition for forming a solar cell collector electrode according to claim 1 .

9 . A solar cell module using the solar cell according to claim 8 .

10 . The conductive composition for forming a solar cell collector electrode according to claim 2 , wherein the metal powder (A) contains both spherical metal powder (A1) and flaky metal powder (A2) at a mass ratio (A1:A2) of 70:30 to 30:70.

11 . The conductive composition for forming a solar cell collector electrode according to claim 2 , wherein the blocked carboxylic acid (D) is a polymeric blocked carboxylic acid obtained by addition polymerizing a dicarboxylic acid and a divinyl ether compound.

12 . The conductive composition for forming a solar cell collector electrode according to claim 3 , wherein the blocked carboxylic acid (D) is a polymeric blocked carboxylic acid obtained by addition polymerizing a dicarboxylic acid and a divinyl ether compound.

13 . The conductive composition for forming a solar cell collector electrode according to claim 2 , wherein the number of carbon atoms in the compound (d1) is 3 to 9.

14 . The conductive composition for forming a solar cell collector electrode according to claim 3 , wherein the number of carbon atoms in the compound (d1) is 3 to 9.

15 . The conductive composition for forming a solar cell collector electrode according to claim 2 , wherein the number of carbon atoms in the compound (d1) is any one of 3, 5, 7 or 9.

16 . The conductive composition for forming a solar cell collector electrode according to claim 3 , wherein the number of carbon atoms in the compound (d1) is any one of 3, 5, 7 or 9.

17 . The conductive composition for forming a solar cell collector electrode according to claim 2 , wherein the compound (d1) is at least one type of dicarboxylic acid selected from the group consisting of malonic acid, glutaric acid, pimelic acid, and azelaic acid.

18 . The conductive composition for forming a solar cell collector electrode according to claim 3 , wherein the compound (d1) is at least one type of dicarboxylic acid selected from the group consisting of malonic acid, glutaric acid, pimelic acid, and azelaic acid.

19 . A solar cell, comprising:
a collector electrode; and a transparent conductive layer as a foundation layer of the collector electrode; wherein the collector electrode is formed using the conductive composition for forming a solar cell collector electrode according to claim 2 .

20 . A solar cell, comprising:
a collector electrode; and a transparent conductive layer as a foundation layer of the collector electrode; wherein the collector electrode is formed using the conductive composition for forming a solar cell collector electrode according to claim 3 .

Assignees

• Yokohama Rubber Co Ltd

Inventors

• Sato Nao
• Ishikawa Kazunori

Classifications

• H05K1/095

  for polymer thick films, i.e. having a permanent organic polymeric binder · CPC title

• H05K1/092

  Dispersed materials, e.g. conductive pastes or inks · CPC title

• C08G2650/56

  Polyhydroxyethers, e.g. phenoxy resins · CPC title

• C08G59/58 Primary

  with polycarboxylic acids or with anhydrides, halides, or low-molecular-weight esters thereof · CPC title

• C03C2217/479

  Metals · CPC title