Dye-sensitized solar cell, dye-sensitized solar cell module, and coating liquid for forming electrolyte layer

Patent metadata

Field	Value
Publication number	US-9368286-B2
Application number	US-201213364941-A
Country	US
Kind code	B2
Filing date	Feb 2, 2012
Priority date	Aug 7, 2009
Publication date	Jun 14, 2016
Grant date	Jun 14, 2016

Abstract

An object of the present invention is to provide a dye-sensitized solar cell having a solid electrolyte layer and improved durability or photoelectric conversion efficiency. A dye-sensitized solar cell 1 , which comprises: a conductive base material 10 ; a porous semiconductor layer 20 formed on the conductive base material 10 having a porous surface carrying a sensitized dye; a counter electrode 40 , which is disposed so as to face the porous semiconductor layer 20 ; and an electrolyte layer 30 comprising potassium iodide and a thermoplastic cellulose resin, which is formed between the conductive base material 10 and the counter electrode 40.

First claim

The invention claimed is:

1. A dye-sensitized solar cell, which comprises:
a conductive base material;
a porous semiconductor layer formed on the conductive base material having a porous surface carrying a sensitized dye;
a counter electrode, which is disposed so as to face the porous semiconductor layer; and
a solid electrolyte layer comprising potassium iodide and a thermoplastic cellulose resin, which is formed between the conductive base material and the counter electrode,
wherein the thermoplastic cellulose resin is a cationic cellulose ester or cellulose ether having a covalent bond to a cationization agent.

2. The dye-sensitized solar cell according to claim 1 , wherein an iodine concentration in the electrolyte layer is 0% to 3% by weight.

3. A dye-sensitized solar cell module, which is obtained by connecting a plurality of the dye-sensitized solar cells according to claim 1 in series or in parallel.

4. A dye-sensitized solar cell, which comprises:
a conductive base material;
a porous semiconductor layer formed on the conductive base material having a porous surface carrying a sensitized dye;
a counter electrode, which is disposed so as to face the porous semiconductor layer; and
an electrolyte layer comprising potassium iodide and a thermoplastic cellulose resin, which is formed between the conductive base material and the counter electrode,
wherein the thermoplastic cellulose resin is a cationic cellulose ester or cellulose ether having a covalent bond to a cationization agent,
and wherein the thermoplastic cellulose resin is contained in the electrolyte layer at a concentration of 5% by weight to 60% by weight.

5. The dye-sensitized solar cell according to claim 4 , wherein an iodine concentration in the electrolyte layer is 0% to 3% by weight.

6. A dye-sensitized solar cell module, which is obtained by connecting a plurality of the dye-sensitized solar cells according to claim 4 in series or in parallel.

7. A dye-sensitized solar cell module, which is obtained by connecting a plurality of the dye-sensitized solar cells according to claim 5 in series or in parallel.

8. The dye-sensitized solar cell according to claim 1 , wherein the cationic cellulose ester or cellulose ether is a cationic hydroxy ethylcellulose cationized with 3-chloro-2-hydroxy propyltrimethyl ammonium chloride.

9. The dye-sensitized solar cell according to claim 4 , wherein the cationic cellulose ester or cellulose ether is a cationic hydroxy ethylcellulose cationized with 3-chloro-2-hydroxy propyltrimethyl ammonium chloride.

Assignees

• Obonai Naohiro
• Fujiwara Ryo
• Dainippon Printing Co Ltd

Inventors

• Obonai Naohiro
• Fujiwara Ryo

Classifications

• Y02E10/542

  Dye sensitized solar cells · CPC title

• H01G9/2009 Primary

  Solid electrolytes · CPC title

• H01G9/2059

  comprising an organic dye as the active light absorbing material, e.g. adsorbed on an electrode or dissolved in solution · CPC title

• H01G9/2031

  comprising titanium oxide, e.g. TiO2 (H01G9/2036 takes precedence) · CPC title