Viscous dispersion liquid and method for producing same, porous semiconductor electrode substrate, and dye-sensitized solar cell

Patent metadata

Field	Value
Publication number	US-2017140880-A1
Application number	US-201515322133-A
Country	US
Kind code	A1
Filing date	Jul 6, 2015
Priority date	Jul 8, 2014
Publication date	May 18, 2017
Grant date	—

Abstract

Provided is a viscous dispersion liquid useful for forming a semiconductor porous film (porous semiconductor layer) by low-temperature deposition. The viscous dispersion liquid contains water as a dispersion medium, and titanium dioxide nanoparticles, wherein the viscous dispersion liquid has a solid content concentration of 30% by mass to 60% by mass, the titanium dioxide nanoparticles include anatase crystalline titanium dioxide nanoparticles having an average particle diameter of 10 nm to 100 nm, and brookite crystalline titanium dioxide nanoparticles having an average particle diameter of 5 nm to 15 nm, and the viscous dispersion liquid has a viscosity of 10 Pa·s to 500 Pa·s at 25° C.

First claim

1 . A viscous dispersion liquid comprising:
water as a dispersion medium; and titanium dioxide nanoparticles, wherein
the viscous dispersion liquid has a solid content concentration of 30% by mass to 60% by mass,
the titanium dioxide nanoparticles include anatase crystalline titanium dioxide nanoparticles having an average particle diameter of 10 nm to 100 nm, and brookite crystalline titanium dioxide nanoparticles having an average particle diameter of 5 nm to 15 nm, and
the viscous dispersion liquid has a viscosity of 10 Pa·s to 500 Pa·s at 25° C.

2 . The viscous dispersion liquid of claim 1 , wherein the anatase crystalline titanium dioxide nanoparticles include anatase crystalline titanium dioxide nanoparticles (a) having an average particle diameter of 30 nm to 100 nm.

3 . The viscous dispersion liquid of claim 2 , wherein the anatase crystalline titanium dioxide nanoparticles further include anatase crystalline titanium dioxide nanoparticles (b) having an average particle diameter of 10 nm to 25 nm.

4 . The viscous dispersion liquid of claim 2 , wherein a proportion of the anatase crystalline titanium dioxide nanoparticles (a) in the anatase crystalline titanium dioxide nanoparticles is 60% by mass or more.

5 . The viscous dispersion liquid of claim 1 , prepared by adding the anatase crystalline titanium dioxide nanoparticles into a water dispersion of the brookite crystalline titanium dioxide nanoparticles.

6 . A method of producing the viscous dispersion liquid of claim 1 , comprising:
adding the anatase crystalline titanium dioxide nanoparticles into a water dispersion of the brookite crystalline titanium dioxide nanoparticles.

7 . The method of claim 6 , wherein adding the anatase crystalline titanium dioxide nanoparticles comprises: (a) adding anatase crystalline titanium dioxide nanoparticles (a) having an average particle diameter of 30 nm to 100 nm; and (b) adding anatase crystalline titanium dioxide nanoparticles (b) having an average particle diameter of 10 nm to 25 nm.

8 . A porous semiconductor electrode substrate comprising:
a conductive substrate; and a porous semiconductor layer formed by applying the viscous dispersion liquid of claim 1 onto the conductive substrate, and drying the viscous dispersion liquid applied.

9 . A dye-sensitized solar cell comprising the porous semiconductor electrode substrate of claim 8 .

Assignees

• Zeon Corp

Inventors

• Kogure Hideo
• Aoyama Kousuke
• Kishimoto Shinzo
• Ikegami Masashi

Classifications

• C01G23/047

  Titanium dioxide · CPC title

• Y02E10/542

  Dye sensitized solar cells · CPC title

• C09C1/3607

  Titanium dioxide · CPC title

• C09D1/00

  Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances · CPC title

• H01G9/2068

  Panels or arrays of photoelectrochemical cells, e.g. photovoltaic modules based on photoelectrochemical cells · CPC title