Photoelectrode and method for preparing the same

Patent metadata

Field	Value
Publication number	US-9666803-B2
Application number	US-201514800051-A
Country	US
Kind code	B2
Filing date	Jul 15, 2015
Priority date	Dec 21, 2011
Publication date	May 30, 2017
Grant date	May 30, 2017

Abstract

The present invention relates to an photoelectrode and the preparation method thereof, wherein said photoelectrode comprises a substrate and a titania layer composed of a mesoporous titania bead having a diameter of 200-1000 nm, specific surface area of 50-100 m 2 /g, porosity of 40-60%, pore radius of 5-20 nm, pore volume of 0.20-0.30 cm 3 /g, and the titania comprised in the bead is anatase titania.

First claim

We claim:

1. A method for preparing a photoelectrode, consisting of:
(1) preparing a mesoporous titania bead by:
(i) adding a steric agent and a titanium-containing precursor to ethanol for sol-gel reaction to form a sol-gel product, wherein the molar ratio of said steric agent : said titanium-containing precursor: ethanol is 0.1-1:1: 200-300, and the steric agent is a tertiary amine; and
(ii) heating said sol-gel product in water at 120-200° C. for 1-24 hours to obtain the mesoporous titania bead;

(2) providing a transparent non-conductive plastic substrate covered by a transparent conductive film;
(3) coating the mesoporous titania bead on said non-conductive plastic substrate to obtain a coated layer, in which the titania comprised in the bead is anatase titania; and
(4) pressing the coated layer from step (3) under room temperature to obtain said photoelectrode; and
optionally, between step (2) and step (3), coating a titania nanoparticle on said transparent non-conductive plastic substrate to obtain a titania nanoparticle layer, and said titania nanoparticle is not said mesoporous titania bead.

2. The method according to claim 1 , wherein said transparent conductive film is a ITO, FTO or TCO film.

3. The method according to claim 1 , wherein said transparent non-conductive plastic substrate is PEN or PET substrate.

4. The method according to claim 1 , wherein said coated layer has a thickness of 5-10 μm.

5. The method according to claim 1 , wherein said titania nanoparticle layer has a thickness of 3-5 μm.

6. The method according to claim 1 , which is applied to manufacture a photoelectrode of a dye-sensitized solar cell.

7. The method according to claim 1 , wherein said pressing step is performed under 50 kg/cm 2 .

8. The method according to claim 1 , wherein said mesoporous titania bead has a diameter of 200-1000 nm, specific surface area of 50-100 m 2 /g, porosity of 40-60%, pore radius of 5-20 nm, pore volume of 0.20-0.30 cm 3 /g.

Assignees

• Univ Nat Cheng Kung

Inventors

• Ting Jyh-Ming
• Ke Chun-Ren

Classifications

• B82Y20/00 Primary

  Nanooptics, e.g. quantum optics or photonic crystals · CPC title

• H01G9/2031

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

• C01P2006/40

  Electric properties · CPC title

• C01P2004/64

  Nanometer sized, i.e. from 1-100 nanometer · CPC title

• Y02E10/542

  Dye sensitized solar cells · CPC title