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Title:
METHOD FOR PRODUCING TITANIUM OXIDE PARTICLES FOR USE IN PHOTOVOLTAIC CELLS
Document Type and Number:
WIPO Patent Application WO2001081244
Kind Code:
A3
Abstract:
A method for producing titanium dioxide particles for use in photovoltaic cells. The process comprises the steps of preparing an aqueous solution of a titanium salt, precipitating the acidic titanium salt with an ammonium hydroxide while maintaining the temperature from 20 DEG C to 95 DEG C. The precipitate is filtered, washed with water until the conductivity of water is less than 500 microohms and then drying and calcining the precipitate. The obtained particles are milled until they range in size from 0.1 to 10 microns. The titanium dioxide having a high porosity, high bulk density and high surface area is used in photovoltaic cells.

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Inventors:
WANG YING
SWANSON DONALD KEITH
Application Number:
PCT/US2001/013384
Publication Date:
July 11, 2002
Filing Date:
April 25, 2001
Export Citation:
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Assignee:
DU PONT (US)
International Classes:
C01G23/053; H01G9/00; H01G9/20; H01L31/04; H01M14/00; (IPC1-7): C01G23/053
Domestic Patent References:
WO1997007058A11997-02-27
Foreign References:
US5011674A1991-04-30
EP0899236A11999-03-03
EP0264747A11988-04-27
Other References:
ZHANG Q-H ET AL: "Preparation and characterization of nanosized TiO2 powders from aqueous TiCl4 solution", NANOSTRUCTURED MATERIALS, ELSEVIER, NEW YORK, NY, US, vol. 11, no. 8, November 1999 (1999-11-01), pages 1293 - 1300, XP004203107, ISSN: 0965-9773
WANG Y ET AL: "PREPARATION, CHARATERIZATION AND PHOTOELECTROCHEMICAL BEHAVIORS OF FE(111)-DOPED TIO2 NANOPARTICLES", JOURNAL OF MATERIALS SCIENCE, CHAPMAN AND HALL LTD. LONDON, GB, vol. 34, no. 15, 1 August 1999 (1999-08-01), pages 3721 - 3729, XP000851668, ISSN: 0022-2461
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