Titanium dioxide photoelectrode and preparation method thereof

• Main Authors: SUN WENTAO, PENG LIANMAO, AI GUO
• Format: Patent
• Language: Chinese; English
• Published: 31.10.2012
• Subjects: BASIC ELECTRIC ELEMENTS; CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES ORLIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; SEMICONDUCTOR DEVICES; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

The invention provides a titanium dioxide photoelectrode and a preparation method thereof, and belongs to the solar photovoltaic conversion field. The titanium dioxide photoelectrode comprises an electroconductive substrate and a titanium dioxide nanorod (or nanowire) array arranged on the electroconductive substrate; and the titanium dioxide nanorod array is filled with titanium dioxide nanoparticles. According to the invention, a secondary structure of the titanium dioxide nanoparticles is constructed by adopting a simple liquid phase method on the basis of the titanium dioxide nanorod array; a membrane in a titanium dioxide nanorod-nanoparticle composite structure is formed; the prepared photoelectrode has the advantages that the specific surface area is large, and the electronic transmission performance is high; the adsorption of the electrode to a sensitizer is improved; and the transmission speed of an electron in the titanium dioxide electrode is increased, so that the photovoltaic conversion efficienc