Columnar-structured rutile TiO2 film with a thickness of 1.4 μm is prepared using the radio-frequency (RF) magnetron sputtering technique, for application in dye-sensitized solar cells (DSSCs). Pure rutile TiO2 films are fabricated by controlling the substrate temperature during sputtering and using a substrate with a rough surface morphology. Successive substrate heating to 623 K induces the growth of a rutile TiO2 film that has a specific direction in the (1 1 0) plane, which results in a decrease in the average grain size. This causes in an increase of dye uptake and thereby contributes to enhancement of the photocurrent in the DSSC.
Bibliographical noteFunding Information:
This work was supported in part by KOSEF (Contract No. R01-2004-000-10143-0), and in part by the Research Center for Energy Conversion and Storage (Contract No. R11-2002-102-00000-0).
Copyright 2008 Elsevier B.V., All rights reserved.
- Columnar structure
- Dye-sensitized solar cell
- Radio-frequency magnetron sputtering
- Rutile TiO
- Substrate heating