Titania Nanotubes Prepared by Synthesis Method for Dye Sensitized Electrochemical Solar Cells

Citation:
Simiyu J, Mwabora JM, Aduda BO, Lindquist S-E, Hagfeldt A, Boschloo G. "Titania Nanotubes Prepared by Synthesis Method for Dye Sensitized Electrochemical Solar Cells.". In: Presented at the International Conference on Microstructures and Nanotechnologies (ICMNT2006). Tizi-Ouzou, Algeria; 2006.

Date Presented:

9-23 Nov

Abstract:

The area of nanostructured materials for dye sensitized solar cells has gained great interest by scientists, especially after a breakthrough by Gratzel and coworkers in developing a solar cell from nanostructured oxide of titania gaining an overall efficiency of about 11%. Since then research has been going on with emphasis on improvement on this achievement.

TiO2 nanofibres measuring average length 500nm and diameter 10nm have been prepared by synthesis method using 10M NaOH and dispersed in alcohol. Thin films prepared from the nanofibres had thickness varying from 4.5 – 5.5μm. The films were used to fabricate complete dye sensitised solar cells with Ruthenium complex dye as sentizer. I-V characteristics yielded Voc and Isc of 0.41V – 0.58V and 0.18mA – to 1.1mA respectively under standard illumination of 100mW/cm2 (using a halogen lamp and data acquired using Keithley 2400 Source Metre® controlled by LabVIEW® software). XRD analysis indicated strong anatase peaks with crystal orientation in the direction (101). This showed that there was no lose of crystalline structure of the TiO2 during the synthesis process. However, as the sintering temperature was raised, the percentage crystal content of anatase reduced as the rutile structure slowly formed.

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