Improved photoelectrode of dye-sensitized solar cell using a ZnO/Zn 2TiO4

• Main Authors: Koonnasoot W., Gardchareon A., Choopun S., Wongratanaphisan D.
• Format: Conference or Workshop Item
• Language: English
• Published: 2014
• Online Access: http://www.scopus.com/inward/record.url?eid=2-s2.0-80053229638&partnerID=40&md5=610c1981bd4efb154ebf5ef4d47346bd; http://cmuir.cmu.ac.th/handle/6653943832/6448
• Institution: Chiang Mai University

Zinc titanate nanostructures were prepared by oxidation reaction technique. Here Zn mixed with 0, 10, 20 and 30 mol% of TiO2 powder was screened on alumina and FTO substrate, and then sintered at 400-600°C for 12 h under normal atmosphere. Through a detailed field emission scanning electron microscopy (FE-SEM), energy dispersive spectroscopy (EDS), and x-ray diffraction (XRD) indicated that the nanostructures exhibited belt-like shapes of Zn 2TiO4 phase. Moreover, the belt-like nanostructures of the synthesized Zn2TiO4 were studied in terms of optical properties by the UV-vis spectroscopy (UV-vis) to obtain band gap energy (E g). The results showed that the Eg gap energy ranged from 3.57 eV to 3.63 eV as the mol% of TiO2 increased. In addition to the characterization of the nanobelts, the synthesized Zn2TiO4 nanostructures were applied as a bilayer semiconductor electrode in ZnO-based dye-sensitized solar cell (DSSC). It was shown that the use of Zn 2TiO4 nanostructure with 10 mol% TiO2 in the ZnO/Zn2TiO4 electrode components of the DSSC revealed the highest obtainable efficiency. © (2011) Trans Tech Publications.