Few-layered graphene decked with TiO nano particles by ultrasonic assisted synthesis and its dye-sensitized solar cell application.

Autor: Bykkam, Satish, Rao, K., Naresh kumar, R., Shilpa Chakra, Ch., Dayakar, T.
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Zdroj: Journal of Materials Science: Materials in Electronics; Dec2016, Vol. 27 Issue 12, p12574-12581, 8p
Abstrakt: Few-layered graphene (FLG, 1.0, 2.0 and 3.0 wt%)/titania (TiO) nanocomposites were prepared by ultrasonic assisted synthesis. The phase and compositional analysis of FLG/TiO nanocomposites were performed with X-ray diffraction and Raman spectroscopy, optical properties carried out by UV-Vis diffuse reflectance spectra and functional groups identified by Fourier transform infrared spectroscopy. Surface morphologies were characterized by field emission scanning electron microscopy and high -resolution transmission electron microscopy. The prepared FLG/TiO nanocomposites were used as working electrodes to form thin films deposited onto fluorine doped tin oxide through a doctor blade technique. The assembled solar cell, current density-voltage characteristics were measured with N719 dye under AM 1.5G, 100 m W/m of the solar simulator. The efforts showed that the optimized η was observed to be 6.70 % in appropriate with FLG (1.0 wt%)/TiO working electrode, compared to the TiO working electrode. However, by increasing wt% of FLG the η was decreased due to the surface interaction of FLG with TiO NPs. The results revealed that the FLG (1.0 wt%)/TiO working electrode has increased the electron charge transport rate which further leads to enhanced η of DSSC. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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