Improving the efficiency of dye sensitized solar cells by TiO2-graphene nanocomposite photoanode
| Author | Mehmood U. |
| Author | Ahmed S. |
| Author | Hussein I.A. |
| Author | Harrabi K. |
| Available date | 2022-04-25T10:59:49Z |
| Publication Date | 2015 |
| Publication Name | Photonics and Nanostructures - Fundamentals and Applications |
| Resource | Scopus |
| Identifier | http://dx.doi.org/10.1016/j.photonics.2015.08.003 |
| Abstract | Nanocomposite photoanodes were prepared by addition of graphene (GR) micro-platelets to TiO2 nanoparticulate paste. TiO2/graphene based DSSCs were fabricated using Z907 photosensitizer. Transmission electron microscope was used to confirm the presence of graphene in composite films after heating at 450 �C for 30 min. UV-visible absorption spectroscopy, photocurrent-voltage characteristics and electrochemical impedance spectroscopic measurements were conducted to characterize the DSSCs. The results show that the photo conversion efficiency is highly dependent on the concentration of graphene in the photoanode. Under an optimal conditions, solar cell based on graphene/TiO2 shows power conversion efficiency (PCE) of 4.03%, which is about 26% greater than the cell based on pristine TiO2 electrode (3.20%). A density functional theory was used to compute the band gap of TiO2 and graphene-TiO2 nano clusters. |
| Sponsor | The authors would like to acknowledge the support provided by King Abdulaziz City for Science and Technology (KACST) through the Science & Technology Unit at King Fahd University of Petroleum & Minerals (KFUPM) for funding this work through project no. 11-ENE1635-04 as part of the National Science, Technology and Innovation Plan. KFUPM is also acknowledged for supporting this research. The authors would like to acknowledge the Center of Research Excellence for Renewable Energy at KFUPM. |
| Language | en |
| Publisher | Elsevier B.V. |
| Subject | Absorption spectroscopy Composite films Conversion efficiency Density functional theory Dye-sensitized solar cells Efficiency Electrochemical impedance spectroscopy Energy gap Nanoclusters Nanocomposites Photosensitizers Solar cells Titanium dioxide Transmission electron microscopy Electrochemical impedance Graphene nanocomposites Photo-anodes Power conversion efficiencies Spectroscopic measurements Titania UV-visible absorption spectroscopy Voltage characteristics Graphene |
| Type | Article |
| Pagination | 34-42 |
| Volume Number | 16 |
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