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AuthorMehmood U.
AuthorAhmed S.
AuthorHussein I.A.
AuthorHarrabi K.
Available date2022-04-25T10:59:49Z
Publication Date2015
Publication NamePhotonics and Nanostructures - Fundamentals and Applications
ResourceScopus
Identifierhttp://dx.doi.org/10.1016/j.photonics.2015.08.003
URIhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-84942239894&doi=10.1016%2fj.photonics.2015.08.003&partnerID=40&md5=19fa7811cfe8d77f3237da159cd38778
URIhttp://hdl.handle.net/10576/30429
AbstractNanocomposite 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.
SponsorThe 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.
Languageen
PublisherElsevier B.V.
SubjectAbsorption 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
TitleImproving the efficiency of dye sensitized solar cells by TiO2-graphene nanocomposite photoanode
TypeArticle
Pagination34-42
Volume Number16
dc.accessType Abstract Only


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