Publication:
Structural, morphological, electrical and electron transport studies in ZnO�rGO (wt%�=�0.01, 0.05 and 0.1) based dye-sensitized solar cell

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Date
2015
Authors
Abdullah H.
Atiqah N.A.
Omar A.
Asshaari I.
Mahalingam S.
Razali Z.
Shaari S.
Mandeep J.S.
Misran H.
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Springer Science and Business Media, LLC
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Abstract
Zinc oxide�reduced graphene oxide (ZnO�rGO) thin films were fabricated on a fluorine-doped tin oxide glass substrate by a chemical bath deposition method. The thin films were immersed in the Eosin Y dye for 24 and 48�h to be fabricated as a dye-sensitized solar cell. ZnO hexagonal wurtzite structures were analyzed by X-ray diffraction analysis. Field effect scanning electron microscope showed the images of ZnO nanoparticles and nanobranches. The atomic force microscopy analysis estimated the average roughness of ZnO�rGO films doped with 0.01, 0.05 and 0.1�wt% which varied from 178 to 267�nm. The electrical or photovoltaic performance of ZnO�rGO were measured and compared accordingly by considering their power conversion efficiency, ?, photocurrent density, Jsc, open-circuit voltage, Voc and fill factor, FF. The cell�s efficiency of ZnO with 0.01�wt% rGO, 0.05�wt% rGO and 0.1�wt% rGO reached ?�=�2.36, 0.78 and 0.38�%, respectively. EIS analysis estimated the effective electron lifetime, ?eff, effective electron chemical diffusion coefficient, Deff, effective electron diffusion length of the photoanode, Ln, charge transport resistance, Rct and transport resistance, Rt. � 2015, Springer Science+Business Media New York.
Description
Atomic force microscopy; Chemical analysis; Deposition; Efficiency; Electron transport properties; Graphene; II-VI semiconductors; Open circuit voltage; Oxide films; Oxide minerals; Reduced Graphene Oxide; Scanning electron microscopy; Substrates; Thin films; Tin oxides; X ray powder diffraction; Zinc oxide; Zinc sulfide; ZnO nanoparticles; Chemical bath deposition methods; Chemical diffusion coefficients; Fluorine doped tin oxide; Hexagonal wurtzite structure; Photocurrent density; Photovoltaic performance; Power conversion efficiencies; Transport resistance; Dye-sensitized solar cells
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