Publication: Structural, morphological, electrical and electron transport studies in ZnO�rGO (wt%�=�0.01, 0.05 and 0.1) based dye-sensitized solar cell
Date
2015
Authors
Abdullah H.
Atiqah N.A.
Omar A.
Asshaari I.
Mahalingam S.
Razali Z.
Shaari S.
Mandeep J.S.
Misran H.
Journal Title
Journal ISSN
Volume Title
Publisher
Springer Science and Business Media, LLC
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