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

H. Abdullah, Noor Aishah Atiqah, A. Omar, Izamarlina Asshaari, Savisha Mahalingam, Zikri Razali, Sahbudin Shaari, J. S. Mandeep, Halina Misran

Research output: Contribution to journalArticle

17 Citations (Scopus)

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, η, 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 η = 2.36, 0.78 and 0.38 %, respectively. EIS analysis estimated the effective electron lifetime, τeff, effective electron chemical diffusion coefficient, Deff, effective electron diffusion length of the photoanode, Ln, charge transport resistance, Rct and transport resistance, Rt.

Original languageEnglish
Pages (from-to)2263-2270
Number of pages8
JournalJournal of Materials Science: Materials in Electronics
Volume26
Issue number4
DOIs
Publication statusPublished - 01 Jan 2015

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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