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One-pot synthesis of ZnO nanoparticles and submicron-aggregates for dye-sensitized solar cells

Rostami, P ; Sharif University of Technology | 2015

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  1. Type of Document: Article
  2. DOI: 10.1016/j.matlet.2014.10.134
  3. Publisher: Elsevier , 2015
  4. Abstract:
  5. ZnO nanoparticles (NPs) and submicron aggregates (SMAs) were synthesized via a simple precipitation method by changing the amount of zinc acetate di-hydrate in absolute ethanol and synthesis time. Synthesized NPs and SMAs were characterized by FE-SEM, EDS, XRD, PL, and DRS and were used to fabricate dye-sensitized solar cells (DSSCs). The SMAs synthesized at moderate concentration (0.022 M) and with poly-dispersed distribution of the aggregates showed lower density of deep localized trap states as well as enhanced scattering features in comparison to NP-based electrode. As a result, power conversion efficiency (η) of about 2.56% with improved current density (Jsc) of 8.51 mA/cm2 were achieved under AM 1.5, which were considerably higher than those of mono-dispersed distribution of SMAs and NPs photoelectrodes
  6. Keywords:
  7. FE-SEM ; Aggregates ; Dye-sensitized solar cells ; Hydrates ; Metal nanoparticles ; Nanoparticles ; Precipitation (chemical) ; Synthesis (chemical) ; Zinc ; Zinc compounds ; Zinc oxide ; Enhanced scattering ; Moderate concentration ; One-pot synthesis ; Photo-electrodes ; Power conversion efficiencies ; Precipitation methods ; XRD ; ZnO nanoparticles ; Solar cells
  8. Source: Materials Letters ; Volume 139 , January , 2015 , Pages 433-436 ; 0167577X (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S0167577X1401934X