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A Rapid synthesis of vertically aligned taper-like k-doped zno nanostructures to enhance dye-sensitized solar cell efficiency

Sharifi Miavaghi, A ; Sharif University of Technology | 2019

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  1. Type of Document: Article
  2. DOI: 10.1007/s11837-019-03813-0
  3. Publisher: Springer , 2019
  4. Abstract:
  5. Large-scale K-doped ZnO nanotapers were successfully grown on an indium tin oxide (ITO) substrate using a facile electrochemical route. The structural and morphologic analysis exhibited that the K-doped ZnO nanostructures had a nanotaper morphology and strong preferential [0001] c-axis direction with a hexagonal polycrystalline structure. The optical results show that the incorporation of K+ ions as the donors in a ZnO lattice leads to substantial modulation of the band gap structure of ZnO nanotapers, which results in a redshift in the ultraviolet emission peaks. The considerable enhancement of performance in K-doped ZnO-based dye-sensitized solar cells (DSSCs) can be related to the doping structure, which leads to higher dye loading (3.34 × 10−8 mol/cm2). The good photovoltaic behavior of the K-doped ZnO nanotapers can be attributed to the higher surface-to-volume ratio and large K-doped ZnO nanotaper/ITO interfacial band bending, indicating the potential of a low-temperature aqueous electrochemical approach to synthesizing doped ZnO nanotapers for DSSCs. © 2019, The Minerals, Metals & Materials Society
  6. Keywords:
  7. Energy gap ; II-VI semiconductors ; Indium compounds ; Morphology ; Nanostructures ; Optical lattices ; Photovoltaic effects ; Temperature ; Tin oxides ; Zinc oxide ; Dye-sensitized solar cell efficiencies ; Electrochemical routes ; Indium tin oxide substrates ; Morphologic analysis ; Polycrystalline structure ; Surface-to-volume ratio ; Ultraviolet emission ; Vertically aligned ; Dye-sensitized solar cells
  8. Source: JOM ; Volume 71, Issue 12 , 2019 , Pages 4850-4856 ; 10474838 (ISSN)
  9. URL: https://link.springer.com/article/10.1007/s11837-019-03813-0