Zinc oxide nanowires (ZnO NWs) made by potentiostatic electrodeposition (ED) inside both anodic alumina membranes (AAM) and polycarbonate membranes have seen widely reported. ^1-2 Unlike to metallic NWs, here it’s not possible to see clearly the growing behaviour in current-time transients (i.e. NWs growing out the pore mouth) probably due to resistive nature of semiconducting materials. Our goal is to adress these aspects by means of in situ method and then to optimize the growth of ZnO NWs. For metallic reference, we employed electrochemical parameters obtained for zinc nanowires (Zn NWs) which also is an interesting indirect way to form ZnO NWs after post-treatment.³

AAM were prepared by anodization in Oxalic Acid. Zn NWs were grown in order to determine the critical time to fill the AAM pores with Zn NWs completely. We compare these results with those obtained in ZnO NWs growth and the electrical charge calculated for both Zn and ZnO NWs. Different electrochemical techniques allowed us to determine critical parameters in order to understand the growth mechanism: By Potentiodinamic measurements we found different current behaviour at different nanowires lengths and conventional Impedance together with Mott Schottky measurements allowed to get information about the charge transfer resistance and characterize the semiconducting properties. The current-time transients gave information about diffusive behaviour of electroactives species in each case. We will discuss the effect of key parameters like applied potential and pore lenght in correlation with ex situ characterization (Field emission scanning electronic microscopy with X-Ray microanalysis and X-Ray Difraction)

References

1. M.J. Zheng, L.D. Zhang, G.H. Li, W.Z. Shen; Chem. Phys. Lett. 363 (2002) 123–128. (68-02)
2. Y. Leprince-Wang, A. Yacoubi-Ouslim and G.Y. Wang; Microelectronics Journal 36 (2005) 625–628. (290-81)
3. J. Wang, M. Tian, N. Kumar and T. E. Mallouk; Nano Lett. 5 (2005) 1247.

• Legal notice:
  

  Copyright (c) Pielaszek Research, all rights reserved.
  The above materials, including auxiliary resources, are subject to Publisher's copyright and the Author(s) intellectual rights. Without limiting Author(s) rights under respective Copyright Transfer Agreement, no part of the above documents may be reproduced without the express written permission of Pielaszek Research, the Publisher. Express permission from the Author(s) is required to use the above materials for academic purposes, such as lectures or scientific presentations.
  In every case, proper references including Author(s) name(s) and URL of this webpage: https://science24.com/paper/11039 must be provided.

1. Electrodeposed CuIn(S,Se)₂ based solar cells: electrical properties
2. Electrodeposition of ZnTe nanowires into porous anodic alumina membranes
3. New insights in the electrodeposition mechanism of CuInSe2 thin films for solar cells applications
4. Electrochemical synthesis of ZnO in the presence of Dye or polymer additives.
5. Electrowetting study of redox Self assembled layers on ZnO nanostructures prepared by electrodeposition
6. Study of CIS based solar cells with a ALCVD ZnO/ZnO:Al as window layers
7. Zinc oxide nanostructured layers by spray of zinc acetate solutions
8. Electrodeposition of Porous Crystalline ZnO/Dye Hybrid Thin Films and Development of Plastic Solar Cells
9. Mechanistic Study of ZnO Nanowires Electrodeposition
10. Zn(S,O,OH) Chemical Bath Deposited buffer layers for high efficiencies Cu(In,Ga)(S,Se)₂ solar cells : a better understanding of the growth mechanism
11. Electrodeposition of Polyphasic [(ZnO)_a(ZnO₂)_b(ZnS)_c] Thin Films in DMSO Solution. Study of Their Morphological, Optic and Crystalline Porperties.
12. Electrochemical Synthesis of Macroporous Zinc Oxide by Employing Hydrogen Peroxide like Oxygen Precursor