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Open structure ZnO/CdSe core/shell nanoneedle arrays for solar cells
Nanoscale Research Letters
  • Yanxue Chen
  • Lin Wei
  • Guanghua Zhang
  • Jun Jiao, Portland State University
Document Type
Publication Date
  • Photovoltaic cells -- Materials -- Research,
  • Zinc oxide -- Electric properties,
  • Semiconductor films,
  • Cadmium selenide

Open structure ZnO/CdSe core/shell nanoneedle arrays were prepared on a conducting glass (SnO2:F) substrate by solution deposition and electrochemical techniques. A uniform CdSe shell layer with a grain size of approximately several tens of nanometers was formed on the surface of ZnO nanoneedle cores after annealing at 400°C for 1.5 h. Fabricated solar cells based on these nanostructures exhibited a high short-circuit current density of about 10.5 mA/cm2 and an overall power conversion efficiency of 1.07% with solar illumination of 100 mW/cm2. Incident photo-to-current conversion efficiencies higher than 75% were also obtained.


© 2012 Chen et al.; licensee Springer. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Chen et al.: Open structure ZnO/CdSe core/shell nanoneedle arrays for solar cells