This work is supported by the State Key Research Development Program of China (2010CB833103), the National Natural Science Foundation of China (60976073), the National Found for Fostering Talents of Basic Science (J1103212), and the Foundation for Outstanding Young Scientist in Shandong Province (BS2010CL036). Jun Jiao thanks the financial support from the Oregon Nanoscience Microtechnologies Institute (ONAMI) and the National Science Foundation.
Nanoscale Research Letters
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.
Chen et al.: Open structure ZnO/CdSe core/shell nanoneedle arrays for solar cells