Hybrid Organic / Inorganic Solar Cells Based On Electrodeposited ZnO Nanowire Arrays on ITO and AZO Cathodes

• Main Author: Wen, Wei-Te
• Other Authors: Ruda, Harry E.
• Language: en_ca
• Published: 2012
• Subjects: ZnO Nanowire Arrays; Hybrid Organic / Inorganic Solar Cells; 0794
• Online Access: http://hdl.handle.net/1807/35519

ZnO nanowire arrays (NWAs) and Al-doped ZnO (AZO) cathodes were applied in hybrid organic / inorganic solar cells for lower-cost solar energy. Parameters for the electrodeposition of ZnO NWAs and the fabrication of NWA-free baseline devices were systematically optimized using ITO as the cathodes. High efficiencies of up to 5.4% were achieved. Incorporation of the ZnO NWAs into the baseline devices significantly reduced their efficiencies due to possible shorting in the active layer. Devices fabricated using AZO cathodes were characterized. The AZO-based devices achieved efficiencies of up to ~4.8%, showing promising results for the application of AZO as an ITO alternative. Formation of numerous large nanoplatelets was observed during the electrodeposition of ZnO NWAs on AZO cathodes. The NWAs grown on AZO cathodes were also non-uniform. Future studies were proposed to address the issues with incorporation of ZnO NWAs in hybrid solar cells and their combination with AZO cathodes.