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Embedded nanopillars for solar cell applications – Jingbiao Cui

Date: Mon. September 27th, 2010, 12:30 pm-1:30 pm
Location: Rockefeller 221

Nanopillar radial junctions achieved by embedding nanopillars in absorbing thin films have potential for improved performance in solar cells due to increased junction area and improved charge carrier collection. This type of structure is still in its initial stage of development by using expensive and complicated microfabrication processes. An economic approach to the fabrication of nanopillar p-n junction solar cells has been investigated recently using a simple two-step electrodeposition method. The nanopillar heterojunctions are composed of n-type ZnO nanopillar arrays embedded in p-type Cu2O thin films, showing improved performance as compared with the planar thin film structures. While much effort is needed to optimize the device overall performance, we demonstrate that electrodeposition, which is easily adapted to other chemical systems, is a promising technique for large-scale fabrication of low-cost embedded nanopillar solar cells.

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