Please refer to the links below:
High-Efficiency, Self-Concentrating Nanoscale Solar Cell, IB-2338
Ideal Configuration for Nanoscale Solar Cells, IB-2364
Controlled Structure of Organic-Nanomaterial Solar Cells, IB-2365
Alex Zettl, Jeffrey Grossman, and colleagues at Berkeley Lab have developed several approaches for improving the conversion efficiency of nanoscale photovoltaic devices. All of the technologies are available for licensing.