Higher Efficiency with Quantum Dot Solar Cells

December 28, 2011 · Print This Article

Photovoltaic technology has taken another step forward as researchers at the National Renewable Energy Laboratory (NREL) have demonstrated a photocell with an external quantum efficiency by 100 percent using quantum dots. The new cell uses a process called Multiple Exciton Generation (MEG) that produces more than one electron-hole pair per absorbed photon, and reached a level of 114 percent.

This development offers the possibility of increased efficiency in solar panels,

and the technology is able to be manufactured using high-throughput roll-to-roll manufacturing. With the use of quantum dots, photocells could theoretically see as much as a 35 percent increase in potential conversion efficiency above contemporary cells. The research cell was constructed as a “layered cell

consisting of antireflection-coated glass with a thin layer of a transparent conductor, a nanostructured zinc oxide layer, a quantum dot layer of lead selenide […]

[Source] Cynthia


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