Presentation: Richard King

Raising the Efficiency Ceiling in Multijunction Solar Cells
Photovoltaics research represents one of the greatest opportunities to impact the climate change and energy security problems that we face today. Over 1.5×10^22 J (15,000 EJ) of solar energy reach Earth everyday, compared to a daily energy consumption of approximately 1.3 EJ by human activity. The potential for new 4-, 5-, and 6-junction solar cell architectures, capable of greater than 70% efficiency in theory, to reach practical efficiencies over 50% is highly leveraging for the economics of concentrator photovoltaic (CPV) systems.

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energy efficiency