Sharp Achieves 37.9% Efficiency With Triple-junction Compound Solar Cell

Apr 29, 2013
Mami Akasaka, Tech-On!
The solar cell with a cell conversion efficiency of 37.9% (image courtesy of Sharp)
The solar cell with a cell conversion efficiency of 37.9% (image courtesy of Sharp)
[ If it clicks, the expanded picture will open ]
The wavelength distribution of solar energy and the sensitivity of the triple-junction compound solar cell (image courtesy of Sharp)
The wavelength distribution of solar energy and the sensitivity of the triple-junction compound solar cell (image courtesy of Sharp)
[ If it clicks, the expanded picture will open ]

Sharp Corp realized a cell conversion efficiency of 37.9% with its triple-junction compound solar cell.

Sharp achieved a cell conversion efficiency of 36.9% with a solar cell having a similar structure in November 2011 (See related article). This time, it increased the efficiency by 1% and broke its own world record.

Sharp makes triple-junction compound solar cells by efficiently stacking three layers and using InGaAs (indium gallium arsenide) for the bottom layer. This time, the company made improvements to the composition ratio of In, Ga and As, which compose the bottom layer, so that light is more efficiently absorbed in accordance with the wavelength of sunlight.

Sharp plans to apply the latest research results to concentrating photovoltaic systems, which convert solar light collected by a lens into electricity, space satellites, vehicles, etc.