Sharp achieves solar cell efficiency record of 43.5%

Sharp Corp. announced it has achieved the world's highest solar cell conversion efficiency of 43.5 per cent using a concentrator triple-junction compound solar cell.

Sharp said the basic structure of this latest triple-junction compound solar cell uses the company's technology that enables efficient stacking of the threephoto-absorption layers, with InGaAs (indium gallium arsenide) as the bottom layer.

These solar cells are used in a lens-based concentrator system that focuses sunlight on the cells to generate electricity.

Sharp successfully capitalized on the ability of this cell to efficiently convert sunlight collected via three photo-absorption layers into electricity, and also optimised the spacing between electrodes on the surface of the concentrator cell and minimised the cell's electrical resistance, the company said.

The measurement of the world's highest concentrating conversion efficiency (43.5 per cent) was confirmed at the Fraunhofer Institute for Solar Energy Systems in Germany.

Compound solar cells have been used primarily on space satellites due to their high conversion efficiency. However, the company aims to apply this latest development success into concentrator photovoltaic power systems that can generate electricity using small-surface-area solar cells and make them practical for terrestrial use.Sharp achieves solar cell efficiency record of 43.5%

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