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Sunday, October 21, 2018

#393 High-end solar cells

As indicated earlier, silicon serves very well "mass photovoltaics". However, in order to meaningfully increase efficiency of solar cells, multi-junction, compound semiconductors-based cells known as tandem solar cells are being employed.


The goal is to improve the use the solar spectrum by stacking up semiconductors featuring different energy gaps in multi-junction cells arranged such that energy gap width increases from the bottom to the top of the stack. This arrangement assures absorption of the fairly broad range of wavelengths included in the solar spectrum with shortest being absorbed by the top layers and longer penetrating deeper into the stack where they are absorbed by the narrower bandgap materials. The result is high-cost class solar cells, but also the cells featuring the highest efficiencies approaching 50%.

Posted by Jerzy Ruzyllo at 12:34 PM | Semiconductors | Link is the personal blog of Jerzy Ruzyllo. With over 35 years of experience in academic research and teaching in the area of semiconductor engineering (currently holding position of a Distinguished Professor of Electrical Engineering and Professor of Materials Science and Engineering at Penn State University), he has a unique perspective on the developments in this progress driving technical domain and enjoys blogging about it.

With over 2000 terms defined and explained, Semiconductor Glossary is the most complete reference in the field of semiconductors on the market today.

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