NDLI: Quantum Engineering of InAs/GaAs Quantum Dot Based Intermediate Band Solar Cells

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Quantum Engineering of InAs/GaAs Quantum Dot Based Intermediate Band Solar Cells

Content Provider	Semantic Scholar
Author	Beattie, Neil S. See, Patrick Zoppi, Guillaume Ushasree, Palat Duchamp, Martial Farrer, Ian Ritchie, David A. Tomić, Stanko
Copyright Year	2017
Abstract	The efficiency of a solar cell can be substantially increased by opening new energy gaps within the semiconductor band gap. This creates additional optical absorption pathways which can be fully exploited under concentrated sunlight. Here we report a new approach to opening a sizable energy gap in a single junction GaAs solar cell using an array of InAs quantum dots that leads directly to high device open circuit voltage. High resolution imaging of individual quantum dots provides experimentally obtained dimensions to a quantum mechanical model which can be used to design an optimized quantum dot array. This is then implemented by precisely engineering the shape and size of the quantum dots resulting in a total area (active area) efficiency of 18.3% (19.7%) at 5 suns concentration. The work demonstrates that only the inclusion of an appropriately designed quantum dot array in a solar cell has the potential to result in ultrahigh efficiency under concentration.
Starting Page	2745
Ending Page	2750
Page Count	6
File Format	PDF HTM / HTML
DOI	10.1021/acsphotonics.7b00673
Volume Number	4
Alternate Webpage(s)	http://usir.salford.ac.uk/44218/8/acsphotonics.7b00673.pdf
Alternate Webpage(s)	http://eprints.whiterose.ac.uk/125104/1/acsphotonics.7b00673.pdf
Alternate Webpage(s)	http://usir.salford.ac.uk/id/eprint/44218/8/acsphotonics.7b00673.pdf
Alternate Webpage(s)	http://nrl.northumbria.ac.uk/32350/8/acsphotonics.7b00673.pdf
Alternate Webpage(s)	https://doi.org/10.1021/acsphotonics.7b00673
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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