High-performance flat-panel solar thermoelectric generators with high thermal concentration.

Nat Mater 2011 May 1;10(7):532-8. Epub 2011 May 1.

Mechanical Engineering Department, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.

The conversion of sunlight into electricity has been dominated by photovoltaic and solar thermal power generation. Photovoltaic cells are deployed widely, mostly as flat panels, whereas solar thermal electricity generation relying on optical concentrators and mechanical heat engines is only seen in large-scale power plants. Here we demonstrate a promising flat-panel solar thermal to electric power conversion technology based on the Seebeck effect and high thermal concentration, thus enabling wider applications. The developed solar thermoelectric generators (STEGs) achieved a peak efficiency of 4.6% under AM1.5G (1 kW m(-2)) conditions. The efficiency is 7-8 times higher than the previously reported best value for a flat-panel STEG, and is enabled by the use of high-performance nanostructured thermoelectric materials and spectrally-selective solar absorbers in an innovative design that exploits high thermal concentration in an evacuated environment. Our work opens up a promising new approach which has the potential to achieve cost-effective conversion of solar energy into electricity.

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http://dx.doi.org/10.1038/nmat3013DOI Listing
May 2011
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References

(Supplied by CrossRef)

A Luque et al.
2003

MA Green et al.
2003

D Mills et al.
Sol. Energy 2004

M Roeb et al.
Science 2010

HJ Goldsmid et al.
1964

DM Rowe et al.
2006

R Venkatasubramanian et al.
Nature 2001

TC Harman et al.
Science 2002

KF Hsu et al.
Science 2004

MS Dresselhaus et al.
Adv. Mater. 2007

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