TITLE

Photovoltaic efficiency enhancement through thermal up-conversion

AUTHOR(S)
Ekins-Daukes, N. J.; Ballard, I.; Calder, C. D. J.; Barnham, K. W. J.; Hill, G.; Roberts, J. S.
PUB. DATE
March 2003
SOURCE
Applied Physics Letters;3/24/2003, Vol. 82 Issue 12, p1974
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Anti-Stokes emission is observed experimentally from a series of quantum well p-i-n structures and is attributed to a quasithermal equilibrium being established between the quantum well and barrier material. A device is described whereby the anti-Stokes emission from a quantum well p-i-n structure can be used to increase the short-circuit current of a second conventional solar cell, essentially coupling sub-band-gap sunlight to the ambient thermal reservoir. For a GaAs p/n cell at 300 K, this effect is calculated to raise the one-sun power conversion efficiency from 30.0% to 31.3%. Greater efficiency increases are possible if a thermal gradient is established across the structure.
ACCESSION #
9319856

 

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