TITLE

Hot electron effect in nanoscopically thin photovoltaic junctions

AUTHOR(S)
Kempa, K.; Naughton, M. J.; Ren, Z. F.; Herczynski, A.; Kirkpatrick, T.; Rybczynski, J.; Gao, Y.
PUB. DATE
December 2009
SOURCE
Applied Physics Letters;12/7/2009, Vol. 95 Issue 23, p233121
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The open circuit voltage in ultrathin amorphous silicon solar cells is found to increase with light energy (frequency), due to extraction of hot electrons. The ultrathin nature of these junctions also leads to large internal electric fields, yielding reduced recombination and increased current. A simple phenomenological argument provides a qualitative understanding of these effects and gives guidelines for designing future, high-efficiency, hot electron solar cells.
ACCESSION #
46708315

 

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