"Efficiency enhancement in low-bandgap polymer
solar cells by processing with alkane
dithiols," by J. Peet and 6 others, Nature Materials,
6(7): 497-500, July 2007.
[Authors' affiliation: University of California, Santa Barbara]
Abstract: "High charge-separation efficiency combined with
the reduced fabrication costs associated with solution processing and the
potential for implementation on flexible substrates make 'plastic' solar
cells a compelling option for tomorrow's photovoltaics. Attempts to control
the donor/acceptor morphology in bulk heterojunction materials as required
for achieving high power-conversion efficiency have, however, met with
limited success. By incorporating a few volume per cent of alkanedithiols
in the solution used to spin-cast films omprising a low-bandgap
polymer and a fullerene derivative, the power-conversion efficiency of
photovoltaic cells (air-mass 1.5 global conditions) is increased from 2.8%
to 5.5% through altering the bulk heterojunction morphology. This discovery
can potentially enable morphological control in bulk heterojunction
materials where thermal annealing is either undesirable or ineffective."
This 2007 report from Nature Materials was cited 27
times in current journal articles indexed by Thomson Reuters
during July-August 2008. Only one other non-review paper in the main field
of chemistry attracted a greater number of citations during that two-month
period. (Given its interdisciplinary nature, this materials-science paper
could also have been assigned to the main physics list.) Prior to the most
recent bimonthly count, citations to the paper have accrued as follows:
May-June 2008: 9 citations
March-April 2008: 7
January-February 2008: 8
November-December 2007: 7
September-October 2007: 1
Total citations to date: 59
SOURCE:
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