Sci-Bytes> Hot Paper in Physics
Week of October 24, 2010
"Bulk heterojunction solar cells with internal quantum efficiency approaching 100%," by Sung Heum Park and 9 others, Nature Photonics, 3(5): 297-302, May 2009.
[Authors' affiliations: University of California, Santa Barbara; Gwangju Institute of Science and Technology, South Korea; University of Laval, Quebec City, Quebec, Canada]
Abstract: "We report the fabrication and measurement of
solar cells with 6% power conversion efficiency using the alternating
co-polymer, poly[N-9
''-hepta-decanyl-2,7-carbazole-alt-5,5-(4',7'-di-2-thienyl-2',1',3'-benzothiadiazole)
(PCDTBT) in bulk heterojunction composites with the fullerene derivative
[6,6]-phenyl C-70-butyric acid methyl ester (PC70BM). The PCDTBT/PC70BM
solar cells exhibit the best performance of any bulk heterojunction system
studied to date, with J(SC) = 10.6 mA cm(-2), V-OC = 0.88 V, FF = 0.66 and
eta(e) = 6.1% under air mass 1.5 global (AM 1.5 G) irradiation of 100 mW
cm(-2). The internal quantum efficiency is close to 100%, implying that
essentially every absorbed photon results in a separated pair of charge
carriers and that all photogenerated carriers are collected at the
electrodes."
This 2009 report from Nature Photonics was cited 59
times in current journal articles indexed by Clarivate
during May-June 2010. Thanks to its latest two-month tally, the report
currently stands as the third-most-cited paper, aside from reviews, indexed
under the heading of physics in the last two years. Prior to the most
recent bimonthly count, citations to the paper have accrued as
follows:
March-April 2010: 75 citations
January-February 2010: 34
November-December 2009: 36
September-October 2009: 19
July-August 2009: 8
May-June 2009: 1
Total citations to date: 232
SOURCE: Hot Papers Database (Included with a subscription to the print newsletter Science Watch®, available from the Research Services Group of Thomson Reuters. Packaged on a CD that is mailed with each Science Watch issue, the Hot Papers Database contains data on hundreds of highly cited papers published during the last two years. User interface permits searching by author, organization, journal, field, and more. Total citations, as well as citations accrued during successive bimonthly periods, can be assessed and graphed. An updated CD containing the most recent bimonthly data is mailed with every new issue of Science Watch, six times a year. The CD also includes an electronic version of the Science Watch issue in HTML format, for personal desktop access.
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