Hot Paper in Physics

September 2014
“Enhanced power-conversion efficiency in polymer solar cells using an inverted device structure,” by Zhicai He, et al., Nature Photonics, 6(9): 591-5, September 2012.

Abstract: “Polymer-fullerene bulk heterojunction solar cells (PSCs) are currently attracting a great deal of attention and gaining increasing importance, having already shown great promise as renewable, lightweight and low-cost energy sources. Recently, the power-conversion efficiency of state-of-the-art PSCs has exceeded 8% in the scientific literature. However, to find viable applications for this emerging photovoltaic technology, further enhancements in the efficiency towards 10% (the threshold for commercial applications) are urgently required. Here, we demonstrate highly efficient PSCs with a certified efficiency of 9.2% using an inverted structure, which simultaneously offers ohmic contact for photogenerated charge-carrier collection and allows optimum photon harvest in the device. Because of the ease of use and drastic boost in efficiency provided by this device structure, this discovery could find use in fully exploiting the potential of various material systems, and also open up new opportunities to improve PSCs with a view to achieving an efficiency of 10%.”

This 2012 report from Nature Photonics was cited 84 times in current journal articles indexed by Thomson Reuters during March-April 2014. With this latest two-month tally, the report currently stands as the third-most-cited physics paper published in the last two years, aside from reviews. Prior to the most recent bimonthly count, citations to the report have accrued as follows, as tracked by InCites/Essential Science Indicators Hot Papers:

January-February 2014: 136 citations
November-December 2013: 85
September-October 2013: 68
July-August 2013: 60
May-June 2013: 61
March-April 2013: 33
January-February 2013: 103
November-December 2012: 12

Total citations to date: 642

SOURCE: Thomson Reuters Web of Science

The data and citation records included in this report are from Thomson Reuters Web of ScienceTM. Web of ScienceTM is a registered trademark of Thomson Reuters. All rights reserved.