Hot Paper in Chemistry

May 2014
“A polymer tandem solar cell with 10.6% power conversion efficiency,” by Jingbi You, et al., Nature Communications, 4, No. 1446, February 2013.

Abstract: “An effective way to improve polymer solar cell efficiency is to use a tandem structure, as a broader part of the spectrum of solar radiation is used and the thermalization loss of photon energy is minimized. In the past, the lack of high-performance low-bandgap polymers was the major limiting factor for achieving high-performance tandem solar cell. Here we report the development of a high-performance low bandgap polymer (bandgap <1.4 eV), poly[2,7-(5,5-bis-(3,7-dimethyloctyl)-5H-dithieno[3,2-b:2',3'-d]pyran)-alt-4,7-(5,6-difluoro-2,1,3-benzothia diazole)] with a bandgap of 1.38 eV, high mobility, deep highest occupied molecular orbital. As a result, a single-junction device shows high external quantum efficiency of >60% and spectral response that extends to 900 nm, with a power conversion efficiency of 7.9%. The polymer enables a solution processed tandem solar cell with certified 10.6% power conversion efficiency under standard reporting conditions (25 degrees C, 1,000 Wm(-2), IEC 60904-3 global), which is the first certified polymer solar cell efficiency over 10%.”

This 2013 report from Nature Communications was cited 34 times in current journal articles indexed by Thomson Reuters during November/December 2013. Only one other paper indexed under the main heading of Chemistry during the previous two years, aside from reviews, attracted a higher number of citations during that two-month period. In fact, this paper proved to be one of the most-cited reports published in 2013, based on citations tallied at year’s end. Prior to the most recent bimonthly count, citations to the report have accrued as follows, as tracked by Essential Science Indicators Hot Papers:

September-October 2013: 26 citations
July-August 2013: 20
May-June 2013: 13
March-April 2013: 4
January-February 2013: 27

Total citations to date: 124

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.