Hot Paper in Chemistry

October 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 2012 report from Nature Communications was cited 64 times in current journal articles indexed by Thomson Reuters during May-June 2014. During that two-month period, no other paper categorized by ScienceWatch under the main heading of Chemistry (while also drawing citations from Materials Science and Physics) garnered a higher number of citations. Prior to the most recent bimonthly count, citations to the report have accrued as follows, as tracked by Essential Science Indicators Hot Papers:

March-April 2014: 57 citations
January-February 2014: 114
November-December 2013: 52
September-October 2013: 34
July-August 2013: 24
May-June 2013: 13
March-April 2013: 4
January-February 2013: 27

Total citations to date: 389



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.