Hot Paper in Chemistry

January 2015
“Long-range balanced electron- and hole-transport lengths in organic-inorganic CH3H3Pbl3,” by Guichuan Xing, et al., Science, 342(6156): 344-7, 18 October 2013.

[Authors' affiliations: Nanyang Technological University, Singapore; Singapore-Berkeley Research Initiative for Sustainable Energy, Singapore; Institute of Materials for Electronic Engineering II, Aachen, Germany; Swiss Federal Institute of Technology, Lausanne]

Abstract: “Low-temperature solution-processed photovoltaics suffer from low efficiencies because of poor exciton or electron-hole diffusion lengths (typically about 10 nanometers). Recent reports of highly efficient CH3NH3PbI3-based solar cells in a broad range of configurations raise a compelling case for understanding the fundamental photophysical mechanisms in these materials. By applying femtosecond transient optical spectroscopy to bilayers that interface this perovskite with either selective-electron or selective-hole extraction materials, we have uncovered concrete evidence of balanced long-range electron-hole diffusion lengths of at least 100 nanometers in solution-processed CH3NH3PbI3. The high photoconversion efficiencies of these systems stem from the comparable optical absorption length and charge-carrier diffusion lengths, transcending the traditional constraints of solution-processed semiconductors.”

This 2013 paper from Science was cited 34 times in current journal articles indexed by Thomson Reuters during July-August 2014. During that two-month period, only two papers published in the last two years and categorized by ScienceWatch in the main field of Chemistry (including Materials Science) collected higher numbers of citations. Prior to the most recent count, citations to the paper have accrued as follows, as tracked by Essential Science Indicators Hot Papers:

May-June 2014: 27 citations
March-April 2014: 23
January-February 2014: 39
November-December 2013: 2
September-October 2013: 1

Total citations to date: 126

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.