Shangfeng YangUniversity of Science and Technology of China, China
Dr. Shangfeng Yang received his Ph. D. from Hong Kong University of Science and Technology (HKUST) in 2003. He then joined Leibniz-Institute for Solid State and Materials Research (IFW) Dresden, Germany as an Alexander von Humboldt (AvH) Fellow (2004-2005) and a Guest Scientist (2005-2007). In Dec. 2007 he joined University of Science and Technology of China (USTC) as a full professor of Hefei National Laboratory for Physical Sciences at Microscale & Department of Materials Science and Engineering, and has been appointed as Department Head since Oct. 2014. His current research interests include the synthesis and characterization of novel nanocarbons as well as their applications in organic and perovskite solar cells.
Dr. Yang published over 140 peer-reviewed papers in journals including Chem. Rev., Angew. Chem. Int. Ed., J. Am. Chem. Soc., , Phys. Rev. Lett., which received more than 2100 citations. He was awarded “Hundreds of Talents Programme” of Chinese Academy of Sciences in 2008 and was evaluated as “Excellent” in 2013. He was also a recipient of “Young Faculty Award” of USTC Alumni Foundation (2010) and “the 1st Anhui Provincial Hundreds of Talents” (2011).
Title：Improving the Performance of Polymer Solar Cells via Incorporation of Functionalized Graphene and Analogous 2D Materials
SymposiumB09 Solar Cells
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Abstract
The interfaces between electrodes/photoactive layer play a determinative role on the performance of polymer solar cells (PSCs), improving the contact between electrodes and photoactive layer via interface engineering has been demonstrated to an effective solution to enhance the performance of PSCs. Graphenes have been generally applied as hole extraction layer in PSCs to replace the commonly used poly(3,4-ethylendedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) which is acidic and might damage the ITO electrode owing to its hygroscopicity. Here we applied a new functionalized graphene, which is a graphene-fullerene composite (rGO-pyrene-PCBM), as electron extraction layer (EEL), leading to an efficiency enhancement of ~15% for PSCs based on P3HT:PCBM. Contrarily, the comparative devices incorporating the rGO or pyrene-PCBM component as EEL showed dramatically decreased PCE, indicating the importance of composite formation between rGO and pyrene-PCBM components for its electron extraction property. Besides, we recently incorporated other analogous 2D materials, resulting in dramatic performance improvement as well.
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