Chemistry – An Asian Journal

Cover image for Vol. 9 Issue 4

Editor: Theresa Kueckmann

Impact Factor: 4.572

ISI Journal Citation Reports © Ranking: 2012: 28/152 (Chemistry Multidisciplinary)

Online ISSN: 1861-471X

Associated Title(s): Angewandte Chemie International Edition, Asian Journal of Organic Chemistry, Chemistry - A European Journal, Chinese Journal of Chemistry, Journal of the Chinese Chemical Society, The Chemical Record

9_04/2014Cover Picture: Extended Conjugated Donor–Acceptor Molecules with E-(1,2-Difluorovinyl) and Diketopyrrolopyrrole (DPP) Moieties toward High-Performance Ambipolar Organic Semiconductors (Chem. Asian J. 4/2014)

Ambipolar organic semiconductors that can conduct both hole and electron carriers have received increasing attention in recent years. In their Full Paper on page 1068 ff., Deqing Zhang and co-workers report two conjugated molecules containing E-(1,2-difluorovinyl) and diketopyrrolopyrrole (DPP) moieties. One of them, DPP-2F, displays an ambipolar semiconducting behavior with hole and electron mobilities reaching 0.42 and 0.80 cm2 V−1 s−1, respectively. The present study clearly demonstrates that (E)-2-(1,2-difluorovinyl) is a useful electron-withdrawing block to tune frontier orbital energies and extend conjugation.

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9_04i/2014Inside Cover: Thieno[3,4-c]pyrrole-4,6-dione-Based Small Molecules for Highly Efficient Solution-Processed Organic Solar Cells (Chem. Asian J. 4/2014)

Solar Cells Small-molecule organic solar cells (SMOSCs) have recently gained attention as sources of renewable energy owing to their advantages such as easier synthesis, less batch-to-batch variation, and better reproducibility with regard to performance as compared to polymer-based solar cells. In their Full Paper on page 1045 ff., highlighted on the Inside Cover, Yun-Hi Kim et al. designed and synthesized two small molecules bearing a thieno[3,4-c]pyrrole-4,6-dione (TPD) unit. These compounds show an excellent thermal stability, strong absorption, relatively low HOMO levels, and high hole mobility. SMOSCs based on blends of these donor molecules and a phenyl-C61-butyric acid methyl ester acceptor display power conversion efficiencies as high as 4.6 %.

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