High-Performance Organic Thin-Film Transistors
01/27/2010By means of molecular and crystal engineering Frank Würthner and co-workers obtained high-performance organic thin-film transistors (TFTs) based on a highly electron-poor octachloroperylene diimide.
The results obtained by scientists from Würzburg and their partners from Stanford University and BASF SE also fascinated the editor of the well-known journal Angewandte Chemie and it has therefore been selected for the cover page of the issue of Januar, 18.Perchlorination of perylene diimide afforded an exceptionally electron-poor organic semiconductor molecule that crystallizes in an ideal brickstone arrangement with close 
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- and chlorine-chlorine contacts. Vapor-deposited thin films of this molecule show excellent transistor performance, even in air. The intriguing supramolecular crystal engineering concept directs two-dimensional percolation paths for electron transport and affords TFTs with excellent mobilities and on-to-off current ratios under atmospheric conditions.
Correspondence to:
Prof. Dr. Frank Würthner, phone: ++49 931 31 85340, E-mail: wuerthner@chemie.uni-wuerzburg.de
Original paper:
"A Crystal-Engineered Hydrogen-Bonded Octachloroperylene Diimide with a Twisted Core: An n-Channel Organic Semiconductor"
M. Gsänger, J. H. Oh, M. Könemann, H. W. Höffken, A.-M. Krause, Z. Bao, F. Würthner, Angew. Chem. Int. Ed. 2010, 49, 740 - 743; doi:10.1002/anie.200904215
