High performance functionalized asymmetric linear acenes for organic TFTs

POLY 580

Ming L. Tang, minglee@stanford.edu1, Anna D. Reichardt, annadevi@stanford.edu1, and Zhenan Bao, zbao@stanford.edu2. (1) Department of Chemistry, Stanford University, Stanford, CA 94305, (2) Department of Chemical Engineering, Stanford University, Stanford, CA 94305
Pentacene is the workhorse of the organic semiconductor industry, with reliably high mobilities, and decent on-off ratios. In this work, we present a series of novel linear acenes that contain a fused thiophene unit, which are more stable than pentacene and have a mobility >0.2cm2V-1s-1. These acenes have conjugation lengths between anthracene and hexacene. Thin films of these linear molecules were characterized by ultra-violet spectroscopy, x-ray diffraction, atomic force microscopy (AFM) and field-effect transistor measurements. Mobilites as high as 0.73cm2V-1s-1 have been found. We will present interesting halogenated and alkylated derivatives of these asymmetric linear acenes, as well as derivatives with electron withdrawing groups
 

Conjugated Polymer Materials and Hybrids: Synthesis, Macromolecular Assemblies, and Nanostructures
2:00 PM-4:50 PM, Wednesday, August 22, 2007 Westin Boston Waterfront -- Grand Ballroom C, Oral

Division of Polymer Chemistry

The 234th ACS National Meeting, Boston, MA, August 19-23, 2007