Interplay between Long-Range Crystal Order and Short-Range Molecular Interactions Tunes Carrier Mobility in Liquid Crystal Dyes

• Published in: ACS applied materials & interfaces Vol. 9; no. 7; pp. 6228 - 6236
• Main Authors: Tchamba Yimga, Nadine, Ramanan, Charusheela, Borchert, Holger, Parisi, Jürgen, Untenecker, Harald, Kirsch, Peer, von Hauff, Elizabeth
• Format: Journal Article
• Language: English
• Published: United States American Chemical Society 22.02.2017
• Subjects: ambient temperature; annealing; dyes; electrical properties; light microscopy; liquid crystals; melting; spectroscopy; thermal stability; X-ray diffraction; dye; mobility; molecular packing; thermal stability; liquid crystal; organic semiconductor

We investigated the influence of molecular packing on the optical and electrical properties of the liquid crystalline dye 4,7-bis­[5-(2-fluoro-4-pentyl-phenyl)-2-thienyl]-2,1,3-benzothiadiazole (FPPTB). FPPTB is crystalline at room temperature, exhibits a nematic phase at temperatures above 149 °C a...