Synthesis and Hole-Transporting Properties of Highly Fluorescent N-Aryl Dithieno[3,2-b:2′,3′-d]pyrrole-Based Oligomers

• Published in: Journal of physical chemistry. C Vol. 114; no. 10; pp. 4628 - 4635
• Main Authors: Balaji, Ganapathy, Parameswaran, Manoj, Jin, Tan Mein, Vijila, Chellappan, Furong, Zhu, Valiyaveettil, Suresh
• Format: Journal Article
• Language: English
• Published: American Chemical Society 18.03.2010
• Subjects: C: Electron Transport, Optical and Electronic Devices, Hard Matter
• ISSN: 1932-7447; 1932-7455
• DOI: 10.1021/jp909064n

A new series of dithieno[3,2-b:2′,3′-d]pyrrole-incorporated oligomers was synthesized and characterized. The crystal structure, crystal packing, optical properties, electrochemical properties, and time-of-flight mobilities were investigated in detail. The oligomers are highly fluorescent in both solution and the solid state. The solution-state quantum yield of these new compounds ranged from 52 to 75%. Band gaps of these oligomers were found to be in the range of 2.5−2.8 eV. The surface morphology of the film was also characterized by atomic force microscopy. The material was found to be hole-transporting with a mobility on the order of 10−6 cm2/(V s).