Improvements of morphologies and emission characteristics of highly purified organic oligomer semiconductors

• Published in: Thin solid films Vol. 518; no. 2; pp. 489 - 492
• Main Authors: Yamao, Takeshi, Sakaguchi, Takuya, Juri, Keiichiro, Doi, Hiroko, Kamoi, Akira, Suganuma, Naotoshi, Hotta, Shu
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 30.11.2009; Elsevier
• Subjects: Applied sciences; Electronics; Exact sciences and technology; Film morphology; Light emission; Organic field-effect transistors; Organic semiconducting oligomers; Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices; Thiophene/phenylene co-oligomers; Train sublimation; Transistors; Organic semiconducting oligomers; Light emission; Train sublimation; Organic field-effect transistors; Thiophene/phenylene co-oligomers; Film morphology; Molding; Sublimation; Oligophenylenes; Thiophene; Oligomer; Thin film; Field effect transistor; Morphology; Organic semiconductors
• ISSN: 0040-6090; 1879-2731
• DOI: 10.1016/j.tsf.2009.07.005

We have purified oligomer semiconductors through vacuum sublimation and compared the film morphologies and the device performance of the purified materials with those of unpurified ones. We fabricated melt-molding films and thin film organic field-effect transistors (OFETs) using both the purified and unpurified oligomers. Comparing morphologies of the molten films we found regular arrangements of the crystal domains for the purified oligomers. Furthermore, the purified materials show definite light emission from the OFET devices.