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Improvements of morphologies and emission characteristics of highly purified organic oligomer semiconductors |
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| Authors: | Takeshi Yamao Takuya Sakaguchi Keiichiro Juri Hiroko Doi Akira Kamoi Naotoshi Suganuma Shu Hotta |
| Affiliation: | aDepartment of Macromolecular Science and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan;bPhotonics Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5-1, 1-1-1, Higashi, Tsukuba 305-8565, Japan |
| Abstract: | 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. |
| Keywords: | Organic semiconducting oligomers Thiophene/phenylene co-oligomers Train sublimation Film morphology Organic field-effect transistors Light emission |
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