Development of the hybrid process of sublimation and solution re-crystallization with ionic liquid as a new purification of organic semiconductor materials

2014 Fiscal Year Final Research Report

• Project/Area Number: 25600074
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Applied materials
• Research Institution: Tohoku University
• Principal Investigator: MATSUMOTO Yuji 東北大学, 工学(系)研究科(研究院), 教授 (60302981)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Keywords: 有機半導体 / イオン液体 / 精製技術

Outline of Final Research Achievements

In the present study, we constructed a prototype system, being the hybrid of sublimation and solution re-crystallization as a new efficient purification process of organic semiconductor materials and verified its capability. In this prototype system, the vapor of pentacene, which was produced in a vacuum by heating the sublimation chamber under Ar gas flow, was introduced into the container filled with ionic liquid, followed by its successful nucleation and crystallization in ionic liquid. The process is expected to be more efficient for purification of organic materials such as pentacene by two synergetic effects of sublimation and re-crystallization, as was evidenced by the preliminary result of the efficient removal of pentacenequinone, which is one of the impurities that were often contained in pentacene, by this principle.

Free Research Field

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