2014 Fiscal Year Final Research Report
Measurements of exciton transfer between organic single crystals of different materials
| Project/Area Number |
25610084
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Condensed matter physics II
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| Research Institution | Tohoku University |
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Principal Investigator |
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| Project Period (FY) |
2013-04-01 – 2015-03-31
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| Keywords | 有機半導体 |
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| Outline of Final Research Achievements |
Measurements of exciton diffusion length in tetracene single crystals revealed that the exciton diffusion length is longer than typical thickness of the tetracene single crystals. We successfully developed functionally separated single-crystal organic light-emitting field-effect transistor using the property. The transistor consists of two different organic semiconductor single crystals, which are laminated on a dielectric layer forming bilayer structure. Excitons generated by carrier injection to the bottom semiconductor crystal, which has higher carrier mobility, were transferred to the top semiconductor crystal, which have higher fluorescence efficiency, and light emission from the top crystal was observed.
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| Free Research Field |
固体物理
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