2010 Fiscal Year Final Research Report
Terahertz spectroscopic elucidation of the carrier dynamics in semiconducting conjugated polymers
| Project/Area Number |
20740174
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Condensed matter physics I
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| Research Institution | Nagoya University |
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Principal Investigator |
UNUMA Takeya Nagoya University, 大学院・工学研究科, 助教 (20456693)
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| Project Period (FY) |
2008 – 2010
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| Keywords | テラヘルツ / 有機半導体 |
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| Research Abstract |
To clarify the optoelectronic nature of charge carriers in conjugated polymers, we measured their complex conductivity spectra using terahertz electromagnetic waves, which are ranked between light and radio waves. Carriers created chemically in a typical conjugated polymer, polythiophene, exhibited a rather high dc conductivity but a different spectral shape from the metallic feature in the terahertz frequency range. This means that carriers are, to a certain extent, spatially localized. We found that carriers in polythiophenes become less localized with increasing carrier density.
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