Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 16, Issue 17, Pages 7754-7763Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4cp00579a
Keywords
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Funding
- Japan Security Scholarship Foundation
- Ogasawara Foundation
- Ministry of Education, Culture, Sports, Science and Technology (MEXT) [24108729, 25102533]
- Japan Society for the Promotion of Science (JSPS) [22350080]
- Iwatani Naoji Foundation
- Asahi Glass Foundation
- Murata Science Foundation
- Grants-in-Aid for Scientific Research [24108729, 22350080, 25102533] Funding Source: KAKEN
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Electron transport characteristics in nanosegregated columnar phases of perylene tetracarboxylic bisimide (PTCBI) derivatives bearing oligosiloxane chains are studied over wide temperature ranges using a time-of-flight (TOF) method. In the ordered columnar phases of the PTCBI derivatives bearing disiloxane chains, the electron mobilities exceed 0.1 cm(2) V-1 s(-1) at room temperature. In the disordered columnar phase of the PTCBI derivative bearing trisiloxane chains, the electron mobility reaches the order of 10(-3) cm(2) V-1 s(-1) at around room temperature. These electron mobilities are temperature-independent at around room temperature. However, their dependence upon the electric field becomes larger when the temperature is lowered below room temperature; this behavior is described by a hopping transport mechanism. The experimental results are analyzed using a one-dimensional disorder model.
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