期刊
ORGANIC ELECTRONICS
卷 14, 期 6, 页码 1673-1682出版社
ELSEVIER
DOI: 10.1016/j.orgel.2013.03.035
关键词
Phenacene molecule; Single crystals; Field-effect transistor; Ionic liquids; Interface control
资金
- Ministry of Education, Culture, Sports, Science and Technology (MEXT, Japan) [23684028, 22244045, 24654105]
- LEMSUPER Project (JST-EU Superconductor Project)
- ACT-C project from the Japan Science and Technology Agency (JST)
- Special Project of Okayama University/MEXT
- Program to Disseminate the Tenure Tracking System in the Japan Science and Technology Agency (JST)
- Grants-in-Aid for Scientific Research [22244045, 23684028, 24654105] Funding Source: KAKEN
Single crystal field-effect transistors (FETs) using [6] phenacene and [7] phenacene show p-channel FET characteristics. Field-effect mobilities, mu s, as high as 5.6 x 10 (1) cm(2) V (1) s (1) in a [6] phenacene single crystal FET with an SiO2 gate dielectric and 2.3 cm(2) V (1) s (1) in a [7] phenacene single crystal FET were recorded. In these FETs, 7,7,8,8-tetracyanoquinodimethane (TCNQ) was inserted between the Au source/drain electrodes and the single crystal to reduce hole-injection barrier heights. The mu reached 3.2 cm(2) V (1) s (1) in the [7] phenacene single crystal FET with a Ta2O5 gate dielectric, and a low absolute threshold voltage vertical bar V-TH vertical bar (6.3 V) was observed. Insertion of 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F(4)TCNQ) in the interface produced very a high mu value (4.7-6.7 cm(2) V (1) s (1)) in the [7] phenacene single crystal FET, indicating that F(4)TCNQ was better for interface modification than TCNQ. A single crystal electric double-layer FET provided mu as high as 3.8 x 10 (1) cm(2) V (1) s (1) and vertical bar V-TH vertical bar as low as 2.3 V. These results indicate that [6] phenacene and [7] phenacene are promising materials for future practical FET devices, and in addition we suggest that such devices might also provide a research tool to investigate a material's potential as a superconductor and a possible new way to produce the superconducting state. (C) 2013 Elsevier B.V. All rights reserved.
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