Ambipolar field-effect transistor characteristics of (BEDT-TTF)(TCNQ) crystals and metal-like conduction induced by a gate electric field

Sakai, Masatoshi; Sakuma, Hirotaka; Ito, Yuya; Saito, Akinobu; Nakamura, Masakazu; Kudo, Kazuhiro

doi:10.1103/physrevb.76.045111

Cited by 75 publications

(62 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Field-effect doping in such materials is of particular interest in condensed matter physics. Ambipolar-type field-effect characteristics are observed in SC-OFETs using Mott insulators of (BEDT-TTF)(F 2 TCNQ) [BEDT-TTF ( bis(ethylenedithio)tetrathiafulvalene)] [14], and of (BEDT-TTF)(TCNQ) [75] as channel single crystals. The unique ambipolar operations may be associated with the effect of carrier accumulation at the Schottky barriers in the source/drain contacts with Mott insulators [76,77].…”

Section: Sc-ofets Of Charge-transfer Compoundsmentioning

confidence: 94%

Organic field-effect transistors using single crystals

Hasegawa

Takeya

2009

Science and Technology of Advanced Materials

351

215

View full text Add to dashboard Cite

Organic field-effect transistors using small-molecule organic single crystals are developed to investigate fundamental aspects of organic thin-film transistors that have been widely studied for possible future markets for 'plastic electronics'. In reviewing the physics and chemistry of single-crystal organic field-effect transistors (SC-OFETs), the nature of intrinsic charge dynamics is elucidated for the carriers induced at the single crystal surfaces of molecular semiconductors. Materials for SC-OFETs are first reviewed with descriptions of the fabrication methods and the field-effect characteristics. In particular, a benchmark carrier mobility of 20-40 cm 2 Vs −1 , achieved with thin platelets of rubrene single crystals, demonstrates the significance of the SC-OFETs and clarifies material limitations for organic devices. In the latter part of this review, we discuss the physics of microscopic charge transport by using SC-OFETs at metal/semiconductor contacts and along semiconductor/insulator interfaces. Most importantly, Hall effect and electron spin resonance (ESR) measurements reveal that interface charge transport in molecular semiconductors is properly described in terms of band transport and localization by charge traps.

show abstract

Section: Sc-ofets Of Charge-transfer Compoundsmentioning

confidence: 94%

Organic field-effect transistors using single crystals

Hasegawa

Takeya

2009

Science and Technology of Advanced Materials

351

215

View full text Add to dashboard Cite

show abstract

“…Molecular wires of (TTF)(TCNQ) formed under electric fields are investigated, and electron-like transport has been observed, which has been also ascribed to the TCNQ-rich situation. 54 (BEDT-TTF)(TCNQ) behaves as a Mott insulator below the metalinsulator transition temperature at 330 K. Ambipolar transport is observed, and the mobility increases down to 240 K. 55 Additional dielectric anomaly at 285 K has been suggested. 55 Single-crystal transistors of (BEDT-TTF)-(F 2 TCNQ) are also investigated at low temperatures, and ambipolar transport has been observed.…”

Section: ç Ofets Based On Charge-transfer Complexesmentioning

confidence: 99%

“…54 (BEDT-TTF)(TCNQ) behaves as a Mott insulator below the metalinsulator transition temperature at 330 K. Ambipolar transport is observed, and the mobility increases down to 240 K. 55 Additional dielectric anomaly at 285 K has been suggested. 55 Single-crystal transistors of (BEDT-TTF)-(F 2 TCNQ) are also investigated at low temperatures, and ambipolar transport has been observed. 56 ¬-(BEDT-TTF) 2 -Cu[N(CN) 2 ]Br is an organic superconductor with the transition temperature of 11.8 K but located on the border of the Mott insulator.…”

Section: ç Ofets Based On Charge-transfer Complexesmentioning

confidence: 99%

Organic Charge-transfer Salts and the Component Molecules in Organic Transistors

Mori

2011

Chemistry Letters

View full text Add to dashboard Cite

Electron donors and acceptors such as tetrathiafulvalene (TTF) and tetracyanoquinodimethane (TCNQ), which have been long known as components of organic metals, act as p-and n-channel organic semiconductors in organic field-effect transistors. High performance, good thin-film properties, and long-term stability have been achieved on the basis of appropriate molecular design. In addition, their charge-transfer complexes work as the active layers as well as conducting electrode materials showing low contact resistance.

show abstract

“…The monolayer thickness was fitted at about 2.1 nm and separated into a 0.7 nm alkyl-spacer and a 1.4 nm TTF core with clearly different density. An additional layer of about 0.81 nm with a very low density (about 0.24 g/cm 3 ) was calculated to exist on the surface of monolayer. The molecular weight for the EDT-DMT-TTF core and C 9 alkyl chain without phosphonic acid is 385 and 126, respectively, giving a weight ratio of 3.06.…”

Section: Methodsmentioning

confidence: 99%

“…3 (BEDT-TTF = bis(ethylenedithio)tetrathiafulvalene; TCNQ = tetracyanoquinodimethane) Hasegawa T. et al also reported a single-crystal-based Mott FET with a similar compound. 4 Although their device performance was moderate, a fundamental operation was confirmed by these experiments.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Operation of Monolayer Mott FET at Room Temperature

Yang

Suda

Yamamoto

2017

Bulletin of the Chemical Society of Japan

View full text Add to dashboard Cite

Self-assembled monolayer FET based on a TTF derivative is described (FET = field-effect-transistor, TTF = tetrathiafulvalene). The molecule is anchored on an alumina dielectric layer through covalent bonding of a phosphonic acid linker. A p-type monolayer FET device is achieved and subsequent chemical doping of this monolayer with F 4 TCNQ dopants results in an ambipolar device. (F 4 TCNQ = 2,3,5,6-Tetrafluoro-7,7,8,8-tetracyanoquinodimethane) Several strange behaviors including a gate voltage shift upon doping seem to be consistent with organic monolayer Mott FET. Finally, temperature dependence of the FET performance, which also fit the anticipated Mott FET behavior, is discussed.

show abstract

Ambipolar field-effect transistor characteristics of (BEDT-TTF)(TCNQ) crystals and metal-like conduction induced by a gate electric field

Cited by 75 publications

References 40 publications

Organic field-effect transistors using single crystals

Organic field-effect transistors using single crystals

Organic Charge-transfer Salts and the Component Molecules in Organic Transistors

Fabrication and Operation of Monolayer Mott FET at Room Temperature

Contact Info

Product

Resources

About