Influence of ambient atmosphere on the electrical properties of organic thin film transistors

Chaâbane, Rafik Ben; Ltaief, A.; Kaabi, L.; Ouada, H. Ben; Jaffrézic‐Renault, Nicole; Davenas, J.

doi:10.1016/j.msec.2005.10.018

Cited by 11 publications

(8 citation statements)

References 16 publications

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“…[3][4][5] A key issue regarding the widespread production of OTFTs is the long term stability and device integrity in ambient operating conditions. [6][7][8] Among the small molecule based OTFTs, pentacene OTFTs have received significant attention regarding instability to ambient components such as oxygen and humidity. [9][10][11][12][13] Several mechanisms have been proposed to explain this instability in pentacene OTFTs, including water adsorption in grain boundaries, 11,12 and oxygen generated impurites.…”

Section: Introductionmentioning

confidence: 99%

“…16 However, a limited number of studies have been reported concerning the degradation of OTFT performance where MPcs are employed as the organic active layer. 6,17,18 A systematic approach to isolating the cause of device degradation ͑"aging"͒ in copper phthalocyanine ͑CuPc͒ OTFTs can provide insight to the interactions of MPc films with atmospheric agents.…”

Section: Introductionmentioning

confidence: 99%

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Ambient induced degradation and chemically activated recovery in copper phthalocyanine thin film transistors

Park

Royer

Colesniuc

et al. 2009

Journal of Applied Physics

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The electrical degradation ͑aging͒ of copper phthalocyanine ͑CuPc͒ organic thin film transistors ͑OTFTs͒ was investigated. Thick ͑1000 ML͒ and ultrathin ͑4 ML͒ channel thicknesses were used in bottom contact OTFTs to correlate the electrical effects of aging with film microstructure. Proper TFT saturation behavior was unattainable in thick devices subject to ambient aging; however ultrathin devices were significantly less susceptible and maintained good saturation and subthreshold behavior. Therefore 1000 monolayer ͑ML͒ CuPc OTFTs were characterized in ambient air, clean dry air, clean humidified air, and NO x environments to isolate the ambient components that induce aging. Thick channel devices which had been aged in ambient air to the point of losing all saturation behavior could be restored to proper saturation behavior by exposure to clean humidified air. The data are consistent with aging resulting primarily from adsorption of strong oxidants from ambient air within the grain boundaries of the CuPc films.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ambient induced degradation and chemically activated recovery in copper phthalocyanine thin film transistors

Park

Royer

Colesniuc

et al. 2009

Journal of Applied Physics

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“…On the other hand, only few works demonstrated the possibility of OFETs operating in [33,34] and detecting analytes in aqueous media [35,36] because of organic material degradation and delamination when exposed to an aqueous environment [37,38]. However, real-time detection of biological analytes requires stability for sensor operation in aqueous media.…”

Section: Organic Field-effect Transistorsmentioning

confidence: 99%

Microcantilevers and organic transistors: two promising classes of label-free biosensing devices which can be integrated in electronic circuits

et al. 2011

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Most of the success of electronic devices fabricated to actively interact with a biological environment relies on the proper choice of materials and efficient engineering of surfaces and interfaces. Organic materials have proved to be among the best candidates for this aim owing to many properties, such as the synthesis tunability, processing, softness and self-assembling ability, which allow them to form surfaces that are compatible with biological tissues. This review reports some research results obtained in the development of devices which exploit organic materials' properties in order to detect biologically significant molecules as well as to trigger/capture signals from the biological environment. Among the many investigated sensing devices, organic field-effect transistors (OFETs), organic electrochemical transistors (OECTs) and microcantilevers (MCLs) have been chosen. The main factors motivating this choice are their label-free detection approach, which is particularly important when addressing complex biological processes, as well as the possibility to integrate them in an electronic circuit. Particular attention is paid to the design and realization of biocompatible surfaces which can be employed in the recognition of pertinent molecules as well as to the research of new materials, both natural and inspired by nature, as a first approach to environmentally friendly electronics.

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“…For the detection of CWAs, there is a demand for small, portable, and inexpensive sensors. OTFTs have many advantages over other types of sensors that may allow them to meet these needs, such as their ease of deposition, ability to operate at room temperature and the multi-dimensional patter [3][4]. Therefore, there has been an increasing progress in OTFT performances during the last decade.…”

Section: Introductionmentioning

confidence: 99%

“…Metal-Phthalocyanine (M-Pc) is known to be very sensitive and also selective to different gases and solvents as an account of the central metal atoms of the molecule, which can be easily varied. Phthalocyanine especially, due to their highly thermal stability, posses a wide range of chemical and physical properties, that make them interesting as an active layer in OTFTs [3]. Over the past decade, the use of M-Pc as a sensitive component has been investigated for many kinds of gases [5][6].However, to the best of our knowledge, there were few reports for the DMMP sensor using the M-Pc as the sensitive materials.…”

Section: Introductionmentioning

confidence: 99%

P1.1.4 Phthalocyanine Organic ThinFilm Transistors for the Detection of dimethyl methyl phosphonate (DMMP)

Tai¹,

Xie²,

Li³

et al. 2012

Proceedings IMCS 2012

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The electrical properties of Metal-Phthalocyanines (M-Pc) are affected upon exposure to gases containing not only some oxidizing/deoxidizing molecules but also nerve agent simulants. This phenomenon finds application in the use of Organic Thin-Film Transistors (OTFTs) based on copper phthalocyanine (CuPc) and cobalt phthalocyanine (CoPc) as gas sensors. In this work, tests of dimethyl methyl phosphonate (DMMP) detecting were carried out, and the sensing mechanism of OTFT DMMP sensors was further investigated by the transfer curve of OTFTs and the UV-Vis absorption spectra of sensitive films before and during DMMP vapor exposure. The results showed that M-Pc-based OTFTs can represent a new class of DMMP sensors.

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Influence of ambient atmosphere on the electrical properties of organic thin film transistors

Cited by 11 publications

References 16 publications

Ambient induced degradation and chemically activated recovery in copper phthalocyanine thin film transistors

Ambient induced degradation and chemically activated recovery in copper phthalocyanine thin film transistors

Microcantilevers and organic transistors: two promising classes of label-free biosensing devices which can be integrated in electronic circuits

P1.1.4 Phthalocyanine Organic ThinFilm Transistors for the Detection of dimethyl methyl phosphonate (DMMP)

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