Integration of Organic FETs With Organic Photodiodes for a Large Area, Flexible, and Lightweight Sheet Image Scanners

Someya, Takao; Kato, Y.; Iba, Shingo; Noguchi, Yuichi; Sekitani, Tsuyoshi; Kawaguchi, Hiroshi; Sakurai, Takayasu

doi:10.1109/ted.2005.857935

Cited by 254 publications

(150 citation statements)

References 24 publications

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“…In this context, LS-OFETs offer the unique and interesting possibility of being integrated with the driving electronics ͑i.e., unipolar OFETs͒ as part of the same fabrication process without the need of additional processing steps typically required in photodiode-based organic sensors. 10 In conclusion, electro-optical logic circuits based on light-sensing ambipolar OFETs with fast operating characteristics have been demonstrated. This is the only demonstration of organic circuits where signal processing involves the use of both optical and electrical input signals.…”

Section: -2mentioning

confidence: 89%

Electro-optical circuits based on light-sensing ambipolar organic field-effect transistors

Anthopoulos¹

2007

Applied Physics Letters

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The author reports on light-sensing ambipolar organic field-effect transistors ͑LS-OFETs͒ based on blends of͓6,6͔-phenyl-C 61 -butyric acid methyl ester and poly ͓2-methoxy-5-͑3Ј ,7Ј-dimethyloctyloxy͔͒-p-phenylene vinylene. By carefully tuning the ambipolar transport character of the LS-OFETs, their photoresponsivity can be controlled and optimized. By combining LS-OFETs with ordinary unipolar organic transistors, fabrication of electro-optical switches and logic circuits, such as NOT and OR gates, is demonstrated. This is the only report of organic electro-optical circuits in which signal processing involves the use of both optical and electrical input signals. Such circuits could one day be explored in optical sensor array applications. © 2007 American Institute of Physics. ͓DOI: 10.1063/1.2778754͔Over the past twenty years progress in the area of organic field-effect transistors ͑OFETs͒ and integrated circuits has been driven mainly by the development of organic semiconductors rather than advancements in device and circuit design concepts. In particular, use of OFETs has been restricted in applications where the transistors are used purely as unifunctional devices ͑e.g., current switches͒, notably in pixel engines for active-matrix flexible displays 1 and organic integrated circuits.2,3 Recently, however, organic transistors with additional functionalities, i.e., bifunctional OFETs, have been designed and demonstrated with most notable examples the light-emitting 4-6 and light-sensing 7-9 ͑LS-OFETs͒ transistors. These latter demonstrations are of particular significance since, in principle, design and fabrication of a different breed of organic electro-optical circuits in which the electrical and optical functionalities of these bifunctional transistors are combined, can be envisioned. To this end, of primary importance is the development and demonstration of highperformance bifunctional organic transistors, and in particular LS-OFETs, and their use in technological applications.The present work reports on electro-optical circuits based on ambipolar LS-OFETs and ordinary unipolar OFETs. The former are realized using blends of ͓6 6͔-phenyl-C 61 -butyric acid methyl ester ͓͑60͔PCBM͒ and poly ͓2-methoxy-5-͑3Ј ,7Ј-dimethyloctyloxy-p-phenylene vinylene ͑OC 1 C 10 PPV͒, while the latter using pristine ͓60͔PCBM. By integrating the LS-OFETs with n-channel OFETs, we are able to demonstrate various optoelectronic circuits including switches and logic gates such as NOT and OR. A unique characteristic of these gates is that the input signal͑s͒ can be designed to be either purely optical or a combination of electrical and optical. An additional advantage of this technology, and unlike any other organic-based photodetector, is that LS-OFETs can be integrated with the driving electronics ͑i.e., unipolar OFETs͒ in parallel and side by side employing the same number of processing steps, hence, eliminating the need of additional fabrication costs. 10Field-effect transistors were made using heavily doped Si ++ wafers as the glo...

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Section: -2mentioning

confidence: 89%

Electro-optical circuits based on light-sensing ambipolar organic field-effect transistors

Anthopoulos¹

2007

Applied Physics Letters

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“…Indeed, human skin consists of millions of pain points. Tactile sensors for robots are usually assembled with discrete devices, each with individual wiring; thus, the number of pressure sensors in the case of robots is 19,20 A similar design was also applied in photodetectors 83 and other applications to realize multipoint detection with different sensing functions. 84 …”

Section: Flexible Sensorsmentioning

confidence: 99%

Ultraflexible organic electronics

2015

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“…Biodegradable substrates such as paper are especially interesting for disposable UAV systems. Most of the electrical components required for such a system have already been demonstrated on flexible substrates; these components include sensors, batteries, solar cells, transistors, passive components, and antennas [6][7][8][9][10][11][12][13][14][15][16][17] . The key remaining piece is the realization of mechanical actuation with a form factor and weight that are suitable for UAV integration.…”

Section: Introductionmentioning

confidence: 99%

Printed unmanned aerial vehicles using paper-based electroactive polymer actuators and organic ion gel transistors

2016

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We combined lightweight and mechanically flexible printed transistors and actuators with a paper unmanned aerial vehicle (UAV) glider prototype to demonstrate electrically controlled glide path modification in a lightweight, disposable UAV system. The integration of lightweight and mechanically flexible electronics that is offered by printed electronics is uniquely attractive in this regard because it enables flight control in an inexpensive, disposable, and easily integrated system. Here, we demonstrate electroactive polymer (EAP) actuators that are directly printed into paper that act as steering elements for low cost, lightweight paper UAVs. We drive these actuators by using ion gel-gated organic thin film transistors (OTFTs) that are ideally suited as drive transistors for these actuators in terms of drive current and frequency requirements. By using a printing-based fabrication process on a paper glider, we are able to deliver an attractive path to the realization of inexpensive UAVs for ubiquitous sensing and monitoring flight applications.

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Integration of Organic FETs With Organic Photodiodes for a Large Area, Flexible, and Lightweight Sheet Image Scanners

Cited by 254 publications

References 24 publications

Electro-optical circuits based on light-sensing ambipolar organic field-effect transistors

Electro-optical circuits based on light-sensing ambipolar organic field-effect transistors

Ultraflexible organic electronics

Printed unmanned aerial vehicles using paper-based electroactive polymer actuators and organic ion gel transistors

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