TransCap: a monolithically integrated supercapacitor and electrolyte-gated transistor

Sayago, Jonathan; Shafique, Umar; Soavi, Francesca; Cicoira, Fabio; Santato, Clara

doi:10.1039/c4tc02119c

Cited by 16 publications

(18 citation statements)

References 33 publications

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“…For the different EGTs here considered up to 50% of the energy spent to drive the EGT can be stored (E stored = 100 Egs/E EGT ), and thus, saved (Table S1). More importantly, these results point to the integration of EGT and μSCs at materials level, which has been demonstrated with TransCap [27]. TransCap featured an MEHPPV channel, a gate based on commercial activated carbon layer deposited on carbon paper and the ionic liquid N 1113 TFSI.…”

Section: Introductionmentioning

confidence: 73%

Miniaturized supercapacitors: key materials and structures towards autonomous and sustainable devices and systems

Soavi

Bettini

Piseri

et al. 2016

Journal of Power Sources

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Supercapacitors (SCs) are playing a key role for the development of self-powered and self-sustaining integrated systems for different fields ranging from remote sensing, robotics and medical devices. SC miniaturization and integration into more complex systems that include energy harvesters and functional devices are valuable strategies that address system autonomy. Here, we discuss about novel SC fabrication and integration approaches. Specifically, we report about the results of interdisciplinary activities on the development of thin, flexible SCs by an additive technology based on Supersonic Cluster Beam Deposition (SCBD) to be implemented into supercapacitive electrolyte gated transistors and supercapacitive microbial fuel cells. Such systems integrate at materials level the specific functions of devices, like electric switch or energy harvesting with the reversible energy storage capability. These studies might open new frontiers for the development and application of new multifunction-energy storage elements.

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Section: Introductionmentioning

confidence: 73%

Miniaturized supercapacitors: key materials and structures towards autonomous and sustainable devices and systems

Soavi

Bettini

Piseri

et al. 2016

Journal of Power Sources

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“…We have recently demonstrated that electrolyte‐gated transistors based on organic polymers can be also exploited for energy storage purposes into a novel device structure named transcap (transistor‐capacitor) . This device exploits the high pseudocapacitance and capacitance displayed by organic conducting polymers and high surface area carbons at the interface with an electrolyte.…”

Section: Resultsmentioning

confidence: 99%

“…This device exploits the high pseudocapacitance and capacitance displayed by organic conducting polymers and high surface area carbons at the interface with an electrolyte. Specifically, transcaps combine charge transport and charge storage features to yield a low‐energy cost device that can drive/power additional elements . We fabricated transcaps on rigid substrates and employing the organic semiconductor poly[2‐methoxy‐5‐(20‐ethylhexyloxy)−1,4‐phenyl‐ene vinylene (MEH PPV) as the channel material, the ionic liquid 1‐Ethyl‐3‐methylimidazolium bis(trifluoromethylsulfonyl)imide (EMIM TFSI) as the electrolyte and activated carbon on carbon paper as the gate, in a stacked configuration .…”

Section: Resultsmentioning

confidence: 99%

“…Electrolyte‐gated transistors are widely investigated for applications in bioelectronics as well as flexible and printed electronics, because of their low operating voltage, ease of processing, and biocompatibility when interfaced with tissues . Several electrolyte‐gated transistors have been reported so far, based on organic and inorganic materials, such as organic semiconductors, conducting polymers, metal oxides, and carbon nanomaterials . In particular, organic electrochemical transistors (OECTs) based on the conducting polymer poly(3,4‐ethylenedioxythiophene) doped with polystyrenesulfonate (PEDOT:PSS) are playing a major role in novel bioelectronics applications, such as neural electrodes and biosensors …”

Section: Introductionmentioning

confidence: 99%

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Flexible conducting polymer transistors with supercapacitor function

Zhang

Bettini

Tomasello

et al. 2016

J. Polym. Sci. Part B: Polym. Phys.

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Planar organic electrochemical transistors (OECTs) using PEDOT:PSS as the channel material and nanostructured carbon (nsC) as the gate electrode material and poly(sodium 4styrenesulfonate (PSSNa) gel as the electrolyte were fabricated on flexible polyethylene terephthalate (Mylar V R ) substrates. The nsC was deposited at room-temperature by supersonic cluster beam deposition (SCBD). Interestingly, the OECT acts as a hybrid supercapacitor (to give a device that we indicate as transcap). The energy storage ability of transcaps has been studied with two cell configurations: one featuring PEDOT:PSS as the positive electrode and nsC as the negative electrode and another configuration with reversed electrode polarity.Potentiostatic charge/discharge studies show that both supercapacitors show good performance in terms of voltage retention, in particular, when PEDOT:PSS is used as the positive electrode. Galvanostatic charge-discharge characteristics show typical symmetric triangular shape, indicating a nearly ideal capacitive behavior with a high columbic efficiency (close to 100%).

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“…The slow component of the time response is comparable to other electrolyte gated devices. [15,17] To check the behavior of the slow response with temperature, we measured the electrical properties of graphene using a cryostat partially evacuated with a rotary pump (Figure 2f). …”

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confidence: 99%

Solid‐State Electrolyte‐Gated Graphene in Optical Modulators

et al. 2017

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The gate-tunable wide-band absorption of graphene makes it suitable for light modulation from terahertz to visible light. The realization of graphene-based modulators, however, faces challenges connected with graphene's low absorption and the high electric fields necessary to change graphene's optical conductivity. Here we demonstrate a solid state supercapacitor effect with the high-k dielectric hafnium oxide that allows modulation from the near-infrared to shorter wavelengths close to the visible spectrum with remarkably low voltages (~3 V).The electro-absorption modulators are based on a Fabry-Perot resonator geometry that allows modulation depths over 30% for free-space beams.

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TransCap: a monolithically integrated supercapacitor and electrolyte-gated transistor

Abstract: We report the proof-of-concept of the TransCap, a monolithically integrated device that exhibits the storage properties of a supercapacitor and the low-voltage operation of an electrolyte-gated transistor.

Cited by 16 publications

References 33 publications

Miniaturized supercapacitors: key materials and structures towards autonomous and sustainable devices and systems

Miniaturized supercapacitors: key materials and structures towards autonomous and sustainable devices and systems

Flexible conducting polymer transistors with supercapacitor function

Solid‐State Electrolyte‐Gated Graphene in Optical Modulators

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