Low-Temperature, Solution-Processed, Transparent Zinc Oxide-Based Thin-Film Transistors for Sensing Various Solvents

You, Hsin-Chiang; Wang, Cheng-Jyun

doi:10.3390/ma10030234

Cited by 13 publications

(7 citation statements)

References 18 publications

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“…Therefore, an OxTFT is a suitable device to effectively sense water molecules by simply analyzing the changes of the Vth. However, as reported by other research groups, the electrical characteristics of the IGZO TFTs degrade greatly when they are exposed to water for a long time [21,22]. In addition, the sensor properties of an OxTFT-based device are defined not only by the Vth shift, but also by the increased drain current [23][24][25].…”

Section: The Effect Of Water Exposure On the Bare Igzo Semiconductor ...mentioning

confidence: 81%

Controllable liquid water sensitivity of polymer-encapsulated oxide thin-film transistors

Yu¹,

Kim²,

Park³

et al. 2020

Semicond. Sci. Technol.

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We demonstrated the controllable liquid water sensitivity of polymer-encapsulated oxide-based thin-film transistors (OxTFTs). The oxide active channels of the fabricated TFTs were utilized as water-sensitive layers. The OxTFTs were encapsulated with several polymers as water controlling layers (WCLs) to investigate and optimize the water sensitivity. It was found that the surface energy and porosity of the WCL significantly affect the water-dependent electrical characteristics of the OxTFTs. By employing poly(vinylidene-trifluoroethylene) (P(VDF-TrFE)) as a WCL and annealing the chosen polymer properly, we achieved a continuous shift of the threshold voltage even after several hours of direct exposure to the liquid phase of water which is crucial for sensor properties of the OxTFTs. The device using P(VDF-TrFE) as the WCL exhibits long-term stable detection characteristics and repeatability, demonstrating its applicability as a low-cost soil moisture sensor.

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Section: The Effect Of Water Exposure On the Bare Igzo Semiconductor ...mentioning

confidence: 81%

Controllable liquid water sensitivity of polymer-encapsulated oxide thin-film transistors

Yu¹,

Kim²,

Park³

et al. 2020

Semicond. Sci. Technol.

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“…You et al proposed a solution-processed ZnO thin film with a thickness of 22 nm as an exposed sensing semiconductor channel to sense and identify different kinds of solution solvents, such as polar solvents (ethanol), non-polar solvents (toluene) and deionized (DI) water [156]. The proposed ZnO TFT sensor with a process temperature less than 300 °C exhibited an on/off current ratio of 10 7 .…”

Section: Biosensormentioning

confidence: 99%

Solution-processed metal-oxide thin-film transistors: a review of recent developments

Chen¹,

Lan²

2019

Nanotechnology

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Driven by the rapid development of novel active-matrix displays, thin-film transistors (TFTs) based on metal-oxide (MO) semiconductors have drawn great attention during recent years. N-type MO TFTs manufactured through vacuum-based processes have the advantages of higher mobility compared to the amorphous silicon TFTs, better uniformity and lower processing temperature compared to the polysilicon TFTs, and visible light transparency which is suitable for transparent electronic devices, etc. However, the fabrication cost is high owing to the expensive and complicated vacuum-based systems. In contrast, solution process has the advantages of low cost, high throughput, and easy chemical composition control. In the first part of this review, a brief introduction of solution-processed MO TFTs is given, and the main issues and challenges encountered in this field are discussed. The recent advances in channel layer engineering to obtain the state-of-the-art solution-processed MO TFTs are reviewed and summarized. Afterward, a detailed discussion of the direct patterning methods is presented, including the direct photopatterning and printing techniques. Next, the effect of gate dielectric materials and their interfaces on the performance of the resulting TFTs are surveyed. The last topic is the various applications of solution-processed MO TFTs, from novel displays to sensing, memory devices, etc. Finally, conclusions are drawn and future expectations for solution-processed MO TFTs and their applications are described.

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“…Meanwhile, the parameters of ZnO-based polymer nanocomposites are strongly affected by various factors such as the filler concentration, size distribution, and degree of dispersion . The ZnO multifunctionality is important for various applications, including catalysts, , photovoltaics, , sensors, − transistors, − TENGs, , and batteries. − In terms of battery applications, ZnO is a high-performance material for reversible electrochemical Li storage. , It exhibits a higher theoretical capacity (978 mAh g –1 ) than that of graphite (372 mAh g –1 ), which is commonly used as an anode material for lithium-ion batteries (LIBs). − However, due to the low electrical conductivity and large volume change of ZnO active materials, they demonstrate a low reversible capacity, poor kinetic properties, and serious capacity fading even at low current densities. , Although numerous efforts (mainly focused on the ZnO particle morphology, aspect ratio, size, and orientation) have been made to overcome these shortcomings, researchers were unable to effectively reduce volume variations and increase the electrical conductivity of ZnO materials. Thus, next-generation ZnO-based anode materials for LIBs must be free from the aforementioned drawbacks.…”

Section: Introductionmentioning

confidence: 99%

ZnO–Plasma Polymer Fluorocarbon Thin Films for Stable Battery Anodes and High-Output Triboelectric Nanogenerators

Song

Kim

Yong

et al. 2022

ACS Appl. Nano Mater.

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In this study, ZnO−plasma polymer fluorocarbon (PPFC) nanocomposite thin films were prepared by a mid-range frequency sputtering method using ZnO−polyfluoroethylene−carbon nanotube hybrid targets, and their optical, physical, and surface properties were investigated as functions of the ZnO concentration in the targets. The obtained films exhibited excellent visible light transmittance and hydrophobic characteristics, while their surface roughness and refractive index increased with increasing the ZnO concentration from 6.52 to 15.3 nm and from 1.45 to 1.55, respectively, due to the larger number of ZnO-related absorption states. In addition, the structures and compositions of the films were determined by X-ray diffraction (XRD), grazing incidence small-angle X-ray scattering (GISAXS), and X-ray photoelectron spectroscopy (XPS). It was found that mixed ZnO nanoparticles were well embedded into the PPFC matrix. Finally, we examined the potential applicability of the fabricated ZnO−PPFC nanocomposite thin films in various fields, such as batteries and triboelectric nanogenerators (TENGs). The TENG output voltage increased by approximately 15.8% from 28.05 V for commercial polytetrafluoroethylene (PTFE)-based generators to 32.48 V for the ZnO−PPFC nanocomposite film-based TENG. Furthermore, the ZnO−PPFC nanocomposite thin film demonstrated a stable performance as a battery anode material. While the output of a ZnO reference electrode decreased by approximately 74.5% after 100 cycles, the output of a ZnO−PPFC anode decreased by only 12.4% and remained stable afterward.

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Low-Temperature, Solution-Processed, Transparent Zinc Oxide-Based Thin-Film Transistors for Sensing Various Solvents

Cited by 13 publications

References 18 publications

Controllable liquid water sensitivity of polymer-encapsulated oxide thin-film transistors

Controllable liquid water sensitivity of polymer-encapsulated oxide thin-film transistors

Solution-processed metal-oxide thin-film transistors: a review of recent developments

ZnO–Plasma Polymer Fluorocarbon Thin Films for Stable Battery Anodes and High-Output Triboelectric Nanogenerators

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