Low-temperature supercritical dehydroxylation for achieving an ultra-low subthreshold swing of thin-film transistors

Chang, Kuan‐Chang; Hu, Luodan; Qi, Kang; Li, Lei; Lin, Xinnan; Zhang, Shengdong; Wang, Ziwen; Lai, Ying‐Chih; Liu, Heng Jui; Kuo, Tze-Peng

doi:10.1039/d0nr08208b

Cited by 12 publications

(6 citation statements)

References 24 publications

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“…First, water molecules gathered together to form nanocells, as shown in Figure a. Ethanol molecules are hydrophilic groups, which can act as surfactants and wrap around the nanocell. − Owing to the high penetrability of supercritical CO 2 , − H 2 O reacts with CO 2 to produce H 2 CO 3 inside the nanocell and eventually reaches chemical equilibrium. Once the nanocell touches the Zn thin film surface, H 2 CO 3 reacts with Zn to form ZnCO 3 and H 2 , as shown in Figure b.…”

Section: Results and Discussionmentioning

confidence: 99%

Eco-Friendly, Highly Efficient Ethanol-Assisted Supercritical Preparation of an Ultrathin ZnO Nanotube

Chang

Zhou

et al. 2021

ACS Sustainable Chem. Eng.

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The nanotubes widely used in the advanced semiconductor manufacturing field suffer from complicated timeand energy-consuming synthesis processes, thus requiring an efficient preparation method. In this study, ethanol-assisted supercritical treatment (SC-EA), a sustainable approach with less environmental hazard, has been applied to efficiently synthesize ZnO nanotubes. Materials free from any detrimental effect on the environment have been utilized in the proposed ethanol−water mixed supercritical fluid technique to realize nanotube growth. High synthetic efficiency, eco-friendly processing, and an ultrasimple procedure are achieved in the SC-EA treatment at a low temperature and with a low preparation cost. The analysis results from scanning electron microscopy (SEM) and transmission electron microscopy (TEM) collectively confirm the successful synthesis of ZnO nanotubes with an ultrathin crystalline wall of only 3 nm. A chemical reaction model is established for a better understanding of the SC-EA process in which ethanol molecules act as the surfactants to help ZnO nanotubes grow by forming nanocells. Such a green supercritical methodology, by means of an eco-friendly synthesis system in achieving CO 2 reutilization and recycling, provides a bright future to modulate a variety of nanostructured materials in a facile and efficient way.

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Section: Results and Discussionmentioning

confidence: 99%

Eco-Friendly, Highly Efficient Ethanol-Assisted Supercritical Preparation of an Ultrathin ZnO Nanotube

Chang

Zhou

et al. 2021

ACS Sustainable Chem. Eng.

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“…Here, exploiting the advantages of supercritical carbon dioxide (SCCO 2 ) fluid, an eco-friendly strategy named “supercritical-assisted hydration” (abbreviated as SAH) is developed, which can be applied to efficiently remove impurities from PVA while enhancing its electrical and optical properties to a further scope. Supercritical fluid refers to a state of substance beyond the gas and liquid phase, when pressure and temperature exceed the critical point. − With the features of liquid-like super dissolving capabilities and gas-like diffusion properties, supercritical methodology has been exploited in modulating materials, repairing electronics, and eliminating residual monomers. − In this work, the removal of impurities and superior purification of PVA via SCCO 2 fluid is successfully achieved. By eliminating impurities, supercritical-treated PVA is endowed with excellent electrical insulating properties and improved optical transparency.…”

Section: Introductionmentioning

confidence: 99%

Realizing Ultrapurified Poly(vinyl alcohol) with High Insulation and Transparency by Ecofriendly Supercritical Assisted Elimination of Sodium-Associated Impurities

Duan

Huang

et al. 2023

ACS Materials Lett.

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Poly(vinyl alcohol) (PVA) emerges as a promising sustainable material for environmentally friendly electronics, because of its biodegradable and biocompatible properties. Unfortunately, PVA suffers from problems associated with large leakage current, poor stability, and insufficient transparency. Impurities, particularly those related to sodium, are the major cause of the poor electric-optical characteristics when PVA acts as dielectric layer or substrate. However, removal of sodiumassociated impurities has been one of the daunting challenges.Here, an ecofriendly supercritical carbon dioxide (SCCO 2 )assisted hydration (SAH) strategy is introduced to eliminate the deep-seated sodium-related impurities. Ultrapurified PVA is obtained with outstanding insulation and high transmittance via a room-temperature SAH process, resulting in a 100-fold reduction in leakage, better stability, and up to 98% transparency in PVA-based devices. The SAH approach, which can effectively utilize and recycle CO 2 , offers competitive advantages in developing entirely ecofriendly processes and devices, as well as a viable avenue to improve biocompatible materials and electronics.

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“…Flexible electronics researchers have made significant progress and practical application in flexible displays and wearable electronics. [1]- [6] Bao et al explored intelligent soft robots with flexible materials. [7]- [8] Huang et al have pioneered the field of malleable inorganic electronics, which could better meet the needs of the next generation of electronics, such as portability and shape variability.…”

Section: Introductionmentioning

confidence: 99%

Flexible a-InGaZnO Thin Film Transistor Based on Biocompatible Sodium Alginate

Liu

Chin

Huang

et al. 2023

J. Phys.: Conf. Ser.

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Flexible electronics have attracted increased attention in advanced fields, such as electronic skin and flexible displays. However, most flexible electronic devices are made with polymers that lack biocompatibility and environmental friendliness. Meanwhile, the complexity of the manufacturing process further restricts the mass production of flexible devices. This study uses biocompatible sodium alginate (SA) derived from seaweed as a flexible substrate to fabricate a thin film transistor (TFT) without using lithography, effectively protecting the flexible substrate from eroding. The flexible TFT with SA substrate can be opened at the Vg of ~ 0 V, and the mobility 26.8 cm2/(V·s) is realized. Flexible TFT with SA substrate has desirable characteristics, such as biocompatibility, transparency, and high mobility, providing promise for advancing the implementation of electronic skin and flexible displays.

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Low-temperature supercritical dehydroxylation for achieving an ultra-low subthreshold swing of thin-film transistors

Abstract: Thin-film transistors (TFTs) have been widely used in the increasingly advanced display field. However, it remains a challenge for TFTs to overcome the poor subthreshold swing in the fast switching...

Cited by 12 publications

References 24 publications

Eco-Friendly, Highly Efficient Ethanol-Assisted Supercritical Preparation of an Ultrathin ZnO Nanotube

Eco-Friendly, Highly Efficient Ethanol-Assisted Supercritical Preparation of an Ultrathin ZnO Nanotube

Realizing Ultrapurified Poly(vinyl alcohol) with High Insulation and Transparency by Ecofriendly Supercritical Assisted Elimination of Sodium-Associated Impurities

Flexible a-InGaZnO Thin Film Transistor Based on Biocompatible Sodium Alginate

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