One-pot synthesis of a stable and cost-effective silver particle-free ink for inkjet-printed flexible electronics

Yang, Wendong; Mathies, Florian; Unger, Eva; Hermerschmidt, Felix; List‐Kratochvil, Emil J. W.

doi:10.1039/d0tc03864d

Cited by 25 publications

(19 citation statements)

References 59 publications

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“…When the circuit was turned on, the resistivity of the circuit was suddenly decreased from 1219 to 7.7 × 10 –6 Ω·m within 1.1 s (Figure d). The conductivities of other metal-based conductive inks like Ag and Cu nanoparticles were 3.7 to 199 μΩ·cm , and 1.8 to 1200 μΩ·cm, , respectively. Moreover, the conductivity of the conducted PVA-LM ink was 1.3 × 10 5 S/m, which was much higher than those of other conductive composites such as carbon-based composite materials (0.1–8.2 S/m), − conductive polymers (1–40 S/m), − and metallic salts (0–10 S/m). − Therefore, this high conductivity ink can be utilized to fabricate wearable devices with high performance and low energy consumption.…”

Section: Resultsmentioning

confidence: 99%

Printable and Recyclable Conductive Ink Based on a Liquid Metal with Excellent Surface Wettability for Flexible Electronics

Guo

Ding

et al. 2021

ACS Appl. Mater. Interfaces

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Flexible electronics greatly facilitate human life due to their convenience and comfortable utilization. Liquid metals are an ideal candidate for flexible devices; however, the high surface tension and poor surface wettability restrict their application on diverse substrates. Herein, a printable and recyclable ink composed of poly(vinyl alcohol) and a liquid metal (PVA-LM) was developed to resolve these problems. The materials were designed considering the compatibility between PVA and the liquid metal, and the composite theory was applied to determine the component proportion. The developed composites improved the surface wettability of the liquid metal on diverse substrates, and three-dimensional (3D) printing technology was chosen to maximize the use of this material. Moreover, the PVA-LM ink showed excellent conductivity of about 1.3 × 105 S/m after being turned on, which favored the designing of alarm systems and object locators. The flexible sensors produced with this ink have broad application, high sensitivity, and superstable signal generation even after 200 cycles. When acting as strain sensors, the constructed composites had high sensitivity for monitoring the human movements. Furthermore, liquid metals in printed products can be recycled under alkaline conditions. This study opens a new direction for the next generation of environmentally friendly flexible devices.

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Section: Resultsmentioning

confidence: 99%

Printable and Recyclable Conductive Ink Based on a Liquid Metal with Excellent Surface Wettability for Flexible Electronics

Guo

Ding

et al. 2021

ACS Appl. Mater. Interfaces

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“…A specific conductivity of 3 × 10 3 ± 6 × 10 3 S m −1 was calculated using eqn (1) at a thickness of 5.5 ± 0.5 μm (see Experimental section). This conductivity is three orders of magnitude below that reported for AgNP-based inkjet inks after sintering at 100–400 °C for at least 30 min to two hours 50–55 but above that reported for dry PEDOT:PSS films (0.02–0.2 S m −1 56 ). Resistance measurements were repeated 24 h after deposition and calculated average conductivity was 1.7 × 10 6 S m −1 ± 0.3 × 10 6 S m −1 .…”

Section: Resultsmentioning

confidence: 53%

Sacrificial ligand route to hybrid polythiophene–silver nanoparticles for sinter-free conductive inks

Drzic

Escudero

González‐García

et al. 2023

Inorg. Chem. Front.

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“…This particle-free ink was simply prepared by dissolving sparingly soluble Ag 2 C 2 O 4 powder into the solvent containing 1,2-diaminopropane(1,2-DAP), where 1,2-DAP was chosen as the ligand in this ink to react with silver oxalate through a complex reaction . For 1,2-DAP with relatively short carbon chains and more amino groups, it could have a stronger capacity to donate electrons, so that it coordinated with silver ions more quickly and stably …”

Section: Resultsmentioning

confidence: 99%

Morphological Regulation of Printed Low-Temperature Conductive Ink

Liu

Guo²,

et al. 2022

Langmuir

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The unbalanced evaporation of solvents in lowtemperature sintered inks for printed electronics leads to a series of problems in the actual printing process, including printed pattern distortion, surface cracking, and the coffee ring effect, which has become a serious obstacle to this technique. Here, we present a comprehensive investigation of the influence of the solvent composition, environmental, and sintering conditions on the complicated pattern formation process of reactive silver inks. The results first showed that only inks with a certain wettability of solvents could form well-defined patterns. Then, the solvent composition and ambient humidity can be adjusted to balance the nonequilibrium evaporative flow within the liquid and thus to obtain a flat liquid film. Combined with the rapid UV sintering process, the particle size, porosity, and roughness could be controlled to produce dense and homogeneous silver films. Finally, we successfully printed silver electrodes with a smooth and dense surface (R qs ∼ 21 nm in 0.8 × 0.8 mm 2 area and less than 1% porosity) under an optimized relative humidity (RH) of 50−60% at room temperature with the solvent composition of IPA (isopropanol)/2,3-BD (2,3-butanediol) = 8:2. In addition, we also demonstrated high-performance Pr−IZO (praseodymium-doped indium−zinc oxide) thin film transistors (TFTs) with a mobility (μ sat ) of 2.14 cm 2 /V/s and I on /I off ratio of over 10 7 using source−drain electrodes printed under optimized conditions.

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One-pot synthesis of a stable and cost-effective silver particle-free ink for inkjet-printed flexible electronics

Abstract: Silver particle-free inks display immense superiority and potential over silver nanoparticle-based inks in the aspect of synthesis, flexibility and low-temperature processing, which has attracted considerable research interest as an alternative...

Cited by 25 publications

References 59 publications

Printable and Recyclable Conductive Ink Based on a Liquid Metal with Excellent Surface Wettability for Flexible Electronics

Printable and Recyclable Conductive Ink Based on a Liquid Metal with Excellent Surface Wettability for Flexible Electronics

Sacrificial ligand route to hybrid polythiophene–silver nanoparticles for sinter-free conductive inks

Morphological Regulation of Printed Low-Temperature Conductive Ink

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