Solution-Processed Multistacked Tin-Doped Indium Oxide Nanoparticle Conductors for Cost-Effective Thin Film Heaters

Cho, Yong-Hwan; Raman, V.; Beigtan, Mohadese; Kim, Yunseok; Kim, Han−Ki

doi:10.1021/acsaelm.1c00052

Cited by 9 publications

(4 citation statements)

References 68 publications

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“…Transparent heaters have been widely used in technologies such as outdoor display panels, self-heated sensors, medical thermotherapy pads, electrothermal actuators, film-type defrosters, and heating textiles. − Indium tin oxide (ITO) is the conducting material most commonly used for conventional transparent heaters because of its high transmittance and favorable stability. , However, the use of ITO in flexible substrates is highly limited owing to its inherent brittleness and harsh preparation conditions. , Hence, these drawbacks encourage the consideration of alternative transparent conductive thin films.…”

Section: Introductionmentioning

confidence: 99%

“…1−5 Indium tin oxide (ITO) is the conducting material most commonly used for conventional transparent heaters because of its high transmittance and favorable stability. 6,7 However, the use of ITO in flexible substrates is highly limited owing to its inherent brittleness and harsh preparation conditions. 1,8 Hence, these drawbacks encourage the consideration of alternative transparent conductive thin films.…”

Section: ■ Introductionmentioning

confidence: 99%

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Ultrahigh-Temperature-Tolerant NiO@Ag NW-Based Transparent Heater with High Stability, Durability, Ultraflexibility, and Quick Thermal Response

Song

2023

ACS Appl. Nano Mater.

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High-performance electrical heaters with high transmittance, fast response speed, superior heat resistance, ultraflexibility, high working temperature, and sufficient stabilities are highly desirable for application in heating systems in areas such as healthcare and aerospace. Herein, we demonstrate an ultrahigh-temperature-tolerant flexible transparent heater (FTH) consisting of a NiO@Ag core–shell nanowire (NiO@Ag NW) network and a colorless polyimide (cPI) film. NiO nanoshells are formed uniformly on the surface of Ag NWs through the solution process, which enhances the stability of Ag NWs. The heating behaviors and transmittance can be controlled by the NiO@Ag NW spin-coating cycle. The NiO@Ag NW-based FTHs show a fast thermal response of ∼15 s, a high transmittance of 86.2% in the visible region, and a large thermal figure of merit of 30.7 m2·°C/W under optimal preparation conditions. The saturation temperature of FTHs has barely changed after 20 taping tests and 1000 bending cycles at a bending radius of 0.5 mm. Particularly, the heating temperature of FTHs can reach 266 °C in the air under an applied voltage of 9 V. Moreover, the FTHs possess sufficient heating reliability, stability, and repeatability during the long-term and repeated heating cycles. In addition, the FTHs are resistant to a number of harsh environments.

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Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Ultrahigh-Temperature-Tolerant NiO@Ag NW-Based Transparent Heater with High Stability, Durability, Ultraflexibility, and Quick Thermal Response

Song

2023

ACS Appl. Nano Mater.

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“…However, research on heaters specifically designed for the NIR range remains limited. Although the use of various materials such as nanostructured metals, , carbon-based nanomaterials, , and transparent conducting oxides (TCOs) − as transparent heaters has been investigated, most of these materials offer high transparency only in the visible range. Commercial TCOs, despite being known for their transparency (>80%) and low sheet resistance (<100 Ω/sq) in the visible range (380–780 nm), are not suitable for NIR applications because of their plasmonic absorption. , …”

Section: Introductionmentioning

confidence: 99%

Near-Infrared Transparent Transition-Metal-Doped Indium Oxide Thin-Film Heater for LiDAR

Huynh,

Hwang,

Choi

et al. 2023

ACS Appl. Mater. Interfaces

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The evolving need for all-weather light detection and ranging (LiDAR) sensors and cameras for autonomous vehicles, remote sensing surveillance, and space exploration has spurred the development of transparent heaters. While LiDAR photon sources have shifted from the visible to the nearinfrared (NIR) range, the use of transparent conductive oxides (TCOs) for heaters leads to significant optical losses due to their high plasmonic absorption and reflection in the NIR range. Although different TCO compositions can be employed to preserve transparency and electrical conductivity in this range, the choice of dopants, their concentrations, and the underlying mechanisms remain largely unknown. In this study, we present TCOs specifically designed for NIR applications with a focus on identifying new compositions that strike a balance between NIR transparency and electrical conductivity. We present a 4B−6B transition-metaldoped indium oxide thin-film heater that exhibits impressive NIR transmittance (>90%) surpassing that of commonly used indium tin oxide films. By incorporating effective dopants such as titanium, hafnium, and tungsten, we successfully reduced the resistivity and enhanced the electrical conductivity of indium oxide films. To enhance the practical utility of the film, we implemented posttreatments comprising argon plasma treatment and encapsulation with low-molecular-weight poly(dimethylsiloxane), which resulted in significantly improved performance. The optimized film exhibited a sheet resistance of 520 Ω/sq and excellent optical transmittance at 850 nm (89.1%), 905 nm (89.7%), and 1550 nm (92%). Moreover, we successfully integrated defogging and defrosting capabilities into a commercial LiDAR camera and demonstrated its reliable operation in challenging environments.

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“…With the development of energy-efficient smart buildings and automobiles, multi-functional smart windows compatible with transparent information displays, electrochromic devices, and transparent window heaters that can be connected to electronic devices, such as smartphones, are being applied to a wide range of applications. [1][2][3][4][5][6][7] One of several important components of the smart window is the flexible and transparent TFH that removes frost, snow, and fog on the window surface. [8] In addition, to maintain the clean surface of the window named as a self-cleanable window, the surface of TFH has a hydrophobic property.…”

Section: Introductionmentioning

confidence: 99%

Highly Transparent, Flexible, and Hydrophobic Polytetrafluoroethylene Thin Film Passivation for ITO/AgPdCu/ITO Multilayer Electrodes

Kim

Kang

Kim

2022

Adv Materials Inter

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Transparent and flexible polytetrafluoroethylene (PTFE) thin film passivation for ITO/AgPdCu (APC)/ITO (IAI) electrodes is developed to prevent severe degradation and maintain the reliable performance of the flexible IAI electrodes. Also, oxygen ion beam treatment (IBT) on the surface of the IAI electrode improves the adhesion between the top ITO and PTFE passivation layer, as well as the performance of the passivation layer. The IAI electrode with PTFE passivation exhibits constant sheet resistance, transmittance, and flexibility, even after the 85 °C and 85% RH test. However, the bare IAI electrode shows a significant increase in sheet resistance and a decrease in transmittance and flexibility, owing to the incorporation of moisture and impurities into the IAI layer, and agglomeration of the APC layer. To demonstrate the feasibility of PTFE passivation, the performance of flexible and transparent thin film heaters (TFHs) with the bare IAI and PTEF/IAI samples are compared. The better stability and reliability of the PTFE/IAI‐based TFHs than the bare IAI‐based TFHs indicate that the PTFE film effectively prevents the introduction of moisture and impurities. The performance of the TFH with PTFE/IAI electrode implies that sputtered PTFE film is a promising transparent and flexible thin film passivation for high‐quality oxide‐metal‐oxide multilayer electrodes.

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Solution-Processed Multistacked Tin-Doped Indium Oxide Nanoparticle Conductors for Cost-Effective Thin Film Heaters

Cited by 9 publications

References 68 publications

Ultrahigh-Temperature-Tolerant NiO@Ag NW-Based Transparent Heater with High Stability, Durability, Ultraflexibility, and Quick Thermal Response

Ultrahigh-Temperature-Tolerant NiO@Ag NW-Based Transparent Heater with High Stability, Durability, Ultraflexibility, and Quick Thermal Response

Near-Infrared Transparent Transition-Metal-Doped Indium Oxide Thin-Film Heater for LiDAR

Highly Transparent, Flexible, and Hydrophobic Polytetrafluoroethylene Thin Film Passivation for ITO/AgPdCu/ITO Multilayer Electrodes

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