Roll-to-Roll fabrication of ITO thin film for flexible optoelectronics applications: The role of post-annealing

Khachatryan, Hayk; Kim, Dong‐Ju; Kim, Moojin; Kim, Han−Ki

doi:10.1016/j.mssp.2018.07.033

Cited by 26 publications

(12 citation statements)

References 29 publications

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“…All we need to provide is a simple retrofit of a thin transparent film with an appropriate conductive coating on top of the solar panel. For high throughput, techniques such as roll-to-roll deposition can be used ( 57 ). Since we are not limited by the resistance of the thin film due to zero current flow between the electrodes, we can make the coating as thin as possible.…”

Section: Resultsmentioning

confidence: 99%

Electrostatic dust removal using adsorbed moisture–assisted charge induction for sustainable operation of solar panels

Panat

2022

Sci. Adv.

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Dust accumulation on solar panels is a major challenge, as it blocks a large portion of sunlight. Solar panels are therefore cleaned regularly using large quantities of pure water. Consumption of water for cleaning, especially in deserts, poses a substantial sustainability challenge. Here, we present a waterless approach for dust removal from solar panels using electrostatic induction. We find that dust particles, despite primarily consisting of insulating silica, can be electrostatically repelled from electrodes due to charge induction assisted by adsorbed moisture. We experimentally determine dust particle charge by conducting Stokes experiments under an electrostatic field. By considering electrostatic, van der Waals, and gravitational forces, we define the threshold electric potential for particle removal. We also demonstrate dust removal over a broad range of relative humidity, making our approach widely applicable. Last, we develop a lab-scale prototype and demonstrate up to 95% recovery of lost power output using our approach.

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Section: Resultsmentioning

confidence: 99%

Electrostatic dust removal using adsorbed moisture–assisted charge induction for sustainable operation of solar panels

Panat

2022

Sci. Adv.

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“…In general, for ITO to achieve a high transparency and conductivity, a post-annealing process at temperatures ranging from 300 to 700 °C is required after ITO formation [ 17 , 18 ]. However, ITO on a polymer substrate such as PET cannot achieve such a high-temperature post-annealing process and thus has been formed under limited and demanding conditions [ 19 ]. To fabricate the proposed sensor, the applicability of the post-annealing process was demonstrated by considering the relatively high glass-transition/melting temperature of SU-8 [ 20 ] among various organic materials.…”

Section: Resultsmentioning

confidence: 99%

Transparent and Flexible Vibration Sensor Based on a Wheel-Shaped Hybrid Thin Membrane

Lee

et al. 2021

Micromachines

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With the advent of human–machine interaction and the Internet of Things, wearable and flexible vibration sensors have been developed to detect human voices and surrounding vibrations transmitted to humans. However, previous wearable vibration sensors have limitations in the sensing performance, such as frequency response, linearity of sensitivity, and esthetics. In this study, a transparent and flexible vibration sensor was developed by incorporating organic/inorganic hybrid materials into ultrathin membranes. The sensor exhibited a linear and high sensitivity (20 mV/g) and a flat frequency response (80–3000 Hz), which are attributed to the wheel-shaped capacitive diaphragm structure fabricated by exploiting the high processability and low stiffness of the organic material SU-8 and the high conductivity of the inorganic material ITO. The sensor also has sufficient esthetics as a wearable device because of the high transparency of SU-8 and ITO. In addition, the temperature of the post-annealing process after ITO sputtering was optimized for the high transparency and conductivity. The fabricated sensor showed significant potential for use in transparent healthcare devices to monitor the vibrations transmitted from hand-held vibration tools and in a skin-attachable vocal sensor.

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“…A flexible and transparent conductive electrode (FTCE) is a thin film with high transparency, high conductivity, and outstanding flexibility [1][2][3]. Due to the rapid advancements in flexible electronics and wearable devices, FTCEs have gained a great deal of attention as a key component of flexible displays [4][5][6], flexible touch panels [7][8][9], flexible thin film heaters (TFHs) [10][11][12][13][14][15][16], photoelectric devices [17][18][19][20], and wearable electronics [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

“…A flexible and transparent conductive electrode (FTCE) is a thin film with high transparency, high conductivity, and outstanding flexibility [ 1–3 ]. Due to the rapid advancements in flexible electronics and wearable devices, FTCEs have gained a great deal of attention as a key component of flexible displays [ 4–6 ], flexible touch panels [ 7–9 ], flexible thin film heaters (TFHs) [ 10–16 ], photoelectric devices [ 17–20 ], and wearable electronics [ 21–23 ]. Currently, most flexible electronics and wearable devices use Sn-doped In 2 O 3 (ITO) film coated on a flexible substrate through a typical magnetron sputtering process [ 24–26 ] owing to the high conductivity and transparency of commercially available ITO films.…”

Section: Introductionmentioning

confidence: 99%

Highly flexible Ag nanowire network covered by a graphene oxide nanosheet for high-performance flexible electronics and anti-bacterial applications

Sim

Kim

2021

Science and Technology of Advanced Materials

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Highly flexible Ag nanowire network covered by a graphene oxide nanosheet for high-performance flexible electronics and anti-bacterial applicationsWe investigated a flexible and transparent conductive electrode (FTCE) based on Ag nanowires (AgNWs) and a graphene oxide (GO) nanosheet and fabricated through a simple and cost-effective spray coating method. The AgNWs/GO hybrid FTCE was optimized by adjusting the nozzle-to-substrate distance, spray speed, compressor pressure, and volume of the GO solution. The optimal AgNWs/GO hybrid FTCE has a high transmittance of 88 % at a wavelength of 550 nm and a low sheet resistance of 20 Ohm/square. We demonstrate the presence of the GO nanosheet on the AgNWs through Raman spectroscopy. Using secondary electron microscopy and atomic force microscopy, we confirmed that the nanosheet acted as a conducting bridge between AgNWs and improved the surface morphology and roughness of the electrode.Effective coverage by the GO sheet improved the conductivity of the AgNWs electrode Effective coverage of the GO sheet improved conductivity of the AgNWs electrode with minimum degradation of optical and mechanical properties. Flexible thin film heater (TFH) and electroluminescent (EL) devices fabricated on AgNWs/GO hybrid FTCEs showed better performance than devices on bare AgNWs electrodes due to lower sheet resistance and uniform conductivity. In addition, an AgNWs/GO electrode layer on a facial mask acts as a self-heating and antibacterial coating. A facial mask with an AgNWs/GO electrode showed a bacteriostatic reduction rate of 99.7 against Staphylococcus aureus and Klebsiella pneumonia.

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Roll-to-Roll fabrication of ITO thin film for flexible optoelectronics applications: The role of post-annealing

Cited by 26 publications

References 29 publications

Electrostatic dust removal using adsorbed moisture–assisted charge induction for sustainable operation of solar panels

Electrostatic dust removal using adsorbed moisture–assisted charge induction for sustainable operation of solar panels

Transparent and Flexible Vibration Sensor Based on a Wheel-Shaped Hybrid Thin Membrane

Highly flexible Ag nanowire network covered by a graphene oxide nanosheet for high-performance flexible electronics and anti-bacterial applications

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