scholarly journals Highly stabilized flexible transparent capacitive photodetector based on silver nanowire/graphene hybrid electrodes

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yooji Hwang ◽  
Young Hyun Hwang ◽  
Kwang Wook Choi ◽  
Seungwon Lee ◽  
Soojin Kim ◽  
...  
Keyword(s):  
Sheet Resistance ◽  
Dielectric Layer ◽  
Measurement Techniques ◽  
Current Measurement ◽  
Silver Nanowire ◽  
Semiconductor Materials ◽  
Graphene Electrode ◽  
Mechanical Durability ◽  
New Type ◽  
Ag Nanowire

AbstractThe need for photodetectors in various fields has gradually emerged, and several studies in this area are therefore being conducted. For photodetectors to be used in various environments, their transparency, flexibility, and durability must be ensured. However, the development of flexible photodetectors based on the current measurement techniques of conventional photodetectors has been difficult owing to the limitations of semiconductor materials. In this study, a new type of flexible and transparent capacitive photodetector was fabricated to address the shortcomings of conventional photodetectors. In addition, by introducing graphene electrodes to a new type of manufactured photodetector, devices with excellent overall chemical, thermal, and mechanical durability have been developed. Compared to photodetectors based on pristine Ag nanowire (AgNW) electrodes, AgNW/graphene hybrid electrode-based photodetectors exhibit a 20% higher photosensitivity. Also, the hybrid AgNW/graphene electrode on the dielectric layer exhibited low sheet resistance (~ 8 Ω/sq) and relatively high transmittance (~ 45%).

Highly Stabilized Flexible Transparent Capacitive Photodetector Based on Silver Nanowire/Graphene Hybrid Electrodes

2021 ◽  
Author(s):  
Yooji Hwang ◽  
Young Hyun Hwang ◽  
Kwang Wook Choi ◽  
Seungwon Lee ◽  
Soo Jong Park ◽  
...  
Keyword(s):  
Sheet Resistance ◽  
Dielectric Layer ◽  
Measurement Techniques ◽  
Current Measurement ◽  
Silver Nanowire ◽  
Semiconductor Materials ◽  
Graphene Electrode ◽  
Mechanical Durability ◽  
New Type ◽  
Ag Nanowire

Abstract The need for photodetectors in various fields has gradually emerged, and several studies in this area are therefore being conducted. For photodetectors to be used in various environments, their transparency, flexibility, and durability must be ensured. However, the development of flexible photodetectors based on the current measurement techniques of conventional photodetectors has been difficult owing to the limitations of semiconductor materials. In this study, a new type of flexible and transparent capacitive photodetector was fabricated to address the shortcomings of conventional photodetectors. In addition, by introducing graphene electrodes to a new type of manufactured photodetector, devices with excellent overall chemical, thermal, and mechanical durability have been developed. Compared to photodetectors based on pristine Ag nanowire (AgNW) electrodes, AgNW/graphene hybrid electrode-based photodetectors exhibit a 20% higher photosensitivity. Also, the hybrid AgNW/graphene electrode on the dielectric layer exhibited low sheet resistance (~8 W/sq) and relatively high transmittance (~45%).

scholarly journals Effects of Concentration and Spin Speed on the Optical and Electrical Properties of Silver Nanowire Transparent Electrodes

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2219
Author(s):  
Xiaopeng Li ◽  
Jiayue Zhou ◽  
Dejun Yan ◽  
Yong Peng ◽  
Yong Wang ◽  
...  
Keyword(s):  
Sheet Resistance ◽  
Spin Coating ◽  
Figure Of Merit ◽  
Silver Nanowires ◽  
Solution Concentration ◽  
Ethanol Solution ◽  
Silver Nanowire ◽  
Optical And Electrical Properties ◽  
Transparent Electrodes ◽  
Spin Speed

In this paper, silver nanowires (AgNWs) with a diameter of 40 nm and a length of 45 μm were dispersed into an ethanol solution to prepare AgNW solutions with concentrations of 1, 2, and 3 mg/mL, respectively. The AgNW solutions were then deposited on a glass substrate using spin-coating at 1000, 2000, and 3000 rpm for 45 s, respectively, to prepare transparent electrodes. The results showed that the distribution of AgNWs on the substrate increased in density with the increase in the AgNW solution concentration and the decrease in spin speed. The effect of concentration on the distribution of AgNWs was greater than that of the spin speed. The transmittance of each electrode was between 84.19% and 88.12% at 550 nm, the average sheet resistance was between 20.09 and 358.11 Ω/sq, the highest figure of merit (FoM) was 104.42, and the lowest haze value was 1.48%. The electrode prepared at 1000 rpm with a concentration of 2 mg/mL and that prepared at 3000 rpm with a concentration of 3 mg/mL were very similar in terms of the average sheet resistance, transmittance at 550 nm, FoM, and haze value; thus, these two electrodes could be considered equivalent. The haze value of the electrode was positively correlated with the spin speed at low concentration, but that relationship became inverse as the concentration rose. For the AgNWs used in this experiment with an aspect ratio of 1125, the concentration of the AgNW solution should reach at least 2 mg/mL to ensure that the FoM of the electrode is greater than 35.

Photo-induced fabrication of Ag nanowire circuitry for invisible, ultrathin, conformable pressure sensors

2017 ◽  
Vol 5 (38) ◽  
pp. 9986-9994 ◽  
Author(s):  
Chul Jong Han ◽  
Bum-Geun Park ◽  
Min Suk Oh ◽  
Seung-Boo Jung ◽  
Jong-Woong Kim
Keyword(s):  
Polyethylene Terephthalate ◽  
Pressure Sensors ◽  
Silver Nanowire ◽  
Pressure Sensitive ◽  
Nanowire Networks ◽  
Ag Nanowire

An ultrathin, transparent and stretch-compatible (up to 100% strain) pressure sensitive capacitor was achieved by developing a novel photo-induced patterning of silver nanowire networks deposited on a 1.4 μm thick polyethylene terephthalate sheet.

The influence of single layer MoS2 flake on the propagated surface plasmons of silver nanowire

2021 ◽  
Author(s):  
Liu Lu ◽  
Tiantian Zhao ◽  
Lei Chen ◽  
Chenyang Wang ◽  
Zhiqiang Zhou ◽  
...  
Keyword(s):  
Refractive Index ◽  
Single Layer ◽  
High Refractive Index ◽  
Transmission Efficiency ◽  
Silver Nanowire ◽  
Propagation Loss ◽  
Optical Barrier ◽  
Propagation Length ◽  
Simulation Results ◽  
Ag Nanowire

Abstract We demonstrate the enhancement of both excitation and transmission efficiency of the propagated surface plasmon (SP) of Ag nanowire (Ag NW) in hybrid Ag-MoS2 structure by contrasting the SP propagation of the same Ag NW on different substrates including silicon substrate, monolayer MoS2, or partially overlapping the Ag NW on MoS2 flake. The simulation results indicate that with the assistance of MoS2, the leaky radiation of the hybrid plasmonic modes of the H1 and H2 can be prominently suppressed by the high refractive index dielectric layer of the MoS2, which provides an optical barrier blocking the leaky radiation, resulting in the reduced propagation loss. Our work provides a feasible and effective method to enhance the SP propagation length.

scholarly journals Enhancement of the Conductivity and Uniformity of Silver Nanowire Flexible Transparent Conductive Films by Femtosecond Laser-Induced Nanowelding

Nanomaterials ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 673 ◽  
Author(s):  
Youwang Hu ◽  
Chang Liang ◽  
Xiaoyan Sun ◽  
Jianfen Zheng ◽  
Ji’an Duan ◽  
...  
Keyword(s):  
Sheet Resistance ◽  
Welding Process ◽  
High Repetition Rate ◽  
Silver Nanowire ◽  
Silver Nanostructures ◽  
Transparent Conductive Films ◽  
Conductive Films ◽  
Fs Laser ◽  
Mechanical Bending ◽  
Welding Procedure

In order to improve the performance of silver nanowire (AgNW) flexible transparent conductive films (FTCFs), including the conductivity, uniformity, and reliability, the welding of high repetition rate femtosecond (fs) laser is applied in this work. Fs laser irradiation can produce local enhancement of electric field, which induce melting at the gap of the AgNWs and enhance electrical conductivity of nanowire networks. The overall resistivity of the laser-welded AgNW FTCFs reduced significantly and the transparency changed slightly. Meanwhile, PET substrates were not damaged during the laser welding procedure in particular parameters. The AgNW FTCFs can achieve a nonuniformity factor of the sheet resistance as 4.6% at an average sheet resistance of 16.1 Ω/sq and transmittance of 91%. The laser-welded AgNW FTCFs also exhibited excellent reliability against mechanical bending over 10,000 cycles. The welding process may open up a new approach for improvement of FTCFs photoelectric property and can be applied in the fabrication of silver nanostructures for flexible optoelectronic and integration of functional devices.

Free-standing, anti-corrosion, super flexible graphene oxide/silver nanowire thin films for ultra-wideband electromagnetic interference shielding

2021 ◽  
Author(s):  
Hui Jia ◽  
Xiao Yang ◽  
Qing-Qiang Kong ◽  
Li-Jing Xie ◽  
Quan-Gui Guo ◽  
...  
Keyword(s):  
Thin Films ◽  
Graphene Oxide ◽  
Self Assembly ◽  
Electromagnetic Interference ◽  
Silver Nanowire ◽  
Ultra Wideband ◽  
Electromagnetic Interference Shielding ◽  
Free Standing ◽  
Emi Se ◽  
Ag Nanowire

A free-standing graphene oxide/Ag nanowire film with a dense sandwich-like structure was fabricated via vacuum-assisted self-assembly. The EMI SE is up to 62 dB when the thickness is merely 8 μm in 8–40 GHz. The corresponding specific SE (EMI SE/t) is up to 77 500 dB cm−1.

scholarly journals Directed self-assembly of rhombic carbon nanotube nanomesh films for transparent and stretchable electrodes

2015 ◽  
Vol 3 (10) ◽  
pp. 2319-2325 ◽  
Author(s):  
Sehee Ahn ◽  
Ayoung Choe ◽  
Jonghwa Park ◽  
Heesuk Kim ◽  
Jeong Gon Son ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Sheet Resistance ◽  
Self Assembly ◽  
Lower Sheet ◽  
Mechanical Durability ◽  
Lower Sheet Resistance ◽  
Nanotube Films

Directed self-assembly of carbon nanotubes into 2D rhombic nanomesh films results in greatly lower sheet resistance, higher stretchability, and better mechanical durability than those of random carbon nanotube films.

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