scholarly journals Optically Transparent and Highly Conductive Electrodes for Acousto-Optical Devices

Materials ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 7178
Author(s):  
Alexey Osipkov ◽  
Mstislav Makeev ◽  
Elizaveta Konopleva ◽  
Natalia Kudrina ◽  
Leonid Gorobinskiy ◽  
...  
Keyword(s):  
Chemical Deposition ◽  
Transparent Electrode ◽  
Light Transmittance ◽  
High Q ◽  
Transparent Substrate ◽  
Ion Plasma ◽  
Visible Wavelength Range ◽  
Reasonable Choice ◽  
Silver Mirror Reaction ◽  
Mesh Structures

The study was devoted to the creation of transparent electrodes based on highly conductive mesh structures. The analysis and reasonable choice of technological approaches to the production of such materials with a high Q factor (the ratio of transparency and electrical conductivity) were carried out. The developed manufacturing technology consists of the formation of grooves in a transparent substrate by photolithography methods, followed by reactive ion plasma etching and their metallization by chemical deposition using the silver mirror reaction. Experimental samples of a transparent electrode fabricated using this technology have a sheet resistance of about 0.1 Ω/sq with a light transmittance in the visible wavelength range of more than 60%.

New Transparent Substrate with Silica Aerogel Film for Surface-Emissive Devices

2000 ◽  
Vol 660 ◽  
Author(s):  
H. Yokogawa ◽  
K. Kawano ◽  
M. Yokoyama ◽  
T. Tsutsui ◽  
M. Yahiro ◽  
...  
Keyword(s):  
Refractive Index ◽  
Glass Substrate ◽  
Silica Aerogel ◽  
Sol Gel ◽  
Supercritical Drying ◽  
Transparent Electrode ◽  
Light Sources ◽  
Photoluminescence Intensity ◽  
Transparent Substrate ◽  
Low Refractive Index

ABSTRACTSilica aerogels prepared by sol-gel methods with supercritical drying process have transparency and extremely low refractive index which is not available in any other materials. This extraordinary refractivity is expected to present some new features as an optical material. Ordinarily, coupling-out efficiency of surface-emissive light sources has been assumed to be low. It is due to the losses organized from internal reflection of emitted light at the air-glass interface and dissipation during wave-guiding propagation within the substrate.However, when material that has extremely low refractive index is inserted between a thin luminescence layer and glass substrate, almost all the light from the luminescence layer can efficiently couple out to air passing through the glass substrate. In this report, we introduce a silica aerogel film as a low refractive index material for surface-emissive devices, such as photoluminescent and electroluminescent device. In the experiments, the photoluminescence intensity of Alq3 through the silica aerogel layer was twice as large as that of the glass substrate without the silica aerogel film. Moreover, we formed a new substrate which contained a transparent electrode on the silica aerogel film. Using this substrate, we fabricated the OLED and observed the disappearance of wave-guiding propagation within the glass substrate.

Optical Methods for Studying the Drying Dynamics of Fe2O3 Nanocolloid Droplets Depending on Variation of Substrate Temperature

2015 ◽  
Vol 789-790 ◽  
pp. 33-37
Author(s):  
Alexander Dmitriev ◽  
Petr Makarov
Keyword(s):  
Light Intensity ◽  
Lower Layer ◽  
Transmitted Light ◽  
Optical Methods ◽  
Light Transmittance ◽  
Quality Level ◽  
Transparent Substrate ◽  
Single Temperature ◽  
Water Drops ◽  
Shaped Pattern

This work is devoted to investigation of the way light transmittance of drying drop of Fe2O3 nanocolloid deposited on flat surface changes as liquid evaporates. According to results of transmitted light intensity measuring it is assumed that drying process can be divided into separate stages each being characterized by particular quality level of ability to transmit light because of different behavior and, thus, density of suspended nanoparticles inside the droplet. The last stage ends by forming of a ring-shaped pattern (known as “coffee ring”). Temperature of the surface was being changed by applying a varying potential difference to lower layer of transparent substrate made of ITO. Time dependences of integral transmitted light intensity for every single temperature are represented in graphs. They are compared with dependences for water drops of the same volume.

scholarly journals High Q-Factor Hybrid Metamaterial Waveguide Multi-Fano Resonance Sensor in the Visible Wavelength Range

Nanomaterials ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1583
Author(s):  
Hongyan Yang ◽  
Yupeng Chen ◽  
Mengyin Liu ◽  
Gongli Xiao ◽  
Yunhan Luo ◽  
...  
Keyword(s):  
Quality Factor ◽  
Wavelength Range ◽  
Fano Resonance ◽  
Q Factor ◽  
High Q ◽  
Visible Wavelength ◽  
Metamaterial Waveguide ◽  
Visible Wavelength Range ◽  
Resonance Sensor ◽  
Hybrid Metamaterial

We propose a high quality-factor (Q-factor) multi-Fano resonance hybrid metamaterial waveguide (HMW) sensor. By ingeniously designing a metal/dielectric hybrid waveguide structure, we can effectively tailor multi-Fano resonance peaks’ reflectance spectrum appearing in the visible wavelength range. In order to balance the high Q-factor and the best Fano resonance modulation depth, numerical calculation results demonstrated that the ultra-narrow linewidth resolution, the single-side quality factor, and Figure of Merit (FOM) can reach 1.7 nm, 690, and 236, respectively. Compared with the reported high Q-value (483) in the near-infrared band, an increase of 30% is achieved. Our proposed design may extend the application of Fano resonance in HMW from mid-infrared, terahertz band to visible band and have important research value in the fields of multi-wavelength non-labeled biosensing and slow light devices.

scholarly journals Research Progress of Transparent Electrode Materials with Sandwich Structure

Materials ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4097
Author(s):  
Li-Hao Qin ◽  
Yong-Qi Yan ◽  
Gan Yu ◽  
Zhao-Yi Zhang ◽  
Tuofu Zhama ◽  
...  
Keyword(s):  
Sheet Resistance ◽  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Electrode Materials ◽  
Electronic Devices ◽  
Clean Energy ◽  
Transparent Electrode ◽  
Light Transmittance ◽  
Research Progress ◽  
Fossil Energy

The nonrenewable nature of fossil energy has led to a gradual decrease in reserves. Meanwhile, as society becomes increasingly aware of the severe pollution caused by fossil energy, the demand for clean energy, such as solar energy, is rising. Moreover, in recent years, electronic devices with screens, such as mobile phones and computers, have had increasingly higher requirements for light transmittance. Whether in solar cells or in the display elements of electronic devices, transparent conductive films directly affect the performance of these devices as a cover layer. In this context, the development of transparent electrodes with low sheet resistance and high light transmittance has become one of the most urgent issues in related fields. At the same time, conventional electrodes can no longer meet the needs of some of the current flexible devices. Because of the high sheet resistance, poor light transmittance, and poor bending stability of the conventional tin-doped indium tin oxide conductive film and fluorine-doped tin oxide transparent conductive glass, there is a need to find alternatives with better performance. In this article, the progress of research on transparent electrode materials with sandwich structures and their advantages is reviewed according to the classification of conductive materials to provide reference for research in related fields.

scholarly journals Fabrication of Screen Printing-Based AgNWs Flexible Transparent Conductive Film with High Stability

Micromachines ◽  
2020 ◽  
Vol 11 (12) ◽  
pp. 1027
Author(s):  
Jianjun Yang ◽  
Wei Zeng ◽  
Yaxin Li ◽  
Zichuan Yi ◽  
Guofu Zhou
Keyword(s):  
Screen Printing ◽  
High Stability ◽  
Large Scale ◽  
Silver Nanowires ◽  
Low Cost ◽  
Optical Microscope ◽  
Light Transmittance ◽  
Large Area ◽  
Transparent Substrate ◽  
Conductive Thin Films

Flexible transparent conductive thin films (TCFs) prepared from Silver nanowires (AgNWs) have attractive features of low cost, flexibility, and solution-processed, but the usual manufacturing methods could still be hard to be scaled up. In addition, large-scale/large-area fabrication process with industrialized potential is strongly needed. In this paper, the flexible TCFs with high stability are obtained via using screen printing method to print the AgNWs inks on a flexible and transparent substrate. The micro-structure of the AgNWs patterns is investigated by optical microscope and scanning electron microscope. Furthermore, the sheet resistance, light transmittance, and film thickness of the AgNWs patterns prepared under different conditions are characterized to explore the influence of different factors on its optical and electrical properties.

Characteristics of AZO thin films prepared at various Al target input current deposited on PET substrate

2015 ◽  
Vol 29 (06n07) ◽  
pp. 1540027
Author(s):  
Yun-Hae Kim ◽  
Chang-Wook Park ◽  
Jin-Woo Lee ◽  
Dong Myung Lee
Keyword(s):  
Indium Tin Oxide ◽  
Electrode Materials ◽  
Visible Spectrum ◽  
Transparent Conductive Oxide ◽  
Transparent Electrode ◽  
Input Current ◽  
Light Transmittance ◽  
Environmental Pollution Problem ◽  
Materials Used ◽  
Pet Substrate

Transparent conductive oxide is a thin film to be used in numerous applications throughout the industry in general. Transparent electrode materials used in these industries are in need of light transmittance with excellent high and low electrical characteristics, substances showing the most excellent physical properties while satisfying all the characteristics such as indium tin oxide film. However, reserves of indium are very small, there is an environmental pollution problem. So the study of zinc oxide ( ZnO ) is actively carried out in an alternative material. This study analyzed the characteristics by using a direct current (DC) magnetron sputtering system. The electric and optical properties of these films were studied by Hall measurement and optical spectroscopy, respectively. When the Al target input current is 2 mA and 4 mA, it demonstrates about 80% transmittance in the range of the visible spectrum. Also, when Al target input current was 6 mA, sheet resistance was the smallest on PET substrate. The minimum resistivity is 3.96×10-3 ohm/sq.

scholarly journals On-screen fingerprint sensor with optically and electrically tailored transparent electrode patterns for use on high-resolution mobile displays

2020 ◽  
Vol 6 (1) ◽  
Author(s):  
Hyun-Joon Kim-Lee ◽  
Seog Woo Hong ◽  
Dong Kyun Kim ◽  
Jinmyoung Kim ◽  
Hong Suk Kim ◽  
...  
Keyword(s):  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Transparent Electrode ◽  
Transparent Conductor ◽  
Visible Wavelength Range ◽  
Unit Block ◽  
Signal Sensitivity ◽  
Full Screen ◽  
Fingerprint Sensor ◽  
Display Quality

Abstract In this study, a mutual capacitive-type on-screen fingerprint sensor, which can recognize fingerprints on a display screen to provide smartphones with full-screen displays with a minimal bezel area, is fabricated. On-screen fingerprint sensors are fabricated using an indium tin oxide transparent conductor with a sheet resistance of ~10 Ω/sq. and a transmittance of ~94% (~86% with the substrate effect) in the visible wavelength range, and assembled onto a display panel. Even at this high transmittance, the electrodes can degrade the display quality when they are placed on the display. The interference between periodic display pixel arrays and sensor patterns can lead to the Moiré phenomenon. It is necessary to find an appropriate sensor pattern that minimizes the Moiré pattern, while maintaining the signal sensitivity. To search for appropriate patterns, a numerical calculation is carried out over wide ranges of pitches and rotation angles. The range is narrowed for an experimental evaluation, which is used to finally determine the sensor design. As the selected sensor pitches are too small to detect capacitance variations, three unit patterns are electrically connected to obtain a unit block generating a larger signal. By applying the selected sensor pattern and circuit driving by block, fingerprint sensing on a display is demonstrated with a prototype built on a commercial smartphone.

Electroluminescent structures printed on paper and textile elastic substrates

Circuit World ◽  
2014 ◽  
Vol 40 (1) ◽  
pp. 13-16 ◽  
Author(s):  
Marcin Sloma ◽  
Daniel Janczak ◽  
Grzegorz Wroblewski ◽  
Anna Mlozniak ◽  
Malgorzata Jakubowska
Keyword(s):  
Carbon Nanotubes ◽  
Design Methodology ◽  
Screen Printing ◽  
Spray Coating ◽  
Transparent Electrode ◽  
Content Type ◽  
Transparent Substrate ◽  
Elastic Substrates ◽  
Graphene Platelets ◽  
Polymer Foils

Purpose – New types of substrates were used for fabrication of printed electroluminescent structures. Polymer foils mainly used as substrates for such optoelectronic elements were replaced with paper and textiles. Printing on non-transparent substrate requires elaboration of printed transparent electrode, while usually polyester foils with sputtered ITO transparent electrodes are used. The paper aims to discuss these issues. Design/methodology/approach – Electroluminescent structures were fabricated with elaborated polymer compositions filled with nanomaterials, such as carbon nanotubes and graphene platelets, dielectric and luminophore nanopowders. Structures were printed as “reverse stack”, where transparent electrode is printed on top of the last luminophore layer. For that carbon nanotubes and graphene platelets filled composition was used, deposited with spray-coating technique. Findings – Main issue with new substrates is proper wetting with the use of screen-printing pastes, and much higher roughness especially for textiles. Originality/value – Fully functional structures were obtained, but several disadvantages were observed that needs to be eliminated in further studies.

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