scholarly journals Modifying Precursor Solutions to Obtain Screen-Printable Inks for Tungsten Oxides Electrochromic Film Preparation

Coatings ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 872
Author(s):  
Kaiyue Guo ◽  
Guanguang Zhang ◽  
Yujie Long ◽  
Honglong Ning ◽  
Zhuohui Xu ◽  
...  
Keyword(s):  
Screen Printing ◽  
Low Cost ◽  
Wide Bandgap ◽  
Electrochromic Device ◽  
Electrochromic Devices ◽  
Tungsten Oxides ◽  
Screen Printing Method ◽  
Coloration Efficiency ◽  
Wide Bandgap Semiconductor

Tungsten trioxide (WO3) is used to prepare the important electrochromic layer of the electrochromic device as a wide bandgap semiconductor material. In this study, WO3 electrochromic film was successfully prepared by screen printing. To modify the thixotropy and wettability of the ink, polyvinyl alcohol (PVA) and 2-perfluoroalkyl ethanol (FSO) were added in the ammonium meta-tungstate (AMT) solution. We found that the PVA additive could improve the dynamic viscosity of the solution and modify the uniformity of the film. 2-Perfluoroalkyl ethanol (FSO) could lower the surface tension and increase the wettability of the AMT solution on the substrate. By observing the morphology of the printed films, the ink formulas for screen printing were selected. We found the annealing process could help remove PVA. Through characterization of electrochromic performance, it was found that the best performing device had 42.57% modulation and 93.25 cm2·C−1 coloration efficiency (CE) for 600 nm light. This study showed great potential in the preparation of WO3 electrochromic devices by a low-cost screen-printing method.

Surface Characterization of Silicon Carbide Following Shallow Implantation of Palladium Ions

2005 ◽  
Vol 900 ◽  
Author(s):  
Claudiu I. Muntele ◽  
Sergey Sarkisov ◽  
Iulia Muntele ◽  
Daryush Ila
Keyword(s):  
Silicon Carbide ◽  
Surface Characterization ◽  
Wide Bandgap ◽  
Electrical Contacts ◽  
Temperature Dependent ◽  
Wide Bandgap Semiconductor ◽  
Hydrogen Sensing ◽  
Fast Switching ◽  
Sensing Applications

ABSTRACTSilicon carbide is a promising wide-bandgap semiconductor intended for use in fabrication of high temperature, high power, and fast switching microelectronics components running without cooling. For hydrogen sensing applications, silicon carbide is generally used in conjunction with either palladium or platinum, both of them being good catalysts for hydrogen. Here we are reporting on the temperature-dependent surface morphology and depth profile modifications of Au, Ti, and W electrical contacts deposited on silicon carbide substrates implanted with 20 keV Pd ions.

scholarly journals Comparative Study of Growth Morphologies of Ga2O3 Nanowires on Different Substrates

Nanomaterials ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1920
Author(s):  
Badriyah Alhalaili ◽  
Ruxandra Vidu ◽  
Howard Mao ◽  
M. Saif Islam
Keyword(s):  
Gallium Oxide ◽  
Catalyst Layer ◽  
Wide Bandgap ◽  
Nanowire Growth ◽  
Si Substrate ◽  
Wide Bandgap Semiconductor ◽  
Si Substrates ◽  
Silver Catalysts ◽  
Elemental Characterization

Gallium oxide (Ga2O3) is a new wide bandgap semiconductor with remarkable properties that offers strong potential for applications in power electronics, optoelectronics, and devices for extreme conditions. In this work, we explore the morphology of Ga2O3 nanostructures on different substrates and temperatures. We used silver catalysts to enhance the growth of Ga2O3 nanowires on substrates such as p-Si substrate doped with boron, 250 nm SiO2 on n-Si, 250 nm Si3N4 on p-Si, quartz, and n-Si substrates by using a thermal oxidation technique at high temperatures (~1000 °C) in the presence of liquid silver paste that served as a catalyst layer. We present the results of the morphological, structural, and elemental characterization of the Ga2O3 nanostructures. This work offers in-depth explanation of the dense, thin, and long Ga2O3 nanowire growth directly on the surfaces of various types of substrates using silver catalysts.

scholarly journals Flexible, textronic temperature sensors, based on carbon nanostructures

2014 ◽  
Vol 62 (4) ◽  
pp. 759-763 ◽  
Author(s):  
S. Walczak ◽  
M. Sibiński
Keyword(s):  
Carbon Nanostructures ◽  
Screen Printing ◽  
Large Scale ◽  
Low Cost ◽  
Temperature Sensors ◽  
Wearable Electronics ◽  
Temperature Coefficient Of Resistance ◽  
Electronic Products ◽  
Screen Printing Method ◽  
Consumer Electronic

Abstract The paper presents a comparative analysis of two types of flexible temperature sensors, made of carbon-based nanostructures composites. These sensors were fabricated by a low-cost screen-printing method, which qualifies them to large scale, portable consumer electronic products. Results of examined measurements show the possibility of application for thick film devices, especially dedicated to wearable electronics, also known as a textronics. Apart from general characterisation, the influence of technological processes on specific sensor parameters were examined, particulary the value of the temperature coefficient of resistance (TCR) and its stability during the device bending.

Dispersion of Glass Powder and Characterization of Thick Film for AC Plasma Display Panels

2007 ◽  
Vol 124-126 ◽  
pp. 355-358
Author(s):  
Kwan Wuk Park ◽  
Jin Seok Lee ◽  
Hee Jin Lim ◽  
Sung Churl Choi
Keyword(s):  
Screen Printing ◽  
Phosphate Ester ◽  
Organic Additives ◽  
Forming Process ◽  
Screen Printing Method ◽  
Thermal Gravimetric Analyzer ◽  
Plasma Display Panels ◽  
Plasma Display ◽  
Practical Forming

Bi-based glass pastes were prepared in the mixed organic solvents (α-terpineol and texanol) with different kinds and concentrations of organic dispersant such as fish oil , phosphate ester and poly methyl methacrylate (PMMA). The rheological stability of glass pastes was characterized by using a rheometer and adsorption behavior of organic additives for the glass powders was carried out by using a thermal gravimetric analyzer (TGA).The Bi-based glass pastes exhibited the most stable rheological behavior at an addition of phosphate ester of 0.5 in mass %, due to the steric repulsive force acting on the surface of glass powers with adsorbing the organic additives. This study allowed significant delay of the sedimentation time and suppressed generation of micropores during practical forming process by a screen printing method.

Preparation and Characterization of Copper-Doped Tin Oxide Nanopowder via Hydrothermal Route

2006 ◽  
Vol 45 ◽  
pp. 200-204
Author(s):  
Dong Xiang Zhou ◽  
Huan Liu ◽  
Shu Ping Gong
Keyword(s):  
Tin Oxide ◽  
Screen Printing ◽  
High Sensitivity ◽  
Average Crystallite Size ◽  
Test Results ◽  
Hydrothermal Route ◽  
Screen Printing Method ◽  
Sensor Fabrication ◽  
Printing Method

Copper-doped tin oxide nanopowder has been synthesized via the hydrothermal route, in which pure metallic Sn, diluted nitric acid solution and Cu(NO3)2 are used as the starting materials. The hydrothermal treatment at about 200°C for 10 h results in rutile crystalline SnO2 particles with a narrow size distribution typically in the range of 3~6 nm. The average crystallite size of 5 wt% CuO-doped SnO2 particles remains smaller than 12.5 nm even after annealing at 800°C. The evaluation of the sensitive properties of the synthesized powder with various amount of CuO doping is conducted on the thick-film samples fabricated by screen-printing method. The high sensitivity toward H2S as shown by the sensor test results show the possibility of using this material for gas sensor fabrication.

scholarly journals Effect of thickness Type on Transparent TiO2 as the Working Electrode of Dye sensitized Solar Cell (DSSC) for Solar Windows Applications

2017 ◽  
Vol 6 (02) ◽  
pp. 73 ◽  
Author(s):  
Nadya Aruma Dewi ◽  
Fahru Nurosyid ◽  
Agus Supriyanto ◽  
Risa Suryana
Keyword(s):  
Screen Printing ◽  
Test Results ◽  
Electrode Thickness ◽  
Screen Printing Method ◽  
Dye Sensitized ◽  
Maximum Value ◽  
Dye Solar Cells ◽  
Uv Visible ◽  
Windows Applications

<p align="center"> </p><p>Senditized Dye Solar Cells (DSSC) consist of photoelectrode, dye, electrolyte and counter electrode which is one of the photochemical electric cells. In this article will discuss the influence of the thickness of the electrode on the electrical properties. Electrodes made by screen printing method. Screen by type T-49. TiO<sub>2</sub> deposited on the FTO variation of the number of layers to obtain a thickness of 1, 2, 3 and 4. DSSC tested thickness by Screen Electron Microscopy (SEM), absorbance test by UV Visible Lambda 25 and characterization of current and voltage test by Keithley Measurenment 2602A. The test results showed the thickness of the TiO<sub>2</sub> electrode thickness (1.5 ± 0.2) μm, (2.9 ± 0.5) μm, (3.5 ± 0.6) μm, and (4.5 ± 0.8 ) μm. Based on the test results absorbance maximum value contained in thickness (4.5 ± 0.8) μm having a dye adsorbed at most and have the highest efficiency  2.41%.</p><p> </p>

scholarly journals Characterization of organic solar cells using semiconducting polymers with different bandgaps

2019 ◽  
Vol 39 (7) ◽  
pp. 636-641 ◽  
Author(s):  
Ismail Borazan ◽  
Yasin Altin ◽  
Ali Demir ◽  
Ayse Celik Bedeloglu
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Low Cost ◽  
Wide Bandgap ◽  
Semiconducting Polymers ◽  
Morphological Properties ◽  
Low Bandgap ◽  
Absorbing Layer ◽  
Easy Integration

Abstract Polymer-based organic solar cells are of great interest as they can be produced with low-cost techniques and also have many interesting features such as flexibility, graded transparency, easy integration, and lightness. However, conventional wide bandgap polymers used for the light-absorbing layer significantly affect the power conversion efficiency of organic solar cells because they collect sunlight in a given spectrum range and due to their limited stability. Therefore, in this study, polymers with different bandgaps were used, which could allow for the production of more stable and efficient organic solar cells: P3HT as the wide bandgap polymer, and PTB7 and PCDTBT as low bandgap polymers. These polymers with different bandgaps were combined with PCBM to obtain increased efficiency and optimum photoactive layer in the organic solar cell. The obtained devices were characterized by measuring optical, photoelectrical, and morphological properties. Solar cells using the PTB7 and PCDTBT polymers had more rough surfaces than the reference cell using P3HT. The use of low-bandgap polymers improved Isc significantly, and when combined with P3HT, a higher Voc was obtained.

A simple paper-based analytical device using UV resin screen-printing for the determination of ammonium in soil

2020 ◽  
Vol 12 (38) ◽  
pp. 4649-4656
Author(s):  
Thinikan Thongkam ◽  
Ratana Rungsirisakun ◽  
Khuanjit Hemavibool
Keyword(s):  
Screen Printing ◽  
Low Cost ◽  
Screen Printing Method ◽  
Soil P ◽  
Uv Resin ◽  
Printing Method ◽  
Analytical Device

A convenient and low cost paper-based analytical device (PAD) was developed using an inexpensive UV resin with a screen-printing method for measuring ammonium in soil.

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