Optically Transparent Metamaterial Absorber Using Inkjet Printing Technology

An optically transparent metamaterial absorber that can be obtained using inkjet printing technology is proposed. In order to make the metamaterial absorber optically transparent, an inkjet printer was used to fabricate a thin conductive loop pattern. The loop pattern had a width of 0.2 mm and was located on the top surface of the metamaterial absorber, and polyethylene terephthalate films were used for fabricating the substrate. An optically transparent conductive indium tin oxide film was introduced in the bottom ground plane. Therefore, the proposed metamaterial absorber was optically transparent. The metamaterial absorber was demonstrated by performing a full-wave electromagnetic simulation and measured in free space. In the simulation, the 90% absorption bandwidth ranged from 26.6 to 28.8 GHz, while the measured 90% absorption bandwidth was 26.8–28.2 GHz. Therefore, it is successfully demonstrated by electromagnetic simulation and measurement results.

Download Full-text

Inkjet-Printed Highly Conductive Poly(3,4-ethylenedioxythiophene): Poly(styrenesulfonate) Electrode for Organic Light-Emitting Diodes

Micromachines ◽

10.3390/mi12080889 ◽

2021 ◽

Vol 12 (8) ◽

pp. 889

Author(s):

Yadong Liu ◽

Juxuan Xie ◽

Lihui Liu ◽

Kai Fan ◽

Zixuan Zhang ◽

...

Keyword(s):

Inkjet Printing ◽

Indium Tin Oxide ◽

Light Emitting Diode ◽

Low Cost ◽

Large Area ◽

Printing Technology ◽

Light Emitting ◽

Drop On Demand ◽

Organic Light ◽

Inkjet Printing Technology

Recently, inkjet printing technology has attracted much attention due to the advantages of drop-on-demand deposition, low-cost and large-area production for organic light-emitting diode (OLED) displays. However, there are still some problems in industrial production and practical application, such as the complexity of ink modulation, high-quality films with homogeneous morphology, and the re-dissolution phenomenon at interfaces. In this work, a printable poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS) ink is developed and obtains an adjustable viscosity. Finally, a patterned PEDOT:PSS electrode is fabricated by inkjet printing, and achieves a high conductivity of 1213 S/cm, a transparency of 86.8% and a uniform morphology without coffee-ring effect. Furthermore, the vacuum-evaporated and solution-processed OLEDs are fabricated based on this electrode and demonstrate a current efficiency of 61 cd/A, which is comparable to that of the indium tin oxide counterpart. This work confirms the feasibility of inkjet printing technology to prepare patterned electrodes and expects that it can be used to fabricate highly efficient optoelectronic devices.

Download Full-text

Polarization Insensitive, Wide-Angle, Ultra-wideband, Flexible, Resistively Loaded, Electromagnetic Metamaterial Absorber using Conventional Inkjet-Printing Technology

Scientific Reports ◽

10.1038/s41598-019-48761-6 ◽

2019 ◽

Vol 9 (1) ◽

Cited By ~ 11

Author(s):

Stylianos D. Assimonis ◽

Vincent Fusco

Keyword(s):

Inkjet Printing ◽

Metamaterial Absorber ◽

Ultra Wideband ◽

Wide Angle ◽

Printing Technology ◽

Polarization Insensitive ◽

Inkjet Printing Technology

Download Full-text

Flexible subterahertz metamaterial absorber fabrication using inkjet printing technology

Applied Physics B ◽

10.1007/s00340-016-6482-0 ◽

2016 ◽

Vol 122 (7) ◽

Cited By ~ 12

Author(s):

Dongju Lee ◽

Hyuk-Kee Sung ◽

Sungjoon Lim

Keyword(s):

Inkjet Printing ◽

Metamaterial Absorber ◽

Printing Technology ◽

Inkjet Printing Technology

Download Full-text

A Systematic Approach for the Design, Fabrication, and Testing of Microstrip Antennas Using Inkjet Printing Technology

ISRN Communications and Networking ◽

10.5402/2012/132465 ◽

2012 ◽

Vol 2012 ◽

pp. 1-11 ◽

Cited By ~ 11

Author(s):

Yahiea Al-Naiemy ◽

Taha A. Elwi ◽

Haider R. Khaleel ◽

Hussain Al-Rizzo

Keyword(s):

Inkjet Printing ◽

Systematic Approach ◽

Microstrip Antennas ◽

Optimal Number ◽

Curing Temperature ◽

Printing Technology ◽

Simulation Tools ◽

High Frequency Structure Simulator ◽

Full Wave ◽

Inkjet Printing Technology

We present a systematic approach for producing microstrip antennas using the state-of-the-art-inkjet printing technique. An initial antenna design based on the conventional square patch geometry is adopted as a benchmark to characterize the entire approach; the procedure then could be generalized to different antenna geometries and feeding techniques. For validation purposes, the antenna is designed and simulated using two different 3D full-wave electromagnetic simulation tools: Ansoft’s High Frequency Structure Simulator (HFSS), which is based on the Finite Element Method (FEM), and CST Microwave Studio, which is based on the Finite Integration Technique (FIT). The systematic approach for the fabrication process includes the optimal number of printed layers, curing temperature, and curing time. These essential parameters need to be optimized to achieve the highest electrical conductivity, trace continuity, and structural robustness. The antenna is fabricated using Inkjet Printing Technology (IJPT) utilizing Sliver Nanoparticles (SNPs) conductive ink printed by DMP-2800 Dimatix FujiFilm materials printer.

Download Full-text