scholarly journals High-current density and high-asymmetry MIIM diode based on oxygen-non-stoichiometry controlled homointerface structure for optical rectenna

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Daisuke Matsuura ◽  
Makoto Shimizu ◽  
Hiroo Yugami
Keyword(s):  
Current Density ◽  
Electromagnetic Waves ◽  
High Current Density ◽  
Critical Element ◽  
High Current ◽  
Insulator Layer ◽  
Power Sources ◽  
Wide Range ◽  
Natural Oxide ◽  
High Asymmetry

AbstractOptical rectennas are expected to be applied as power sources for energy harvesting because they can convert a wide range of electromagnetic waves, from visible light to infrared. The critical element in these systems is a diode, which can respond to the changes in electrical polarity in the optical frequency. By considering trade-off relationship between current density and asymmetry of IV characteristic, we reveal the efficiency limitations of MIM diodes for the optical rectenna and suggest a novel tunnel diode using a double insulator with an oxygen-non-stoichiometry controlled homointerface structure (MOx/MOx−y). A double-insulator diode composed of Pt/TiO2/TiO1.4/Ti, in which a natural oxide layer of TiO1.4 is formed by annealing under atmosphere. The diode has as high-current-density of 4.6 × 106 A/m2, which is 400 times higher than the theoretical one obtained using Pt/TiO2/Ti MIM diodes. In addition, a high-asymmetry of 7.3 is realized simultaneously. These are expected to increase the optical rectenna efficiency by more than 1,000 times, compared to the state-of-the art system. Further, by optimizing the thickness of the double insulator layer, it is demonstrated that this diode can attain a current density of 108 A/m2 and asymmetry of 9.0, which are expected to increase the optical rectenna efficiency by 10,000.

scholarly journals Iron Disulfide Synthesis for Thermal Batteries Applications

2020 ◽  
pp. 50-53 ◽  
Author(s):  
Gabriel Evangelista Medeiros ◽  
Francisco José Moura ◽  
Rodrigo Fernandes Magalhães de Souza
Keyword(s):  
Current Density ◽  
High Current Density ◽  
High Dispersion ◽  
High Current ◽  
Power Sources ◽  
Iron Disulfide ◽  
Thermal Batteries ◽  
Single Discharge ◽  
Emergency Systems ◽  
Charge Discharge

The necessity for ever more efficient and compact power sources drives the development of more durable and more power-intensive sources. Electrochemical sources include primary batteries that support a single discharge cycle and secondary batteries that support a defined number of charge-discharge cycles. Such sources should be suitable for the intended application, such as emergency systems, military and aerospace apparatus, where they must have long shelf life, high current density and reliability. Thermal batteries work with LiCl-KCl eutectic electrolyte anodes and FeS2 cathodes. A pyrometallurgical synthesis route was studied for roasting reaction between Fe2O3 and vaporized sulfur to obtain FeS2. The results obtained showed a conversion close to 90% and a high dispersion of agglomerates sizes, which disaggregated generate particles suitable for cathode manufacturing.

scholarly journals On the effects of geometry on guided electromagnetic waves

2007 ◽  
Vol 34 (1) ◽  
pp. 1-50 ◽  
Author(s):  
Robin Tucker
Keyword(s):  
Electromagnetic Fields ◽  
Current Density ◽  
Electromagnetic Waves ◽  
High Current Density ◽  
Fluid Model ◽  
Back Reaction ◽  
High Current ◽  
Radiation Fields ◽  
Relativistic Fluid

The method of moving (Cartan) coframes is used to analyze the influence of geometry on the behavior of electromagnetic fields in confining guides and the effect of such fields on their ultra-relativistic sources. Such issues are of relevance to a number of topical problems in accelerator science where the need to control the motion of high current-density micro-meter size bunches of relativistic radiating charge remains a technical and theoretical challenge. By dimensionally reducing the exterior equations for the sources and fields on spacetime using symmetries exhibited by the confining guides one achieves a unifying view that offers natural perturbative approaches for dealing with smooth non-uniform and curved guides. The issue of the back-reaction of radiation fields on the sources is approached in terms of a simple charged relativistic fluid model. .

Three-dimensional porous copper-decorated bismuth-based nanofoam for boosting electrochemical reduction of CO2 to formate

2021 ◽  
Author(s):  
Yingchun Zhang ◽  
Changsheng Cao ◽  
Xintao Wu ◽  
Qi-Long Zhu
Keyword(s):  
Current Density ◽  
High Current Density ◽  
Three Dimensional ◽  
Co2 Reduction ◽  
Reduction Reaction ◽  
High Current ◽  
Porous Copper ◽  
Reduction Of Co2 ◽  
Co2 Reduction Reaction ◽  
Wide Potential

Bismuth (Bi)-based nanomaterials are considered as the promising electrocatalysts for electrocatalytic CO2 reduction reaction (CO2RR), but it is challenging to achieve high current density and selectivity in a wide potential...

Cu-Doped Alloy Layer Guiding Uniform Li Deposition on a Li–LLZO Interface under High Current Density

2021 ◽  
Author(s):  
Xia He ◽  
Fei Yan ◽  
Mingyuan Gao ◽  
Yunjing Shi ◽  
Guanglong Ge ◽  
...  
Keyword(s):  
Current Density ◽  
High Current Density ◽  
Alloy Layer ◽  
High Current

Implementation of Trigger Unit for Generation of High-Current-Density Electron Beam

2021 ◽  
pp. 1-6
Author(s):  
Anand Abhishek ◽  
Niraj Kumar ◽  
Udit Narayan Pal ◽  
Bhim Singh ◽  
S. A. Akbar
Keyword(s):  
Electron Beam ◽  
Current Density ◽  
High Current Density ◽  
High Current

A High-Current-Density Electron Beam for Millimeter-Wave Amplifiers

2021 ◽  
pp. 1-5
Author(s):  
Alan M. Cook ◽  
Edward L. Wright ◽  
Khanh T. Nguyen ◽  
Colin D. Joye ◽  
John C. Rodgers ◽  
...  
Keyword(s):  
Electron Beam ◽  
Millimeter Wave ◽  
Current Density ◽  
High Current Density ◽  
High Current
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