Theoretical Study of Metal-Insulator-Metal Tunneling Diode Figures of Merit

Hashem, Islam E.; Rafat, Nadia H.; Soliman, Ezzeldin A.

doi:10.1109/jqe.2012.2228166

Cited by 47 publications

(29 citation statements)

References 25 publications

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“…Eliasson 165 developed a comprehensive model to predict rectification efficiency, tunneling transmission probability and estimation of device resistance in thin MIM diodes, with the exception of image forces and effective mass. Recently Hashem et al 192 developed more accurate models to simulate the I-V curves and figures of merit of MIM devices. The model can be used for multiple insulator layers, whereas Simmons model is only limited to single insulator predictions.…”

Section: Modelling Approachesmentioning

confidence: 99%

“…A recent patent 209 proposes the use of a triple-insulator barrier which adds further complexity to the fabrication process. The models created by Hashem et al 192 will help identify which material systems to concentrate experimental efforts on. Improved performance from multiple barrier tunnel diodes is yet to be realised but the few reports that exist suggest significant potential.…”

Section: Metal-insulator-insulator-metal Diodesmentioning

confidence: 99%

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The rectenna device: From theory to practice (a review)

Donchev

Pang

Gammon

et al. 2014

MRS Energy & Sustainability

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The Rectenna (RECTifying antENNA), which was first demonstrated by William C. Brown in 1964 as a receiver for microwave power transmission, is now increasingly researched as a means of harvesting solar radiation. Tapping into the growing photovoltaic market, the attraction of the rectenna concept is the potential for devices that, in theory, are not limited in efficiency by the Shockley-Queisser limit. In this review, the history and operation of this 40-year old device concept is explored in the context of power transmission and the ever increasing interest in its potential applications at THz frequencies, through the infra-red and visible spectra. Recent modelling approaches that have predicted controversially high efficiency values at these frequencies are critically examined. It is proposed that to unlock any of the promised potential in the solar rectenna concept, there is a need for each constituent part to be improved beyond the current best performance, with the existing nanometer scale antennas, the rectification and the impedance matching solutions all falling short of the necessary efficiencies at THz frequencies. Advances in the fabrication, characterisation and understanding of the antenna and the rectifier are reviewed, and common solar rectenna design approaches are summarised. Finally, the socio-economic impact of success in this field is discussed and future work is proposed.

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Section: Modelling Approachesmentioning

confidence: 99%

Section: Metal-insulator-insulator-metal Diodesmentioning

confidence: 99%

The rectenna device: From theory to practice (a review)

Donchev

Pang

Gammon

et al. 2014

MRS Energy & Sustainability

View full text Add to dashboard Cite

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“…Trials have been performed to improve its accuracy by introducing a linear potential barrier increase inside the cell instead of a constant value [55], as shown in Figure 7b. This can also be referred to as the Airy function transfer matrix method (AF-TMM) [56], which gives identical results to that obtained by the NEGF algorithm as stated by Hashem et al [56] for their model.…”

Section: Transfer Matrix Methodmentioning

confidence: 60%

“…Even so, its performance is superior to that of WKB in particular for low barrier MIM diodes [47]. Another added value for this method is its adaptability to simulate multi-insulator diodes as shown by Hashem et al [56]. Moreover, the algorithm simulation output is in close agreement with the more computer-intensive algorithms such as the quantum transmitting boundary method (QTBM) [47] and the non-equilibrium Green function method (NEGF) [56], which will be encountered later on.…”

Section: Transfer Matrix Methodmentioning

confidence: 99%

“…The algorithm is frequently quoted for its accuracy [56,62]. An outstanding feature of this modeling scheme is that it can be applicable to "uniform illumination" as stated by Datta and Anantram [63] where the oscillating field is expressed as V(z, t) = V(t) = V 0 cos (ωt) or if it takes a phase-dependent form, such that V(z, t) ∼ V 0 cos (ωt − qz).…”

Section: Non-equilibrium Green Functionmentioning

confidence: 99%

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THz Rectennas and Their Design Rules

2017

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Abstract:The increasing demand for more efficient energy harvesting solutions has urged research for better harvesting solutions than the presently-available ones. While p-n junction solar cells have become commercially widespread, they are expensive and suffer from poor efficiency figures hardly reaching 20%. Other radiation-electricity converters such as rectennas have a theoretical limit in excess of 80%. However, no efficient rectenna solution for the terahertz frequency band has been commercialized or presented in the academic literature. In fact, there are many obstructions to an efficient solution. The aim of this paper is to address the key points towards an efficient and commercially-available solution by briefly reviewing the relevant literature and so identifying five factors that should be addressed in order to reach an efficient solution.

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Nanoscale Film Thickness Gradients Printed in Open Air by Spatially Varying Chemical Vapor Deposition

Alshehri

Loke

Nguyễn

et al. 2021

Adv Funct Materials

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Nanoscale films are integral to all modern electronics. To optimize device performance, researchers vary the film thickness by making batches of devices, which is time‐consuming and produces experimental artifacts. Thin films with nanoscale thickness gradients that are rapidly deposited in open air for combinatorial and high‐throughput (CHT) studies are presented. Atmospheric pressure spatial atomic layer deposition reactor heads are used to produce spatially varying chemical vapor deposition rates on the order of angstroms per second. ZnO and Al2O3 films are printed with nm‐scale thickness gradients in as little as 45 s and CHT analysis of a metal‐insulator‐metal diode and perovskite solar cell is performed. By testing 360 Pt/Al2O3/Al diodes with 18 different Al2O3 thicknesses on one wafer, a thicker insulator layer (≈7.0 nm) is identified for optimal diode performance than reported previously. Al2O3 thin film encapsulation is deposited by atmospheric pressure chemical vapor deposition (AP‐CVD) on a perovskite solar cell stack for the first time and a convolutional neural network is developed to analyze the perovskite stability. The rapid nature of AP‐CVD enables thicker films to be deposited at a higher temperature than is practical with conventional methods. The CHT analysis shows enhanced stability for 70 nm encapsulation films.

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Theoretical Study of Metal-Insulator-Metal Tunneling Diode Figures of Merit

Cited by 47 publications

References 25 publications

The rectenna device: From theory to practice (a review)

The rectenna device: From theory to practice (a review)

THz Rectennas and Their Design Rules

Nanoscale Film Thickness Gradients Printed in Open Air by Spatially Varying Chemical Vapor Deposition

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