An Integrated High-Capacitance Varicap Based on Porous Silicon

Тимошенков, С. П.; Boyko, A. N.; Гаев, Д. С.; Калмыков, Рустам Мухамедович

doi:10.1134/s1063739718070156

Cited by 4 publications

(1 citation statement)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[64,79,80] The capacitance may further be increased by modifying the geometry of the p-n junction. [81] However, most commercially available varactor diodes demonstrate values lower by orders of magnitude. The presented CAPodes, which are based on an asymmetric EDLC, demonstrate specific capacitances of over 104 F g −1 (400 mF cm −2 , macroscopic CAPode) and 3.37 mF cm −2 (printed CAPode, calculated for the entire positive voltage range).…”

Section: Application Of Macroscopic and Printed Capodes As Variable C...mentioning

confidence: 99%

A Precursor‐Derived Ultramicroporous Carbon for Printing Iontronic Logic Gates and Super‐Varactors

Gellrich,

Shupletsov,

Galek

et al. 2024

Advanced Materials

View full text Add to dashboard Cite

We present a liquid precursor for 3D printing ultramicroporous carbons (pore width < 0.7 nm) to create a novel in‐plane capacitive‐analogue of semiconductor‐based diodes (CAPodes). This proof‐of‐concept integrates functional EDLCs into microstructured iontronic devices. The working principle is based on selective ion‐sieving, controlling the size of the electrolyte ions and the nanoporous sieving carbon's pore size. By blocking bulky electrolyte ions from entering the sub‐nanometer pores, a unidirectional charging characteristic with controllable ion flux is achieved, leading to diodic U‐I characteristics with high rectification ratio. The liquid precursor approach enables successful printing of miniaturized in‐plane CAPodes. A combination of inkjet and extrusion printing techniques with suitable inks was explored to fabricate electrode materials with engineered porosity. Deliberate fine‐tuning of the ultramicroporous carbon's porosity and surface area was achieved using a customized carbon precursor and CO2 etching techniques. Electrochemical evaluation of the printed CAPodes demonstrated successful miniaturization compared with macroscopic film assembly. 3D manufacturing and miniaturization allow for the integration of CAPodes into logic gate circuits (OR, AND). For the first time, these switchable devices are used as variable capacitors in a high‐pass filter application, adjusting the cut‐off frequency of applied alternating voltage analogous to an I‐MOS varactor.This article is protected by copyright. All rights reserved

show abstract

Section: Application Of Macroscopic and Printed Capodes As Variable C...mentioning

confidence: 99%

A Precursor‐Derived Ultramicroporous Carbon for Printing Iontronic Logic Gates and Super‐Varactors

Gellrich,

Shupletsov,

Galek

et al. 2024

Advanced Materials

View full text Add to dashboard Cite

show abstract

Physical and Topological Modeling of a Volume Condenser Structure with a Schottky Barrier

Рехвиашвили

Гаев

Boyko³

2021

Russ Microelectron

View full text Add to dashboard Cite

Influence of gettering on aluminum ohmic contact formation

et al. 2020

View full text Add to dashboard Cite

The study considers the reasons and mechanisms of degradation of reverse characteristics of varicaps with aluminum-based ohmic contacts. The authors present and analyze the experimental results on how gettering affects the reverse current of varicaps, as well as possible mechanisms of such effect. Gettering was performed with a getter site created on the back side of the substrate before the epitaxial layer is deposited on the working side of the substrate. The article demonstrates that the proposed technology using gettering is rather effective in reducing the level of reverse currents and in increasing the yield of devices.

show abstract

An Integrated High-Capacitance Varicap Based on Porous Silicon

Cited by 4 publications

References 3 publications

A Precursor‐Derived Ultramicroporous Carbon for Printing Iontronic Logic Gates and Super‐Varactors

A Precursor‐Derived Ultramicroporous Carbon for Printing Iontronic Logic Gates and Super‐Varactors

Physical and Topological Modeling of a Volume Condenser Structure with a Schottky Barrier

Influence of gettering on aluminum ohmic contact formation

Contact Info

Product

Resources

About