Results 21 to 30 of about 85,220 (297)

Self-precharge in single-leg flying capacitor converters [PDF]

open access: yes, 2009
Flying Capacitor (FC) multilevel pulse width modulated (PWM) converters are an attractive choice due to the natural voltage balance property. During start-up of the converter, care has to be taken that the power switches are not exposed to voltage ...
Melkebeek, Jan   +2 more
core   +2 more sources

Visible Light Communication System Technology Review: Devices, Architectures, and Applications

open access: yesCrystals, 2021
Visible light communication (VLC) is an advanced, highly developed optical wireless communication (OWC) technology that can simultaneously provide lighting and high-speed wireless data transmission.
Tai-Cheng Yu   +5 more
doaj   +1 more source

Efficient green light-emitting diodes based on quasi-two-dimensional composition and phase engineered perovskite with surface passivation

open access: yesNature Communications, 2018
Solution-processable halide perovskites have high luminous efficiency and excellent chemical tunability, making them ideal candidates for light-emitting diodes. Here Yang et al.
Xiaolei Yang   +9 more
doaj   +1 more source

Design of Strained Ge Schottky Diode on Si Substrate for Microwave Rectifier Circuit

open access: yesAdvances in Condensed Matter Physics, 2020
In recent years, wireless energy transmission technology has developed rapidly and has received increasing attention in the industry. For microwave wireless energy transfer system applications, Ge Schottky diodes as the core components of the rectifier ...
Wei-Feng Liu   +4 more
doaj   +1 more source

A Family of Transformerless Quadratic Boost High Gain DC-DC Converters

open access: yesEnergies, 2021
This paper presents three new and improved non-isolated topologies of quadratic boost converters (QBC). Reduced voltage stress across switching devices and high voltage gain with single switch operation are the main advantages of the proposed topologies.
Mohammad Zaid   +8 more
doaj   +1 more source

Fabrication and Characterization of Ultra-wide Bandgap AlN-Based Schottky Diodes on Sapphire by MOCVD

open access: yesIEEE Journal of the Electron Devices Society, 2017
AlN Schottky diodes with various device geometries were fabricated on sapphire substrate and their temperature-dependent current-voltage characteristics were analyzed.
Houqiang Fu   +4 more
doaj   +1 more source

Encapsulation of Dyes in Luminescent Metal-Organic Frameworks for White Light Emitting Diodes

open access: yesNanomaterials, 2021
The development of white light emitting diodes (WLEDs) holds great promise for replacing traditional lighting devices due to high efficiency, low energy consumption and long lifetime.
Zhihong Sun   +5 more
doaj   +1 more source

Array concepts for solid-state and vacuum microelectronics millimeter-wave generation [PDF]

open access: yes, 1989
The authors have proposed that the increasing demand for contact watt-level coherent sources in the millimeter- and submillimeter-wave region can be satisfied by fabricating two-dimensional grids loaded with oscillators and multipliers for quasi-optical ...
Hwu, Ruey J.   +6 more
core   +1 more source

The merits and limitations of local impact ionization theory [PDF]

open access: yes, 2000
Multiplication measurements on GaAs p+-i-n+s with i-region thicknesses, w, between 1 μm and 0.025 μm and Monte Carlo (MC) calculations of the avalanche process are used to investigate the applicability of the local ionization theory.
David, J.P.R., Ong, D.S., Plimmer, S.A.
core   +1 more source

GaN Active Rectifier Diode

open access: yesIEEE Open Journal of Power Electronics, 2022
Active or synchronous rectification is used today to further increase the efficiency of mass-market power supplies by eliminating the turn-on voltage of rectifier diodes, thus reducing conduction losses.
Michael Basler   +4 more
doaj   +1 more source

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