Engineering
(Tech Xplore)—Researchers have fabricated a large-area textile that emits bright yellow light for more than 180 hours. The low-cost, flexible, transparent textile has potential applications in light-emitting clothing, signs, ...
Engineering
Take apart your laptop screen, and at its heart you'll find a plate patterned with pixels of red, green, and blue LEDs, arranged end to end like a meticulous Lite Brite display. When electrically powered, the LEDs together ...
Feb 1, 2023
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83
Engineering
Imagine a world where smartphones, laptops, wearables, and other electronics are powered without batteries. Researchers from MIT and elsewhere have taken a step in that direction, with the first fully flexible device that ...
Jan 28, 2019
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1207
Engineering
The latest development in textiles and fibers is a kind of soft hardware that you can wear: cloth that has electronic devices built right into it.
Aug 8, 2018
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293
Electronics & Semiconductors
A team of South Korean scientists led by Professor KIM Dae-Hyeong of the Center for Nanoparticle Research within the Institute for Basic Science has pioneered a novel approach to stretchable displays. The team announced the ...
Apr 15, 2024
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17
Engineering
New multidisciplinary research from the University of St Andrews could lead to more efficient televisions, computer screens, and lighting.
Mar 27, 2024
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45
Engineering
A research team led by Prof. Meng Guowen and Prof. Han Fangming from the Hefei Institutes of Physical Science of the Chinese Academy of Sciences, together with Prof. Wei Bingqing from the University of Delaware, miniaturized ...
Mar 19, 2024
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94
Engineering
Research and industry worldwide work on the commercialization of perovskite photovoltaics. Most research laboratories focus on solvent-based manufacturing processes because these methods are versatile and easy to use. Established ...
Mar 14, 2024
1
27
Engineering
A research team led by Lawrence Berkeley National Laboratory (Berkeley Lab) has developed "supramolecular ink," a new technology for use in OLED (organic light-emitting diode) displays or other electronic devices. Made of ...
Jan 22, 2024
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34
Energy & Green Tech
A team of advanced materials chemistry researchers have made a significant breakthrough in the use of light to convert carbon and carbon dioxide (CO2) into carbon monoxide (CO).
Dec 12, 2023
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78
In electronics, a diode is a two-terminal device (thermionic diodes may also have one or two ancillary terminals for a heater).
Diodes have two active electrodes between which the signal of interest may flow, and most are used for their unidirectional electric current property. The varicap diode is used as an electrically adjustable capacitor.
The unidirectionality most diodes exhibit is sometimes generically called the rectifying property. The most common function of a diode is to allow an electric current in one direction (called the forward biased condition) and to block the current in the opposite direction (the reverse biased condition). Thus, the diode can be thought of as an electronic version of a check valve.
Real diodes do not display such a perfect on-off directionality but have a more complex non-linear electrical characteristic, which depends on the particular type of diode technology. Diodes also have many other functions in which they are not designed to operate in this on-off manner.
Early diodes included “cat’s whisker” crystals and vacuum tube devices (also called thermionic valves). Today most diodes are made of silicon, but other semiconductors such a germanium are sometimes used.
This text uses material from Wikipedia, licensed under CC BY-SA
