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
Internet
When it comes to efficiency and quality, light-emitting diodes (LED) are the MVP of today's lighting technology. A team of Chinese researchers are using recent LED improvements as a springboard to launch a more interconnected ...
Jan 13, 2023
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58
Electronics & Semiconductors
High resolution density, wide field of view (FoV), lightweight and compact formfactor, and low power consumption are demanding requirements for augmented reality (AR) and virtual reality (VR) displays. Compared to liquid ...
Jan 12, 2023
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14
Electronics & Semiconductors
The evolution of next-generation cellular networks is aimed at creating faster, more reliable solutions. Both the next-generation 6G network and the metaverse require high transmission speeds. Visible light communication ...
Jan 10, 2023
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11
Energy & Green Tech
The past two decades have seen drastic progress in the development of semiconducting metal-halide perovskites (MHPs). The excellent optoelectronic properties and device performance make perovskites very attractive in various ...
Dec 14, 2022
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3
Engineering
If you are reading this article on your computer or phone, it is in part thanks to diodes. Diodes—typically rigid electrical components that easily conduct electric current in one direction—are used for a variety of critical ...
Dec 1, 2022
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128
Energy & Green Tech
Along with bitterly cold temperatures, winter usually brings dry air and the occasional zap of static electricity. Those shocks might be annoying, but researchers are working to harness that otherwise wasted energy with triboelectric ...
Nov 21, 2022
0
38
Engineering
Diodes allow directed flows of current. Without them, modern electronics would be inconceivable. Until now, they had to be made out of two materials with different characteristics. A research team at the Technical University ...
Nov 3, 2022
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220
Engineering
Engineering researchers have created new high-power electronic devices that are more energy efficient than previous technologies. The devices are made possible by a unique technique for "doping" gallium nitride (GaN) in a ...
Sep 6, 2022
0
232
Electronics & Semiconductors
Scientists from Sandia National Laboratories have announced a tiny, electronic device that can shunt excess electricity within a few billionths of a second while operating at a record-breaking 6,400 volts—a significant ...
Mar 15, 2022
1
547
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
