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light-emitting p-n junction

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  • Light-emitting diode — LED redirects here. For other uses, see LED (disambiguation). Light emitting diode Red, pure green and blue LEDs of the 5mm diffused type Type Passive, optoelectronic Working principle Electr …   Wikipedia

  • light-emitting diode — /luyt i mit ing/. See LED. [1965 70] * * * ▪ electronics       in electronics, a semiconductor device that emits infrared or visible light when charged with an electric current. Visible LEDs are used in many electronic devices as indicator lamps …   Universalium

  • Light-emitting Electrochemical Cell — A light emitting electrochemical cell (LEC or LEEC) is a solid state devices that generates light from an electric current (electroluminesces). They are usually composed of two metal electrodes connected by (e.g. sandwiching) an organic… …   Wikipedia

  • light-emitting diode — noun diode such that light emitted at a p n junction is proportional to the bias current; color depends on the material used • Syn: ↑LED • Hypernyms: ↑diode, ↑semiconductor diode, ↑junction rectifier, ↑crystal rectifier • Hyponyms …   Useful english dictionary

  • junction rectifier — noun a semiconductor that consists of a p n junction • Syn: ↑diode, ↑semiconductor diode, ↑crystal rectifier • Hypernyms: ↑semiconductor device, ↑semiconductor unit, ↑semiconductor …   Useful english dictionary

  • Traffic light — The traffic light, also known as traffic signal, stop light, traffic lamp, stop and go lights, robot or semaphore, is a signaling device positioned at a road intersection, pedestrian crossing, or other location. Its purpose is to indicate, using… …   Wikipedia

  • Vertical-cavity surface-emitting laser — The vertical cavity surface emitting laser (VCSEL; [v ɪxl] ) is a type of semiconductor laser diode with laser beam emission perpendicular from the top surface, contrary to conventional edge emitting semiconductor lasers (also in plane lasers)… …   Wikipedia

  • Bhaskraycharya College of Applied Sciences — Bhaskaracharya College of Applied Sciences was set up in October 1995. It is named after a 12 century mathematician. The college is affiliated with the University of Delhi and is funded by Government of National Territory of Delhi. The main goal… …   Wikipedia

  • Laser diode — Top: a packaged laser diode shown with a penny for scale. Bottom: the laser diode chip is removed from the above package and placed on the eye of a needle for scale …   Wikipedia

  • Diode — Figure 1: Closeup of a diode, showing the square shaped semiconductor crystal (black object on left) …   Wikipedia

  • laser — /lay zeuhr/, n. Physics. a device that produces a nearly parallel, nearly monochromatic, and coherent beam of light by exciting atoms to a higher energy level and causing them to radiate their energy in phase. Also called optical maser. [1955 60; …   Universalium

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