Optical diode: Photodiode Photoreceptor Tube

Optical diode or "Photodiode" is "a type of semiconductor diode that converts photons into electrical charge according to the...

Optical diode or "Photodiode" is "a type of semiconductor diode that converts photons into electrical charge according to the photoelectric effect". The photons can be in the visible, infrared, ultraviolet, X-ray, and gamma-ray spectrum regions. When the photon penetrates the active layer of the photodiode, which is the p-n junction or the PIN structure, an electrical charge is generated, which gives rise to an electric current. Depending on the manufacturing method, this current is small and the photodiode is used as a photon sensor, or the current is large enough to serve as a power source like in a solar cell.

20pcs 3MM Photodiode Photoreceptor Tube Photoreceptor Diode Photosensitive Sensor


See: 3MM Photodiode Photoreceptor Tube

20pcs/lot 3MM photodiode photosensitive receiver photosensitive receiver diode photosensors In Stock

See: 3MM photodiode photosensitive receiver


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Photodiode sensors have wide applications in electronic engineering, especially in instrumentation, monitoring, information transmission and control. They range from a single form factor that senses something like the paper in a printer tray is empty, to an integrated array (Array) like an image sensor with millions of elements like a CCD sensor.

Photodiode is made of several semiconductors, and the working light spectrum region. The range of visible light is from 380 nm to 780 nm. Photodiode has an active layer structure of p-n junction, newer type is a PIN structure. When photons of sufficiently high energy penetrate this active layer, they are absorbed, and by the photoelectric effect an electron-hole pair is created.

The photoelectric effect is a phenomenon associated with semiconductors, so when making components that do not work with photons, the light must be covered. Shields are not perfect, so electronics can fail or fail when entering high noise areas, such as X-ray, strong gamma rays, or space.

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