Draw the diagram of a p-n …
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Meghna Thapar 5 years ago
A light emitting diode is simply a forward biased p-n junction which emits spontaneous light radiation. When forward bias is applied, the electron and holes at the junction recombine and energy released is emitted in the form of light. For visible radiation phosphorus doped GaAs is commonly used. The advantages of LEDs are: (i) Low operational voltage and less power. (ii) Fast action with no warm up time. (iii) Emitted light is nearly monochromatic radiation. (iv) They have long life.
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