To the answer the question of what is led? We could say that led is a semiconductor source of light. It is used as an indicator lamp in many devices and emits a low intensity light. It works through a recombination of electrons with electron holes within the device leading to a release of photons or energy. The led has several advantages over those lamps. Leds are more efficient. They don’t require any color filter to give color. They are very small and can be easily incorporated into circuit boards. Voltage sensitivity, temperature dependence and high initial costs are some disadvantages.
To the question what is led? We could say that led is a semiconductor source of light. It is used as an indicator lamp in many devices and emits a low intensity light. LEDs have several advantages over incandescent lights. They use less energy, have a longer lifetime, are more robust, are smaller in size, have faster switching rate and are very durable and reliable.
People who do not know about the LED often ask what is led and how does it work? The led is the technology that works through the recombination of electrons with electron holes within the device leading to the release of photons or energy. Through the electroluminescence accompanying this process light is emitted from the led. Depending upon the energy gap of the semiconductor an appropriate amount of energy is released and different colours of light are emitted. Early versions emitted only a low red light but modern leds emit visible, ultraviolet and infrared rays.
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