Density of holes decreased at that point where the hole disappeared. Random motion of holes tends to keep the density of holes homogeneous. So eventually some hole will drift to that position.Jd0g33 said:The electrons need energy to cross the potential barrier between the N and P types. So apply a voltage and they get over and recombine with the "holes" and emit a certain wavelength of light. Then what happens?
LEDs (Light Emitting Diodes) are made up of a semiconductor material that is doped with impurities. When an electric current is passed through the LED, the electrons in the semiconductor material get excited and release energy in the form of light. This process is known as electroluminescence, and it allows the LED to continue emitting light as long as the electric current is flowing.
Traditional light bulbs use a filament that gets heated up to produce light, while LEDs use a more efficient process of converting electricity directly into light. This makes LEDs more energy-efficient and longer-lasting than traditional light bulbs.
The brightness of an LED is affected by the amount of current passing through it. The more current, the brighter the LED will be. The color of an LED is determined by the materials used in the semiconductor, with different materials producing different colors of light.
Yes, LEDs can emit a wide range of colors by using different materials in the semiconductor and varying the amount of current passing through. This allows for customizable and programmable lighting options, making LEDs popular in a variety of applications.
LEDs have a very long lifespan compared to traditional light bulbs, with an average lifespan of 50,000 hours or more. This is due to the efficient conversion of electricity into light, as well as the lack of a filament that can burn out over time. This makes LEDs a cost-effective and sustainable lighting option.