puolijohdevalonlähteiden

Puolijohdevalonlähteet, commonly known as light-emitting diodes (LEDs), are semiconductor devices that emit light when an electric current passes through them. This process is called electroluminescence. Unlike incandescent bulbs that produce light by heating a filament until it glows, LEDs are far more energy-efficient and have a significantly longer lifespan.

The basic structure of an LED involves a semiconductor chip containing two layers, a p-type and an n-type semiconductor, joined at a p-n junction. When a voltage is applied, electrons from the n-type material combine with holes in the p-type material at the junction. This recombination releases energy in the form of photons, which are particles of light. The color of the light emitted depends on the semiconductor material used and its band gap energy.

LEDs are widely used in various applications due to their efficiency, durability, and compact size. They are found in lighting systems, displays for televisions and smartphones, indicator lights, automotive lighting, and even in medical devices. The development of LEDs has revolutionized lighting technology, offering a more sustainable and versatile alternative to traditional light sources. Their ability to be controlled precisely also makes them suitable for complex lighting designs and dynamic displays.