This doping can create different types of layers: p-type layers and n-type layers. The layers are “doped” with impurities, which is to say that atoms of elements other than those originally in the semiconducting material are mixed in. LEDs consist of two layers of semiconducting material. LEDs are made of semiconducting materials, materials which conduct electricity under some conditions but not others. Several different semiconducting materials can be used in LEDs, but a lot of them are gallium-based, for example gallium nitride and gallium phosphide. It makes sense to start by explaining how LEDs can produce light in the first place. Before we discuss that though, let’s begin with the basics. Though they may look small, they’re packing some serious science – in fact, the 2014 Nobel Prize in physics went to scientists who worked on discovering how to make efficient blue LEDs. LED stands for light-emitting diode, and they come in a whole range of colours, from reds and oranges to blues and violets. How do these lights actually work, and how can they be made to produce such an array of colours? This graphic takes a look at the chemistry. Christmas isn’t far off now, and whether you’re celebrating it or not, you’ve may well have started seeing Christmas lights starting to appear adorning houses and Christmas trees.
0 kommentar(er)
