If there's a huge gap between the lower energy levels and the higher ones, it's hard for electrons to jump to the higher ones, so a current can't flow (electricity is the movement of electrons), and it's an insulator like this glass. 而金属完全没有能级间隙。电子可以轻松地移动到更...
Generally speaking, the term semiconductor refers to a material—like silicon—that can conduct electricity much better than an insulator such as glass, but not as well as metals like copper or aluminum. But when people aretalking about semiconductors today, they are usually referring tosemiconductor...
A semiconductor is a material product with some of the properties of both insulators and conductors (hencesemi,meaning half or partial, conductor). Semiconductors are usually comprised of silicon, since this conducts electricity more than an insulator, such as glass, but less than a pure conductor...
So, for a semiconductor to conduct electricity, electrons must be able to move from the valence band to the conduction band by acquiring enough energy to overcome the band gap. The ability to control the movement of electrons between the valence and conduction bands is what ma...
Any substance will conduct electricity if you put a big enough voltage across it: even air, which is normally an insulator, suddenly becomes a conductor when a powerful voltage builds up in the clouds—and that's what makes lightning. Rather than talking about conductors and insulators, it's...
A substance that can conduct electricity is called theconductorand a substance that cannot conduct electricity is known as the insulator. Semiconductors have properties that sit between the conductor and insulator. Adiode, integrated circuit (IC) andtransistorare all made from semiconductors. ...
They fall somewhere between a conductor of electricity and an insulator, and this unique property makes them essential to electronic devices ranging from the smartphone in your pocket to the solar panels installed on your roof. Learn more about semiconductors, how they work, how they’re made, ...
In this electronics testing guide, we examine the importance of electronics testing as well as explain the various different types. Read more Ideas and Advice Electrical Safety: A Practical Guide for Your Home Keep yourself safe around electricity, power tools, and appliances with this handy electri...
That’s because metal is a great conductor of electricity. (In fact, so is the human body, which is why you can sometimes pass the shock on to an unsuspecting victim.) The opposite of a conductor is an insulator, which impedes the flow of electrons from one material to another. Rubber...
Electricity is all around us--powering technology like our cell phones, computers, lights, soldering irons, and air conditioners. It's tough to escape it in our modern world. Even when you try to escape electricity, it's still at work throughout nature, from the lightning in a thunderstorm...