Silicon is now at the heart of our daily lives. In our smartphones. In our photovoltaic solar panels. It is however not perfect. But this new material closely studied by researchers could well be. Its name, cubic boron arsenide.
Silicon is everywhere. In the chips of our . However, this material A semiconductor would insulate at a temperature of zero kelvin (absolute zero), unlike a metal.
Semiconductors are widely used in…” data-url=”https://news.google.com/sciences/definitions/matiere-semi-conductor-3875/” data-more=”Read more”> is far from perfect. It causes overheating issues. And don’t let all the “particles” loaded. A brake for certain applications. But (MIT, United States) now believe they have found material that ignores these difficulties. They even refer to cubic boron arsenide (c-BA) as never found. Even the best possible semiconductor!
Some — like — have already switched from silicon to silicon carbide. Because, even if its electric mobility is less, its is three times greater. The MIT researchers’ cubic boron arsenide has a thermal conductivity almost ten times greater than that of silicon. And great mobility as well only “holes” — their positive alter egos. “It could be a game changer”comments Jungwoo Shin, researcher, in a .for his
More locks to break
The problem is that for now, cubic boron arsenide remains difficult to produce. At least in sufficient quality to allow it to express all these properties that interest researchers so much. This requires the material to be uniform. And current methods can only produce rather non-uniform cubic boron arsenide.
Another problem: there are still essential properties to make it the which have not yet been tested. Its long-term stability, for example. “Until now, we haven’t paid too much attention to this material”, remarks Gang Chen, another MIT researcher. But now that some of these properties have been revealed, “Perhaps we will give it more credit and we will thus be able to develop methods to characterize it even better and to produce it better. »