Graphene — Awesome stuff, massive development on the basis of which began to emerge in recent years, more and more, continues to delight. Its ability to convert light into electricity demonstrates its potential to surpass the efficiency of silicon, which can be a revolution in the creation of electronics.
Here is how he explains the scientific basis behind this technology, the journal «Nature Physics»:
Since the hot electrons in graphene can conduct current, the generation of multiple hot-carrier carafe makes a very promising material for high-performance broadband light energy extraction.
Simply: graphene generates a plurality of electrons from each photon, whereas silicon — current material for solar panels — can only generate one electron of each photon.
Because graphene is able to completely convert all the received energy, without losing anything in the process, this results in a huge increase in overall efficiency.
Meet the "super-cap"
Farad Manju in his article summarizes the opportunities that could allow graphene to move our focus attention on battery technology to the capacitors:
One way to improve battery life — is to forget about them and focus instead on the capacitors. Capacitors, like batteries — devices that retain electrical energy. But they charged and discharged more quickly than batteries. So if your phone is a capacitor instead of battery, you can charge it for a few seconds, not hours. But there is a big lack of capacitors — their energy density is even smaller than that of batteries. You can not use the phone on the capacitor, unless agreed that it was the size of a loaf of bread.
But for now, we already have a simple technique of creating micro-supercapacitors, and it was discovered almost by accident — when the students of the University of California were playing with the laser unit. According to Maher El-Kadi, one of them: "The attractiveness of this technology is that anyone can do it — it's very simple. You take a piece of plastic, buy a little dioxide graphite, poke it all in your CD drive and turn it into graphene. " What is especially noteworthy — this seemingly primitive technique allows to "create the most effective to date supercapacitors."
The thus-obtained micro-supercapacitors on performance far superior to those available now — and in the hundreds and thousands of times — and still have an incredibly low cost.
Here's what experts write-futurists of the potential of the new elements:
New micro-supercapacitors easily bend and twist, making them potentially useful as energy storage devices for flexible electronics such as roll-up displays and TVs, electronic paper, and even portable gadgets.
These mikrokondensatory exhibit excellent cyclic stability — an important advantage over Micro cells, which have a shorter life span, that is a serious problem when they are incorporated into a permanent structure — such as biomedical implants, active RFID chips and embedded micro-sensors — for which service and replacement are not available.
All available evidence indicates that the implementation of this technology is at a distance of years, if not decades, before the disclosure of its full potential, but the huge range of possible applications is sure to spur more research in this direction.
Below you can see a video that shows the initial discovery of graphene, as well as its production and the intriguing possibilities of this new technology: