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I am having trouble understanding the paper, have the researchers created "just" a single transistor, or have they created circuits containing transistors/diode
by bloopernova 3y ago
I am having trouble understanding the paper, have the researchers created "just" a single transistor, or have they created circuits containing transistors/diodes/capacitors/resistors?
I don't mean to diminish their accomplishment, I'm just trying to get a sense of what scale this is at and whether it can be mass produced yet.
- marcosdumay 3y agoThey created a functional semiconducting wafer. Except that (AFAIK) nobody knows how to add metal to it. But one can use it to make transistors.
- adrian_b 3y agoFor electrical contacts, they have deposited chromium on it, and gold over chromium. That permitted measurements, but due to the low level of doping that could be achieved, the contacts behaved like Shottky diodes, not like ohmic contacts. It is stated in the paper that one of the main targets for further research is to improve the quality of the electrical contacts. Despite the low level of doping, the resistivities obtained for the doped graphene were good, due to the extremely high carrier mobilities.
- adrian_b 3y agoAt least a few more years will be needed to find methods to make better electrical contacts and better methods for doping, but now it seems very likely that this is possible. Before having graphene as a monocrystalline semiconducting layer with good carrier mobilities and a good value for the bandgap, other materials, like molybdenum or tungsten disulfide, seemed much more likely candidates for replacing silicon a decade or more from now. After this breakthrough, graphene moves in front, as the most promising candidate.
- test6554 3y agoWhich I assume, comes with lots of funding.