LED+ graphene really worthy? So look at the big coffee industry

Graphene is a half metallic material (semi-metal), the carrier concentration is as high as 1013 /cm3, and the band structure of Graphene special carrier, can be continuously adjusted between electrons and holes, Graphene showing n type and P type characteristics. The lattice structure of the highly symmetric, the migration of Graphene carrier rate of 15000cm2/ (VS), and the experiments show that the migration rate is almost independent of temperature, indicating that even at room temperature. The influence of Graphene migration rate is still mainly affected by impurities or defects, through improving the quality of the crystal can enhance carrier mobility (up to 100000cm2/ (VS)). These characteristics of Graphene in the foundation for the future application in electronics. So the application of graphene is the most important combination of traditional micro machining technology, a variety of devices (p-n, field effect transistor, single molecule detection) has been realized by experiments, Graphene shows great potential. Although Graphene has wide application prospect in microelectronics, nanoelectronics, spintronics, energy storage, but a large number of high quality, the Graphene sample is still plagued by a problem. Using the micro mechanical cleavage method Graphene is strongly dependent on the use of graphite, the largest area now can get only microns, and the efficiency is low, it is difficult to use in the industry, with a large number of defects using silicon carbide decomposition Graphene, transition metal surface growth of Graphene is not easy to separate and so on for the Graphene industry put forward the problem. Preparation methods of Graphene still need further improvement, perhaps difficult to mass production. On graphene and LED, six years ago after graphene to get the Nobel prize, a lot of people do LED want to use graphene in the LED chip and the radiation field and wrote many patents, the reason is because of its excellent thermal conductivity and electrical conductivity, as well as its high transparent penetration properties, so I see a lot of graphene LED patent is a transparent conductive layer and heat dissipation technology. Graphene is perhaps a very good thermal conductivity material, but the technology and cost now used in the LED will be very wasteful, is a transparent conductive layer is used in chip on the waste, unless there is a production technology breakthrough, to reduce the cost to the graphene coated with the ITO about this, perhaps because of its excellent characteristic the replacement of the current process is possible. As used in the LED thermal materials and so. I think the LED chip are more likely to use faster. (the deputy general manager of Guangdong Deli photoelectric Co Ltd Ye Guoguang)