Does LED+ graphene really match? The industry looks like big coffee.

As a semi gold property (semi-metal) material, the internal carrier concentration of Graphene is as high as 1013 /cm3. Moreover, due to the special band structure of Graphene, the carriers can be continuously regulated between electrons and holes, so that Graphene exhibits N and P characteristics. Due to the highly symmetrical lattice structure, the mobility of Graphene inside the carrier reaches 15000cm2/ (VS), and the experiment shows that the mobility is almost independent of temperature, indicating that even at room temperature, the mobility of Graphene is still mainly affected by impurities or defects, and the current carrying capacity can be increased by increasing the crystal quality. The mobility of the child is as high as 100000cm2/ (VS). These characteristics lay the foundation for the application of Graphene in future electronics. Therefore, the most important application field of graphene is combining traditional micromachining technology. Various devices (p-n junction, field-effect transistor, single molecule detector, etc.) have been realized by experiments, and Graphene has great potential for application. Although Graphene has wide application prospects in microelectronics, Nano Electronics, spintronics, energy storage and so on, a large number of high-quality Graphene samples are still troubling people. The Graphene obtained by micromechanical cleavage is strongly dependent on the graphite used. The maximum area available at present is only micron scale, and it is inefficient and difficult to use in industry. The Graphene obtained by SiC decomposition has a lot of defects, and the Graphene grown on the transition metal surface is not easy to separate. It raises problems for the industrialization of Graphene. The preparation of Graphene still needs further improvement, and it may be difficult to produce a lot of products. About graphene and LED, six years ago, graphene received the Nobel prize. Many people who wanted to make LED want to use graphene in LED chip and heat dissipation field and wrote many patents. The reason is because of its excellent thermal conductivity and conductivity, and of course, its high transparency penetrability, so I saw a lot of graphene. The LED patents are transparent conductive layer and heat dissipation technology. Graphene may be a very good thermal conductive material, but it will be very wasteful to use technology and cost in LED. At present, it is a waste to use on the transparent conductive layer of chips. Unless there is breakthrough in production technology, the cost of graphene coating will be reduced to almost the same as that of ITO. The present technology is also possible. The same applies to LED cooling materials. I think LED chips are more likely to be used more quickly. (Wen / Ye Guoguang, deputy general manager of Guangdong Deli optoelectronics Co., Ltd.)