Two-dimensional (2D) materials are expected to take over the doomsday of silicon materials in 2028 as indicated by the International Technology Roadmap for Semiconductors (ITRS). The well-known one is graphene; scientists are also studying other “dream materials”, including Transition metal dichalcogenides (TMD), such as molybdenum disulphide (MoS2). Now a new 2D material – black phosphorus – is thought to be able to solve some of graphene’s problems.
Black phosphorus does not have the shortcomings of graphene – graphene lacks a bandgap and is incompatible with silicon; its compatibility with silicon is expected to promote the development of silicon photonics technology, by which time various chips will be based on Light, not electrons, transmits digital signals. Li Mo, a professor at the University of Minnesota who led the research team, said: “We have demonstrated for the first time that a crystalline black phosphorus photodetector can be transferred into a silicon photonic circuit and its performance is as good as germanium – this It is the gold standard for photoelectric detectors.”
Phosphorus is a highly reactive substance in nature – which is why they are used to make matches – but when phosphorus is baked in an oven at a precise temperature, its color turns black and its properties change. It is very stable and transforms into a pure crystalline form that can be peeled off onto a silicon substrate. Researchers at the University of Minnesota used 20 monolayers of black phosphorus to create the first component to demonstrate its optical circuit, which is said to be able to reach communication speeds of 3Gbps.
The biggest advantage of black phosphorus over graphene is that it has an energy gap, making it easier to detect light; and its energy gap can be adjusted by the number of black phosphorus layers stacked on a silicon substrate, so that it can absorb visible light range and Wavelengths in the infrared range used for communications. In addition, because black phosphorus is a direct-band semiconductor, it can also convert electronic signals into light. Li Mo said: “One of our short-term goals is to make black phosphorus transistors, and the long-term goal is to Implementation of black phosphorus laser components in silicon wafers”
Li Mo claimed that among the various 2D materials currently being studied, there is no serious trade-off problem between the adjustable energy gap characteristics of black phosphorus and the high-speed operation performance of other materials. This makes This material “performs well” in both of the above conditions. Sponsors of this research project include the U.S. Air Force Office of Scientific Research and the U.S. National Science Foundation (NSF).
Extended reading: https://www. alltextile.cn/product/product-13-298.html
Extended reading: https://www.yingjietex.com/product/300D-Polyester-Strip-Dobby-OXFORD-Fabric.html
Extended reading:https://www.china-fire-retardant.com/post/9390.html
Extended reading:https://www.alltextile.cn/product/product-59-905.html
Extended reading: https://www.alltextile.cn/product/product-54-742.html
Extended reading: https://www.yingjietex.com/product/polyester-taffeta-Printing -fabrics.html
Extended reading: https://www.alltextile.cn/ product/product-91-897.html
Extended reading: https://www .china-fire-retardant.com/post/9268.html
Extended reading: https://www.yingjietex.com/product/800D-120D-Polyester-Dobby-OXFORD-Fabric.html
Extended reading:https://www.alltextile.cn/product/product-27-969.htm
