The 5 technologies are different in the field of LED.

Deng Xiaoping said, "science and technology are the primary productive forces". Admittedly, "social development depends on science and technology, and technological progress depends on innovation". The development of LED lighting industry also needs to seek breakthroughs. August has arrived. Looking back on the good news of breakthroughs in new technologies at home and abroad in recent days, today Xiaobian decided to introduce each of us first, and feel the rapid progress of science and technology.

Ultra fast LED light emitting device

Researchers at Duke University recently developed a LED light emitting device that can open and close 90 billion times in one second, which can be used as the basis of optical computing technology.

Grilled one: now we can't get away from smart phones every day, charging every day, but probably not many people know that a small battery has billions of transistors inside, and can be powered by electrons that can be opened at hundreds of billions of times per second. Recently, researchers at Duke University have developed a LED light emitting device that can be opened 90 billion times in one second, and can be used as the basis of optical computing technology. Next, as long as researchers continue to work hard to develop a light source that allows fast opening and closing, so that microchips can use photon instead of electrons to process and transmit data, the speed of the computer can be greatly improved. According to introducing, although laser can satisfy this requirement, but because of the problem of excessive energy consumption and large volume of launcher, it is not suitable for working inside the computer. Now, the fast light emitting device developed by Duke University indicates that the researchers are one step closer to making light sources suitable for use in optical computers. Although the revolution has not yet been successful, it is a step closer to success, and it is indeed gratifying.

Two. Phosphene luminescent materials

Scientists at Australian State University recently discovered the luminescent properties in the study of phosphor thin layer, which is expected to open up a new light for ultra-thin and ultra light solar cell (PV) batteries and LED applications.

Grilled one: compared with the graphene which had been burned for a while, the name "phosphorene" is a little strange. Compared with graphene, phosphene is a semiconductor that is more like silicon (Silicon). As we all know, silicon is the foundation of electronic technology. The phosphonene created by the team of scientists is the same way as the discovery of graphene to win the Nobel prize in physics, that is, the use of tape to strip the thinner crystalline layer in the form of phosphorus in the form of black crystals. According to the researchers, because the surface state of the phosphene can be minimized, it is different from the silicon which is thick enough to be used for light and thin state. The performance of phosphonene in thin layer is better than that in silicon. In addition to creating a more lightweight semiconductor than silicon, phosphene also has a light-emitting property and different thickness of lamination, enabling more flexible production. Because phosphene is light and thin, it creates opportunities for making many interesting devices, such as LED or solar cells, showing very promising luminescent properties.

Three. White light emitting lasers

For the first time, scientists in the United States have developed a laser that can produce white light. White light lasers are brighter and more efficient than light emitting diodes (LED), and will play an important role in lighting and wireless communications in the future, researchers say.

Grilled one: the laser which has been widely used in many fields has always had a short board: only a single wavelength of light can be emitted. To solve this problem, a laser that can produce white light appears. The research team at Arizona State University recently developed a novel nanosheet. The size of this thin semiconductor is only 1/5 of that of the hair. The thickness is only 1/1000 of that of the hair. It has three parallel parts, and each part can emit a laser of red, blue and green. When the three primary colors meet, white laser appears. This latest research result has made a step forward in laser replacing LED as the mainstream light source. Another important application of the study will include the field of visible light communication (LiFi), looking forward to the future, indoor lighting system or communication. At present, the popular "WiFi" uses radio waves, and the speed of LiFi can reach 10 times that of WiFi. However, there is a strong middle hand and a mountain and a mountain high. It is said that the speed of white laser WiFi may be 10 to 100 times more than that of LED's LiFi. Unfortunately, there is still a great deal of hurdles to be resolved to apply this white laser to the actual lighting or display system. Or the phrase, "revolution..."

Four. Color adjustable graphene LED

Tsinghua University has recently made a color adjustable graphene LED, which breaks through the way of color synthesis of existing display devices, and is expected to have a revolutionary impact on display, lighting and communication technology. LED

Pick up a grill: there are so many foreign scientists and technicians who can say that they can't save oil. It is understood that the luminous color and wavelength of light-emitting diodes (LEDs) are determined by luminescent materials. Once the preparation is completed, the two properties are determined. At present, the idea of using a LED to change the color of lights is hard to achieve. A few days ago, the Tsinghua University research group produced new luminescent materials from two different forms of graphene. For the first time, in a light-emitting system based on graphene materials, it was proved that only one LED could be used to adjust different colors of light. The research team developed the color adjustable graphene LED, covering all the visible spectrum of the color except for dark blue and violet. It is also reported that this new LED breaks through the way of color synthesis of existing display devices, and hopes to have a revolutionary impact on display, lighting and communication technology. Because the color of light will change with specific chemicals, such devices may also be used to prepare special sensors. No wonder experts have highly praised this: "this work is expected to expand new research directions in the field of light-emitting devices", "this work is exciting and influential."

Five, the most powerful laser equipment in the world

Scientists at Osaka University in Japan say that the "fast ignition laser (LFEX)" can produce 20 million gigawatts of laser beams and is the most powerful laser beam capable of launching the world's strongest energy.

Pick up a grill: "Star Wars 7, the awakening of the force" is about to come back. Friends who are familiar with this series of sci-fi movies will be exposed to age. In any case, "Star Wars fans" must be impressed by the "Death Star weapon". Recently, we have heard that the "fast ignition laser (LFEX)" used by researchers at Osaka University in Japan can produce 20 million gigawatts of laser beams, which means that this laser beam is very similar to the "dead star weapon" in science fiction movies. The researchers produced high-energy output from low-energy devices, emitting laser beams only through 1 picoseconds (trillions of seconds). In order to amplify the power of laser beam, energy will be applied to the glass panel of 100 meter long LFEX equipment and be amplified step by step. It is understood that the 5 kilowatt laser beam can shoot down the UAV 1.6 kilometers away. Before that, the world's University of Texas only made 10 million gigawatts of lasers. The latest laser equipment of Osaka University in Japan can produce 20 million gigawatts of lasers. The research team also said that the future laser equipment will produce 100 million gigawatts of lasers. LFEX laser equipment is also mainly scientific research value, and has not yet been put into practical application.

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