Read only know that the original 2016 to achieve so many LED technology breakthroughs!

2016 is about to end, recalling the development of the LED industry for a whole year, in many technical problems have been gratifying breakthrough. According to online Jun incomplete statistics, in 2016 so far, LED industry has received more than a dozen breakthrough LED related technologies.

US researchers zoom trick, or let LED zero light?

Researchers at the University of Illinois at Urbana Champaign have developed a new way to increase the brightness of LED and improve its efficiency. Using the industry standard semiconductor long crystal technology, researchers on the silicon substrate to produce gallium nitride (GaN) crystals, which can produce high power green light, used in solid-state lighting.

The University of Illinois Department of electrical and computer engineering assistant professor Can Bayram said: "this is a breakthrough in the process, the researchers succeeded in producing new raw materials in the silicon CMOS process is adjustable on the square (cubic GaN), the GaN material is mainly used for green wavelength emitter. "

Usually GaN forms one or two crystal structures, six squares or cubes. Six square GaN thermal stability, and the application of traditional semiconductors. However, the hexagonal GaN is prone to polarization, the internal electric field will be separated from the positron and negative electrons, to prevent them from combining, resulting in decreased light output efficiency.

Bayram and Liu believe they may GaN square crystal successfully let LED achieve zero attenuation (droop). On the green, blue or UV LED, the luminous efficiency of these LED will be with the current through the input gradually decline, which is also called light.

The industry's first single crystal full-color LED come out

Southern Ostendo TechInc. Laboratory (Ostendo EpiLab.) developed the world's first full-color LED. They use gallium nitride materials to develop three kinds of special quantum structure, can send out three different colors of light, can be fired separately can also be mixed emission. Because LED has the characteristics of power saving and long life, it is possible to replace the current LED Technology (LCD), which is made of full color LED, even beyond the organic light emitting diode (OLED).

New progress in the application of UV LED freeform surface alignment technology

In the city of Chongqing science and technology project support, made important progress in the application of Chinese Academy of Sciences Chongqing Green Intelligent Technology Research Institute for integrated optoelectronic technology research center in the ultraviolet LED free surface light distribution technology, the success of LED ultraviolet light source for exposure machine field, products have been used in PCB, LCD panel, touch screen etc. industry. The relevant results have been awarded the national patent (patent number: 201320875490 for the UV LED collimation lens, a high degree of uniformity of UV LED exposure head 201420651432.4).

The traditional parallel light exposure machine adopts the high pressure mercury lamp as the light source, and the service life is only 1000 hours. Using UVLED to replace mercury lamp light source, life can reach 50 times the mercury lamp, power consumption can be reduced by 90%, significantly reduce production costs, environmental pollution.

At present, the Chongqing academy has breakthrough the key technology of LED multi precision optical free-form surface, suitable for ultraviolet inorganic optical element processing, first developed a parallel light ultraviolet exposure head based on LED, the parallel angle can be controlled within about 2 degrees, lighting uniformity is less than 3%, lighting intensity reached 40mW/cm2.

Saphlux research and development of new technologies to overcome Nakamura Shuji unsolved problems

Saphlux established in 2014 through several tests at the beginning of this year, finally found a solution (involving commercial secrets like inconvenient disclosed), breaking the original semi polar GaN growth pattern, large size sapphire substrate can not only in the standard directly grown on semipolar Gan, can directly control the shape and direction of growth crystal.

This means that the underlying technology breakthrough, is expected to break down the first generation of materials and green light quantum efficiency bottleneck, made of LED and the next generation of high power laser products, high luminous efficiency, especially for major medical and outdoor lighting requirements for the field of high significance.

The use of new materials to make white LED luminous rate significantly improved

Researchers at the National Tsinghua University recently published an article in the Journal ACS Nano, which notes that researchers have used materials other than rare earth elements to produce LED products that can emit white light. The LED based on alkali metal strontium, built a metal organic framework (MOF), in the upper and lower MOF were combined with graphene and other materials, constitutes a direct white light LED. The light emitted by the new material is very close to the natural light, and there is no strong blue light. Because no other color light is blocked, the luminous efficiency can be greatly improved.

Japan has developed a red light without using rare elements LED

According to Japan's Kyodo News reported that Japan's Tokyo Institutet of Technology and Kyoto University, the research team, 21, announced that it has developed a rare element does not use expensive red light-emitting semiconductor. It is reported that the future is expected to make use of the earth's rich nitrogen nitride, low cost for the use of red light-emitting diodes (LED) and solar cells.

It is found that the design efficiency of LED can be reduced

Nanjing University (NJU) researchers using a hybrid nanocrystals approach in InGaN / GaN (InGaN) (GaN) filled with nano crystal blue LED nanoporous structure, it can greatly improve the efficiency of white LED.

They are published in the Applied Physics Letters (Applied Physics)