The breakthrough of Jiang team yellow light LED chip, the electro-optical conversion efficiency is much higher in foreign countries

The afternoon of January 22nd, bathed in the winter, the reporter walked into the Nanchang University National Engineering Research Center for silicon-based LED new building opened in Nanchang high tech zone. Here, the team led by Professor Li Yi independent research and development of the silicon substrate yellow light LED chip to achieve a breakthrough, ranking the world's leading level, so that China's LED industry is the world's leading position.

The new building of national silicon LED Engineering Technology Research Center, Nanchang University

Nanchang University national LED Engineering Research Center Based on the research and development of optical LED and other LED products

In the national silicon based LED Engineering Technology Research Center Laboratory in Nanchang University, led by Professor Li Yi led the study of silicon substrate blue light-emitting diode project, won the 2015 national technology invention award.

"China's development must rely on innovation. The process of mastering the core technology is difficult, but this road must go. "In February 3, 2016, Xi Jinping in the inspection of the national silicon based LED Engineering Technology Research Center laboratory researchers put forward the earnest expectations.

A year ago, Jiang team achieved what achievements in technological innovation?

On the afternoon of 22, the core members, Jiang team deputy director of the Nanchang University national silicon LED Engineering Research Center, Dr. Wang Guangxu pointing to the propaganda board, briefed reporters on the side of the center of the silicon substrate of yellow light LED chip field over the past year results.

2016, the center of the research and development of the yellow light LED chip to achieve a breakthrough, yellow light LED electro-optic conversion efficiency reached 21.5%, much higher than the highest level of foreign 9.63%. The bulb is plugged into the socket, 1 watts of power, a light of about 0.2 watts, and the conversion efficiency is about 20%. Wang Guangxu said, "the breakthrough of China's LED industry leading position in the world, has been recognized and highly evaluated include experts in academic circles at home and abroad, the industry Nobel prize winner Nakamura Shuji, the.

The center is how to do the LED conversion efficiency of the yellow light chip greatly enhance it? Wang Guangxu told the Jiangxi network reporter, which is mainly due to the collaborative innovation of MOVCD equipment and technology.

The center staff is testing the chip, the process of testing the quality of the chip through a microscope

Do LED materials, the core of the previous equipment imported, only the United States and Germany, the world's two companies in the production of this core equipment. 2011, we resolutely chose a direction, is to the LED industry, the core equipment MOVCD localization, but also to combine our silicon based LED technology to achieve collaborative innovation. Wang Guangxu said that after three years of efforts, we have independently developed a new generation of high-end MOCVD equipment, this equipment is particularly suitable for the development of yellow light LED.

Wang Guangxu pleased to say that many customers are now very interested in silicon substrate yellow light LED chip technology, many customers try, the effect of the trial is still relatively good view. "

A wide range of LED applications on the silicon substrate. Wang Guangxu for example, yellow light LED chip is very suitable for broiler breeding field, "chicken was born, with the light yellow chicks, chickens from the body is extremely strong, has grown to 2 months old when it came out, the chicken chicken is more robust than the other. "

Huang Guang LED chip market is the largest in its replacement of phosphor. "The current LED lighting is mainly blue LED+ phosphor. Why use fluorescent powder? Because the yellow light LED chip photoelectric conversion efficiency is not high, to use fluorescent powder instead of yellow light LED chip. Now the yellow light LED chip has reached such a high level, you can turn off the life of fluorescent powder, into the true sense of the next generation of semiconductor lighting. "

LED lamp without fluorescent powder

Wang Guangxu told reporters that the phosphors emit yellow light color is pure, is looking at the yellow light, look to see the green light, sometimes can see the red light, and fluorescent powder composed of yellow light LED chip LED chip will be the next generation of semiconductor lighting technology, can provide more health for people across the country more intelligent lighting.

Huang Guang LED chip has achieved a breakthrough, followed by mass production and technology to enhance the. According to the plan, in the first half of 2017, the center of the industrial company Nanchang Yellow Green Lighting Co., Ltd. will be yellow light LED chip into the production line for large-scale production.

Endless innovation! Nanchang University, National Engineering Research Center for silicon-based LED will continue to conduct technical research, closely rely on innovation, and constantly improve the yellow light LED chip for electro-optical conversion efficiency, at the current level to doubled.

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